Cylinder sleeve disassembling device

Abstract

A cylinder sleeve disassembling device comprises a hydraulic jack, a fixing plate, a supporting column, a connecting pipe, a pull rod, a pull plate and a fixing seat, the fixing plate is horizontally fixed to the upper portion of an engine frame through the supporting column, the hydraulic jack is fixed to the top of the fixing plate, the fixing seat is rotationally connected with a washing flat, screw holes are formed in the pull plate and the fixing seat in a matched mode, and the connecting pipe is connected with the connecting pipe. The pulling plate is fixed to the fixing base through a bolt structure, the pulling plate can rotate to a nearly horizontal position by means of self weight after penetrating through the inner wall of the cylinder sleeve, and then when the pulling plate is pulled to ascend, the outer edge of the pulling plate can lift the bottom of the cylinder sleeve. The pulling plate is fed into the inner wall of the cylinder sleeve to the position below the bottom of the cylinder sleeve by controlling the output shaft of the hydraulic jack to vertically move up and down, then the cylinder sleeve is lifted from the bottom to be separated from an engine frame body upwards, and therefore disassembling of the engine cylinder sleeve is completed, applied torque is more stable in the whole disassembling process, physical strength of an operator is saved, and working efficiency is improved. And the convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engine cylinder liners, in particular to a cylinder liner disassembly device. Background Art

[0002] During the daily operation of an engine, problems such as assembly issues, insufficient lubrication, and piston carbon deposits inevitably cause wear on the cylinder liner, which in turn affects engine power. This necessitates replacement of the engine cylinder liner, but the interference fit between the cylinder liner and the engine frame makes disassembly very cumbersome, and cutting, grooving, and grinding are commonly used. These methods require high professional expertise from operators and related equipment, making them difficult to implement universally. Furthermore, the risk of damage to the engine frame during operation is difficult to control, resulting in high costs. Therefore, it is meaningful to develop a cylinder liner disassembly device designed for situations where operation is difficult and disassembly risks are high. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the purpose of the present invention is to provide a cylinder liner disassembling device to solve the technical problem of the inconvenience of disassembling the existing engine cylinder liner when replacing it.

[0004] The utility model is realized through the following technical solutions

[0005] A cylinder liner disassembly device includes a hydraulic jack, a fixing plate, a support column, a connecting pipe, a pull rod, a pull plate and a fixing seat, wherein the fixing plate is horizontally fixed to the top of the engine frame by the support column, and a hydraulic jack is fixed on the top of the fixing plate. A through hole is provided in the middle of the fixing plate for the output shaft of the hydraulic jack to pass vertically, and the output shaft is connected to one end of the pull rod by a connecting pipe, and the other end of the pull rod is constructed with a wash flat. Pin holes are horizontally provided on the axis of the fixing seat and the wash flat, and the pin shaft passes through the above-mentioned pin hole and is axially limited by a washer and a cotter pin so that the fixing seat and the wash flat are rotatably connected, screw holes are provided on the pull plate and the fixing seat, and the pull plate is fixed to the fixing seat by a bolt structure. The pull plate can rotate to a nearly horizontal position by its own weight after passing through the inner wall of the cylinder liner. Thereafter, when the pull plate is pulled up, its outer edge can lift the bottom of the cylinder liner.

[0006] Preferably, the axial cross-section of the cylinder liner is circular, and the shape of the pull plate is a cut concentric circle, the diameter of the concentric circle is between the inner diameter and the outer diameter of the cylinder liner, and two parallel edges are cut symmetrically about the center of the concentric circle, and the distance between the parallel edges is smaller than the inner diameter of the cylinder liner. After the pull plate passes through the inner wall of the cylinder liner along the direction of its parallel edges, it rotates to a nearly horizontal position by its own weight. Thereafter, when the pull plate is pulled up, its outer edge can support the bottom of the cylinder liner.

[0007] Preferably, the pull plate is provided with four first mounting holes, which are uniformly arranged circumferentially about the center of the concentric circles, and the connecting lines of the two groups of non-diagonal first mounting holes are arranged parallel to the parallel sides. There are two fixing seats, which have the same structure. The pin holes at the axis centers are connected to the two sides of the flattened pin holes through pin shafts. Each fixing seat is also provided with two countersunk holes perpendicular to its axis center. A pressure plate is also provided between the pull plate and the fixing seat, and four second mounting holes are provided on the pressure plate. Each first mounting hole, second mounting hole and countersunk hole are matched with each other, and the pull plate, pressure plate and fixing seat are connected in turn after being screwed through the corresponding holes.

[0008] Preferably, the output shaft is provided with threads, one end of the pull rod is provided with threads, and the inner wall of the connecting pipe is matched with threads, and its two ends are respectively threadedly connected to the output shaft and one end of the pull rod.

[0009] Preferably, there are three support columns with the same structure. Three third mounting holes are evenly arranged on the fixing plate along its outer edge. The inner wall of each third mounting hole is provided with a thread. The top section of each support column is provided with a thread. The top section is screwed through the corresponding third mounting hole and fixed with a nut.

[0010] Preferably, the bottom of the support column is trumpet-shaped and the end surface thereof is straight.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The utility model utilizes a hydraulic jack, a pull rod indirectly connected to the output shaft of the hydraulic jack, and a pull plate that can be axially rotated on the pull rod and is suitable for the size of the cylinder liner. By controlling the vertical movement of the hydraulic jack output shaft, the pull plate is sent into the inner wall of the cylinder liner until it is below the bottom of the cylinder liner, and then the cylinder liner is lifted from the bottom and separated from the engine body, thereby completing the disassembly of the engine cylinder liner. Because the cylinder liner is only removed by the action of the pull plate and the hydraulic jack, the torque applied during the entire disassembly process is more stable, which also saves the operator's physical strength, improves the convenience of disassembly, reduces damage to the inner circle of the cylinder liner installation, and facilitates the installation of a new cylinder liner later. In addition, during the entire disassembly process, only the pull plate needs to be replaced according to the relevant cylinder liner size, and other parts are universal, reducing the cost of use.

[0013] 2. The utility model fixes the fixing plate carrying the hydraulic jack to the top of the engine frame by using a support column. The bottom of the support column is designed to be trumpet-shaped and its end face is straight, so that the hydraulic jack can smoothly lower and lift above the engine frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 This is a schematic diagram of the forward structure of the cylinder liner disassembly device of the utility model;

[0016] Figure 2 This is a schematic diagram of the lateral structure of the pull plate of the utility model holding up the bottom of the cylinder sleeve;

[0017] Figure 3 This is a structural diagram of the pull plate of the utility model;

[0018] Figure 4 This is a structural diagram of the pressing plate of the utility model;

[0019] Figure 5 This is a cross-sectional view of the fixing seat of the utility model;

[0020] Figure 6 This is a schematic structural diagram of the pull rod of the utility model;

[0021] Figure 7 This is a structural diagram of the fixing plate of the utility model;

[0022] Figure 8 This is a structural diagram of the support column of the utility model.

[0023] Among them, the hydraulic jack 1, the output shaft 101, the fixed plate 2, the third mounting hole 202, the through hole 201, the support column 3, the connecting pipe 4, the pull rod 5, the washer 501, the pull plate 6, the concentric circles 601, the parallel edges 602, the first mounting hole 603, the fixing seat 7, the countersunk hole 701, the pin shaft 8, the pressure plate 9, the second mounting hole 901, the cotter pin 10, and the cylinder sleeve 11. DETAILED DESCRIPTION

[0024] 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 drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0025] The technical solution of the present utility model is further described below with reference to the accompanying drawings. Figure 1-8The figure shows a cylinder liner disassembly device, comprising: a hydraulic jack 1, a fixing plate 2, a support column 3, a connecting pipe 4, a pull rod 5, a pull plate 6, and a fixing seat 7. The fixing plate 2 is horizontally fixed to the top of the engine frame by the support column 3. The hydraulic jack 1 is fixed on the top of the fixing plate 2. A through hole 201 is provided in the middle of the fixing plate 2 for the output shaft 101 of the hydraulic jack 1 to pass vertically. The output shaft 101 is connected to one end of the pull rod 5 via a connecting pipe 4. Figure 6 The other end of the pull rod 5 is constructed with a wash flat 501. Pin holes are provided horizontally on the axis of the fixed seat 7 and the wash flat 501. After the pin shaft 8 passes through the above-mentioned pin hole and is axially limited by a washer and a cotter pin 10, the fixed seat 7 is rotatably connected to the wash flat 501. Screw holes are provided on the pull plate 6 and the fixed seat 7. The pull plate 6 is fixed to the fixed seat 7 by a bolt structure. After the pull plate 6 passes through the inner wall of the cylinder liner 11, it can rotate to a nearly horizontal position by its own weight. After that, when the pull plate 6 is pulled up, its outer edge can support the bottom of the cylinder liner 11. By controlling the straight up and down of the output shaft of the hydraulic jack 1, the pull plate 6 is sent into the inner wall of the cylinder liner 11 until it is below the bottom of the cylinder liner 11, and then the cylinder liner 11 is lifted from the bottom and separated upward from the engine frame, thereby completing the disassembly of the engine cylinder liner. Because the cylinder liner is removed solely by pulling plates and hydraulic jacks, the torque applied during the entire disassembly process is more stable, saving the operator's physical strength. Compared to traditional cutting, grooving, and grinding methods, the operation is simpler, with significantly lower costs and operational risks. The device is quick and easy to install, can be installed and put into use in a short time, has low operating costs, is less difficult to operate, and provides a high degree of reliability.

[0026] The pull plate 6 can be replaced according to the size of the relevant cylinder liner. As an embodiment of the present invention, the axial cross section of the cylinder liner 11 is circular, such as Figure 3 The shape of the pull plate 6 is a cut concentric circle 601, the diameter D of the concentric circle 601 is between the inner diameter and the outer diameter of the cylinder liner 11, and two parallel edges 602 are cut symmetrically about the center of the concentric circle 601. The distance d between the two parallel edges 602 is smaller than the inner diameter of the cylinder liner 11. After the pull plate 6 passes through the inner wall of the cylinder liner 11 along the direction of its parallel edges 601, it rotates to a nearly horizontal position by its own weight. After that, when the pull plate 6 is pulled up, its outer edge can support the bottom of the cylinder liner 11.

[0027] The specific structure of the pull plate 6 is as follows: the pull plate 6 is provided with four first mounting holes 603, which are evenly arranged circumferentially about the center of the concentric circle 601. The connecting line of the two groups of non-diagonal first mounting holes 603 is parallel to the parallel edge 602. There are two fixing seats 7, both of which have the same structure. The pin hole at the axis of the fixing seat 7 is connected to the pin holes on both sides of the washing flat 501 through the pin shaft 8. Figure 5Each fixing seat 7 is provided with two countersunk holes 701 perpendicular to its axis. A pressing plate 9 is provided between the pulling plate 6 and the fixing seat 7. Figure 4 , four second mounting holes 901 are opened on the pressing plate 9. Each first mounting hole 603, second mounting hole 901, and countersunk hole 701 are correspondingly arranged, and the pull plate 6, pressing plate 9, and fixing seat 7 are connected in sequence by screwing bolts through the corresponding holes.

[0028] As for the specific method of connecting the output shaft 101 and one end of the pull rod 5 through the connecting tube 4, pin holes can be provided on both ends of the connecting tube 4, and pin holes are opened at corresponding positions of the output shaft 101 and one end of the pull rod 5, and pins are inserted to connect them. In order to consider the convenience of installation and connection, it is preferred that a screw connection structure is set between them. Specifically, the output shaft 101 is provided with a thread, one end of the pull rod 5 is provided with a thread, and the inner wall of the connecting tube 4 is provided with a thread, and its two ends are respectively threadedly connected to the output shaft 101 and one end of the pull rod 5.

[0029] There are three support columns 3 with the same structure. Figure 7 Three third mounting holes 202 are evenly arranged along the outer edge of the fixing plate 2. The inner wall of each third mounting hole 202 is provided with a thread. The top section of each support column 3 is provided with a thread. After the top section is screwed through the corresponding third mounting hole (202), it is fixed with a nut, so that the fixing plate 2 carrying the hydraulic jack 1 is fixed to the top of the engine frame by the support column 3.

[0030] like Figure 8 The bottom of the support column 3 is designed to be trumpet-shaped and its end face is straight, so that the hydraulic jack can smoothly lower and lift above the engine frame.

[0031] The working principle of this utility model:

[0032] like Figure 1 and Figure 2 The installation steps are as follows: First, screw each support column 3 into the third mounting hole 202 of the fixing plate 2, then connect it to the fixing plate 2 with two nuts, adjust the height of the fixing plate 2 on the support column 3 to ensure the relative level of the fixing plate 2, and then fix the hydraulic jack 1 on the fixing plate 2 and place it on the end face of the engine frame. Then connect the pull rod 6 to the output shaft of the hydraulic jack 1 through the connecting pipe 4. Then install the two fixing seats 7 on the position of the flat 501 of the pull rod 5 through the pin shaft 8 with a hole, and use the gasket and the cotter pin 10 to ensure that the fixing seat 7 will not fall and can rotate normally. Finally, select the appropriate pull plate 6 according to the cylinder sleeve 11 that needs to be disassembled, and then install a pressure plate 9 to ensure uniform force. Then fix the pull plate 6 and the pressure plate 9 to the fixing seat 7 with bolts, gaskets and nuts, and then complete the overall installation of the device.

[0033] The disassembly steps are as follows: The pull plate 6 is erected. Due to its own weight (its center of gravity is slightly offset from its center), it forms a certain inclination angle with the inner circle of the cylinder liner 11. Because the pull plate 6 is trimmed in advance, it can pass through the inner circle of the cylinder liner 11. Then, by controlling the output shaft 101 of the hydraulic jack 1 to move straight down, the pull rod 6 is lowered so that the pull plate 6 finally passes through the cylinder liner 11. Due to the deadweight of the pull plate 6, it rotates to a nearly horizontal state. Because the pull plate 6 is selected according to the size of the cylinder liner 11, it can ensure that the pull plate 6 contacts the bottom of the cylinder liner 11. Then, the hydraulic jack 1 is started to pull the cylinder liner 11 upward, thereby removing the cylinder liner 11.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cylinder liner disassembly device, characterized by: The invention comprises a hydraulic jack (1), a fixing plate (2), a support column (3), a connecting pipe (4), a pull rod (5), a pull plate (6) and a fixing seat (7), wherein the fixing plate (2) is horizontally fixed to the upper part of the engine frame by the support column (3), the hydraulic jack (1) is fixed on the top of the fixing plate (2), a through hole (201) is provided in the middle of the fixing plate (2) for the output shaft (101) of the hydraulic jack (1) to pass vertically, the output shaft (101) is connected to one end of the pull rod (5) through the connecting pipe (4), and the other end of the pull rod (5) is constructed with a wash flat (5 01), the axis of the fixing seat (7) and the washer (501) are both provided with pin holes horizontally, and the pin shaft (8) passes through the pin holes and is axially limited by washers and cotter pins (10), so that the fixing seat (7) and the washer (501) are rotatably connected, and the pull plate (6) and the fixing seat (7) are both provided with screw holes, and the pull plate (6) is fixed to the fixing seat (7) by a bolt structure, and the pull plate (6) can rotate to a nearly horizontal position by its own weight after passing through the inner wall of the cylinder sleeve (11), and then when the pull plate (6) is pulled up, its outer edge can hold up the bottom of the cylinder sleeve (11).

2. The cylinder liner disassembly device according to claim 1, characterized in that: The axial cross-section of the cylinder sleeve (11) is circular, and the shape of the pull plate (6) is a cut concentric circle (601), the diameter of the concentric circle (601) is between the inner diameter and the outer diameter of the cylinder sleeve (11), and two parallel edges (602) are cut symmetrically about the center of the concentric circle (601), and the distance between the two parallel edges (602) is smaller than the inner diameter of the cylinder sleeve (11). After the pull plate (6) passes through the inner wall of the cylinder sleeve (11) along the direction of its parallel edge (601), it rotates to a nearly horizontal position by its own weight. Thereafter, when the pull plate (6) is pulled up, its outer edge can support the bottom of the cylinder sleeve (11).

3. The cylinder liner disassembly device according to claim 2, characterized in that: The pull plate (6) is provided with four first mounting holes (603), which are uniformly arranged circumferentially about the center of the concentric circle (601), and the connecting lines of the two groups of non-diagonal first mounting holes (603) are both arranged parallel to the parallel edge (602). The number of the fixing seats (7) is two, and they all have the same structure. The pin holes at their axis are connected to the two sides of the pin holes of the wash flat (501) through the pin shaft (8). Each fixing seat (7) is also provided with two countersunk holes (701) perpendicular to its axis. A pressing plate (9) is also provided between the pull plate (6) and the fixing seat (7). The pressing plate (9) is provided with four second mounting holes (901). Each first mounting hole (603), second mounting hole (901) and countersunk hole (701) are arranged in a corresponding manner. After the bolts are screwed through the corresponding holes, the pull plate (6), the pressing plate (9) and the fixing seat (7) are connected in sequence.

4. The cylinder liner disassembly device according to claim 1, characterized in that: The output shaft (101) is provided with a thread, one end of the pull rod (5) is provided with a thread, and the inner wall of the connecting pipe (4) is provided with a thread, and its two ends are respectively threadedly connected to the output shaft (101) and one end of the pull rod (5).

5. The cylinder liner disassembly device according to claim 1, characterized in that: There are three support columns (3) with the same structure. Three third mounting holes (202) are evenly arranged along the outer edge of the fixing plate (2). The inner wall of each third mounting hole (202) is provided with a thread. The top section of each support column (3) is provided with a thread. After the top section is screwed through the corresponding third mounting hole (202), it is fixed with a nut.

6. The cylinder liner disassembly device according to claim 5, characterized in that: The bottom of the support column (3) is trumpet-shaped and its end surface is straight.

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