Disassembling tool for compressor crank of two-stroke heavy oil engine

Abstract

The utility model discloses a disassembling tool for a compressor crank of a two-stroke heavy oil engine. The disassembling tool comprises a crankshaft assembly, the compressor crank, a drawing sleeve, a U-shaped limiting plate and a limiting handle. The compressor crank is characterized in that the compressor crank is mounted on the crankshaft assembly through a flat key, fixing glue, a gasket and a screw 1; the limiting handle is connected with the crankshaft assembly through a screw 2 to prevent the crankshaft assembly from rotating; the screw 3 is mounted on a crankshaft assembly after the gasket and the screw 1 are dismounted, so that threads are prevented from being damaged when the compressor crank is dismounted; the drawing sleeve and the U-shaped limiting plate are connected through a screw 4 to clamp the compressor crank; and the screw 5 is matched with the drawing sleeve to pull out the compressor crank. By the adoption of the two-stroke heavy oil engine compressor crank disassembling tool, the compressor crank can be disassembled in a lossless mode, and the tool has the advantages of being simple in structure, convenient and fast to operate, low in manufacturing cost and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of the maintenance of small two-stroke heavy oil engines, and specifically refers to a disassembly tool for a compressor crank of a two-stroke heavy oil engine. Background Technique

[0002] The small two-stroke heavy oil engine is an important power type of the unmanned aerial vehicle system, and higher requirements for the maintainability of the engine are put forward during the production and trial manufacture of the engine. As an important part of the small two-stroke heavy oil engine, the air supply system is installed on the crankshaft assembly through a compressor crank to drive the connecting rod to transmit power to drive the compressor piston to pump air. In the initial stage of engine trial manufacture, disassembly and assembly are inevitable; when the crankcase leaks oil, the whole engine needs to be disassembled and repaired again. When disassembling the whole engine, the compressor crank must be disassembled; the compressor crank is installed on the crankshaft assembly through a flat key, retaining glue, gasket, and screw. After the retaining glue is completely cured, the fitting form between the compressor crank and the crankshaft assembly changes from clearance fit to interference fit, and a special tool must be used to disassemble the compressor crank.

[0003] In view of the above problems, the present invention provides a disassembly tool for a compressor crank of a two-stroke heavy oil engine. Summary of the Invention

[0004] The purpose of the present invention is to provide a disassembly tool for a compressor crank of a two-stroke heavy oil engine with a simple structure, convenient operation, and low manufacturing cost, so as to realize the non-destructive disassembly of the compressor crank.

[0005] The main parts of the disassembly tool for the compressor crank of the two-stroke heavy oil engine are a drawing sleeve, a U-shaped limit plate, and a limit handle; the drawing sleeve and the U-shaped limit plate clamp the compressor crank through screw 4 to fix the compressor crank; the limit handle is connected to the crankshaft assembly through screw 2 to prevent the crankshaft assembly from rotating.

[0006] Preferably, for the disassembly tool for the compressor crank of the two-stroke heavy oil engine, the drawing sleeve and the U-shaped limit plate clamp the compressor crank in the axial direction through screw 4 to avoid scratching the mating surface and realize the non-destructive disassembly of the compressor crank.

[0007] Preferably, screw 3 is installed on the crankshaft assembly to avoid damage to the threaded hole on the crankshaft assembly when screw 5 is tightened.

[0008] Preferably, the limit handle is provided with a handle and six through holes 1. The six through holes 1 realize the connection between the limit handle and the crankshaft assembly. Holding the handle by hand can prevent the crankshaft assembly from rotating and further offset the torque generated when screw 5 is tightened.

[0009] Preferably, the U-shaped limiting plate is provided with a U-shaped opening and two threaded holes 1. The U-shaped opening is used to avoid the crankshaft, and the two threaded holes 1 are used to connect the U-shaped limiting plate to the pulling sleeve.

[0010] Preferably, the pulling sleeve is provided with an avoidance hole, two through holes 2, and a threaded hole 2. The avoidance hole is used to avoid the screw 3, the two through holes 2 are used to connect the pulling sleeve to the U-shaped limiting plate, and the threaded hole 2 cooperates with the screw 5 to pull the compressor crank.

[0011] Beneficial effects

[0012] The structure of the present invention is reasonably designed, and the beneficial effects are that the compressor crank can be quickly and effectively disassembled from the crankshaft assembly; the structure is simple and the operation is convenient, greatly improving the disassembly speed of the compressor crank; the problem of difficult disassembly of the compressor crank is solved, the disassembly damage rate of the compressor crank is reduced, the non-destructive disassembly of the compressor crank is realized, and the maintenance time of the engine is effectively reduced. Description of the drawings

[0013] Figure 1 It is an assembly drawing of the compressor crank;

[0014] Figure 2 It is an installation schematic diagram of the present utility model;

[0015] Figure 3 It is a schematic diagram of the limiting handle;

[0016] Figure 4 It is a schematic diagram of the U-shaped limiting plate;

[0017] Figure 5 It is a schematic diagram of the pulling sleeve.

[0018] In the figure:

[0019] 1 - crankshaft assembly 2 - compressor crank 3 - gasket

[0020] 4 - screw 1 5 - limiting handle 51 - handle

[0021] 52 - through hole 1 6 - screw 2 7 - U-shaped limiting plate

[0022] 71 - U-shaped opening 72 - threaded hole 1 8 - screw 3

[0023] 9 - pulling sleeve 91 - avoidance hole 92 - through hole 2

[0024] 93 - threaded hole 2 10 - screw 4 11 - screw 5 Specific embodiments

[0025] The specific embodiments of the present invention are further described in detail below with reference to the drawings.

[0026] The basic idea of the present invention is to combine a removal tool for the compressor crank of a two-stroke heavy oil engine to achieve the non-destructive removal of the compressor crank.

[0027] As Figure 3 、 Figure 4 、 Figure 5 shown, a removal tool for the compressor crank of a two-stroke heavy oil engine mainly consists of a limit handle 5, a U-shaped limit plate 7, and a pulling sleeve 9. The main structure of the limit handle 5 includes a handle 51 and a through hole 152. The main structure of the U-shaped limit plate 7 includes a U-shaped opening 71 and a threaded hole 172. The main structure of the pulling sleeve 9 includes an avoidance hole 91, a through hole 292, and a threaded hole 293.

[0028] As Figure 1 、 Figure 2 shown, in this example, the compressor crank 2 is installed on the crankshaft assembly 1 through a flat key, holding glue, a gasket 3, and a screw 14. The removal steps of the compressor crank 2 are as follows: First, install the limit handle 5 on the crankshaft assembly 1 using the screw 26. Fix the crankshaft assembly 1 with the limit handle 5, remove the screw 14 and the gasket 3, and then install the screw 38. Clamp the compressor crank 2 using the screw 410, the U-shaped limit plate 7, and the pulling sleeve 9. Install the screw 511 into the threaded hole 293 of the pulling sleeve 9, and tighten the screw 511 to pull out the U-shaped limit plate 7, the compressor crank 2, and the pulling sleeve 9 together from the crankshaft assembly 1.

[0029] Working principle:

[0030] As Figures 1 to 5 shown, the limit handle 5 is connected to the crankshaft assembly 1 through the through hole 152 and the screw 26, and the rotation of the crankshaft assembly 1 is restricted by the handle 51. The screw 38 is installed on the crankshaft assembly 1 after removing the screw 14 and the gasket 3 to prevent damage to the thread on the crankshaft assembly 1 when tightening the screw 511 to pull out the U-shaped limit plate 7, the compressor crank 2, and the pulling sleeve 9 together from the crankshaft assembly 1. The U-shaped limit plate 7 avoids the crankshaft assembly 1 through the U-shaped opening 71 to prevent the crankshaft assembly 1 from being scratched; it is connected to the pulling sleeve 9 through the threaded hole 172 and the screw 410 to clamp the compressor crank 2. The pulling sleeve 9 is connected to the U-shaped limit plate 7 through the through hole 292 and the screw 410 to clamp the compressor crank 2; it avoids the screw 38 through the avoidance hole 91; and it cooperates with the screw 511 through the threaded hole 293 to achieve the purpose of pulling out the U-shaped limit plate 7, the compressor crank 2, and the pulling sleeve 9 together from the crankshaft assembly 1. Thus, the non-destructive removal of the compressor crank 2 is completed.

[0031] The above embodiments are only descriptions of the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made to the technical solution of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A compressor crank removal tool for a two-stroke heavy oil engine, characterized in that It mainly consists of a limit handle (5), a U-shaped limit plate (7), and a drawing sleeve (9). The limit handle (5) mainly has a handle (51) and a through hole 1 (52) in terms of its structure; the U-shaped limit plate (7) mainly has a U-shaped opening (71) and a threaded hole 1 (72) in terms of its structure; the drawing sleeve (9) mainly has an avoidance hole (91), a through hole 2 (92), and a threaded hole 2 (93) in terms of its structure. After the limit handle (5) is connected to the crankshaft assembly (1) by a screw 2 (6), the rotation of the crankshaft assembly (1) is prevented by holding the handle (51) by hand; the U-shaped limit plate (7) avoids the crankshaft assembly (1) through the U-shaped opening (71) and is connected to the drawing sleeve (9) through the threaded hole 1 (72); the drawing sleeve (9) avoids the screw 3 (8) through the avoidance hole (91), is connected to the U-shaped limit plate (7) through the through hole 2 (92), and realizes drawing in cooperation with the screw 5 (11); the U-shaped limit plate (7) and the drawing sleeve (9) clamp the compressor crank (2) in the axial direction by a screw 4 (10), and the drawing of the compressor crank (2) is realized when the screw 5 (11) is tightened.

2. A compressor crank removal tool for a two-stroke heavy oil engine according to claim 1, characterized in that The limit handle (5) is fixed on the crankshaft assembly (1), effectively preventing the crankshaft assembly (1) from rotating when removing the screw 1 (4), tightening the screw 3 (8), and tightening the screw 5 (11).

3. A compressor crank removal tool for a two-stroke heavy oil engine according to claim 1, characterized in that The screw 3 (8) is installed on the crankshaft assembly (1) after removing the screw 1 (4) and the gasket (3), effectively preventing damage to the threads of the crankshaft assembly (1) when tightening the screw 5 (11) to realize the drawing of the compressor crank (2).

4. A compressor crank removal tool for a two-stroke heavy oil engine according to claim 1, characterized in that The U-shaped limit plate (7) clamps the compressor crank (2) in cooperation with the drawing sleeve (9) in the axial direction, effectively preventing the mating surfaces of the crankshaft assembly (1) and the compressor crank (2) from being pinched during disassembly.

5. A compressor crank removal tool for a two-stroke heavy oil engine according to claim 1, characterized in that After the drawing sleeve (9) clamps the compressor crank (2) in cooperation with the U-shaped limit plate (7) in the axial direction, it then cooperates with the screw 5 (11) to realize the drawing of the compressor crank (2), thereby realizing the non-destructive disassembly of the compressor crank (2).

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