A kind of lifting tool for disassembling piston

Abstract

The present invention discloses a piston disassembling lifting tool, which belongs to the field of piston lifting tools, and solves the problem that the hook of the existing lifting tool is not convenient to insert into the piston combustion chamber. It includes a split-type connecting plate and a lifting plate, and the lifting plate is evenly provided with a plurality of open slots, and a hook is hinged in the open slot through a hinge shaft, and the distance of the hinge shaft relative to the outer edge of the hook is smaller than the distance relative to the inner edge of the hook, and a gap is provided between the inner edge of the hook and the inner side wall of the open slot so that the inner edge of the hook is eccentrically fitted in the inner side wall of the open slot under the action of gravity, and a hook is fixed at the center of the connecting plate, one end of the hook passes through the connecting plate, and one end of the hook is provided with an external thread, and a threaded hole compatible with the external thread is provided at the center of the lifting plate. The piston disassembling lifting tool of the present invention is convenient for quickly inserting the hook into the combustion chamber, and effectively improves work efficiency.

Description

Technical Field

[0001] The invention relates to a piston hoisting tool, and more particularly to a piston disassembling hoisting tool. Background Art

[0002] The piston is a reciprocating part in the cylinder block of a car engine. The basic structure of the piston can be divided into the top, the head and the skirt. The top of the piston is the main part of the combustion chamber, and its shape is related to the selected combustion chamber form. Gasoline engines mostly use flat-top pistons, which have the advantage of a small heat absorption area. There are often various pits on the top of the diesel engine piston, and their specific shape, position and size must be adapted to the requirements of the diesel engine's mixture formation and combustion. Most of the existing piston top cavities are provided with a limit portion (i.e., a shrinkage), such as the patent number: CN202120499524.5, a new type of gas engine piston.

[0003] The piston plays an extremely important role when the engine is started. The piston is used to withstand the gas pressure and drive the crankshaft to rotate through the piston pin. As the central part of the automobile engine, the piston has increasingly strict assessment and evaluation requirements. The disassembly and assembly of the piston during the test is subject to the limitations of the piston design. It is difficult to remove the piston during the disassembly and inspection process, which is very easy to cause the piston to fall, bump and other damages, seriously affecting the reuse of the piston and even affecting the progress of product development. For the removal of the piston, the traditional method is for the operator to reach his hand under the piston in the crankcase and use a wooden stick to push the piston upward from the cylinder. This method is very unsafe and labor-intensive. The strength of disassembling the piston varies from person to person and is difficult to grasp. It is easy to damage the piston, especially when the piston bites the cylinder, the piston is stuck in the gas canopy, and it will be very difficult to disassemble the piston. At the same time, due to insufficient protection during the disassembly process, it is easy to cause safety hazards to the disassembly personnel, which brings inconvenience to the disassembly process and has been gradually eliminated.

[0004] At present, for the disassembly of the piston, tooling is usually used to assist in disassembly, such as the piston lifting tool with patent number: CN202022509146.2. The lifting tool moves on the side support rod so that the hook can be hung on the piston combustion chamber, and the support rod is inserted into the combustion chamber of the piston by rotating the support rod, and the lifting tool body and the piston are moved relative to each other, so that the hook generates a force to pull the piston upward, so that the piston can be moved by moving the piston lifting tool, so as to facilitate the installation of the piston into the cylinder liner or removal from the cylinder liner. However, the existing auxiliary disassembly tools need to move the position of the hook before inserting the hook into the piston combustion chamber so that the hook can be inserted into the combustion chamber. Such operation is cumbersome and reduces work efficiency. Therefore, it is urgent to develop and design a new type of piston disassembly lifting tool. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a piston disassembly lifting tool for the above-mentioned deficiencies in the prior art, which is convenient for quickly inserting the hook into the combustion chamber and effectively improves work efficiency.

[0006] The technical solution of the present invention is as follows: a piston disassembly lifting tool, comprising a connecting plate and a lifting plate arranged in a split manner, a plurality of open grooves are evenly opened on the lifting plate, a hook is hinged in the open groove through a hinge shaft, the distance of the hinge shaft relative to the outer edge of the hook is smaller than the distance relative to the inner edge of the hook, and a gap is provided between the inner edge of the hook and the inner side wall of the open groove so that the inner edge of the hook can be eccentrically fitted in the inner side wall of the open groove under the action of gravity, a hook is fixed at the center of the connecting plate, one end of the hook passes through the connecting plate, and one end of the hook is provided with an external thread, and a threaded hole matching the external thread is provided at the center of the lifting plate.

[0007] As a further improvement, the hanging plate includes a mounting plate and a plurality of connecting rods, the plurality of connecting rods are fixed at the bottom of the mounting plate, the opening grooves and threaded holes penetrate the mounting plate and the connecting rods, one end of the connecting rod extends to the outside of the mounting plate, and the hinge shaft is located on the connecting rod outside the mounting plate.

[0008] Furthermore, the mounting plate and the plurality of connecting rods are an integrally formed structure.

[0009] Furthermore, the hook is L-shaped, and the hinge axis is located on one side of the L-shaped hook.

[0010] Furthermore, chamfers are provided on both upper and lower sides of the outer edge of the hook, and the two chamfers are connected by rounded corners.

[0011] Furthermore, the distance of the hinge shaft relative to the top of the hook matches the distance relative to the top of the hanging plate.

[0012] Beneficial Effects

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The piston disassembling lifting tool of the present invention is provided with a split connecting plate and a lifting plate, and an eccentrically hinged hook is connected to the outer periphery of the lifting plate. When lifting the piston, one of the hooks of the lifting plate is first inserted into the combustion chamber at an angle. After one of the hooks is inserted into the combustion chamber of the piston, the lifting plate is adjusted to a horizontal state. Since the hook is eccentrically installed, the outer edge of the hook is warped, so that the diameter corresponding to the outer edge of the hook becomes smaller, and multiple hooks are easily inserted into the combustion chamber. After the lifting plate is adjusted, the hook is threadedly connected to the threaded hole so that the connecting plate is pressed against the top surface of the lifting plate, and then the hook is pulled upward. At this time, the outer edge of the hook contacts the shrinkage of the piston combustion chamber and is adjusted to a horizontal state, and under the limiting action of the connecting plate, it can no longer be turned over. At this time, the crane can be used to hook the hook and pull the lifting tool to pull out the piston. The lifting tool is convenient for quickly inserting the hook into the combustion chamber, effectively improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the cooperation between the hanging plate and the hook in the present invention;

[0017] Figure 3 It is a structural schematic diagram of the hook in the present invention;

[0018] Figure 4 It is a structural schematic diagram of the hanging plate in the present invention;

[0019] Figure 5 It is a structural schematic diagram of the present invention when applied.

[0020] Among them: 1-connecting plate, 2-lifting plate, 3-opening groove, 4-hinge shaft, 5-hook, 6-lifting hook, 7-threaded hole, 8-chamfer, 9-rounded corner, 10-piston, 21-mounting plate, 22-connecting rod. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0022] See also Figure 1-5A piston disassembly lifting tool of the present invention comprises a connecting plate 1 and a lifting plate 2 which are arranged in a split manner, that is, the connecting plate 1 and the lifting plate 2 are two independent parts, which are detachable, and a plurality of opening grooves 3 are evenly opened on the lifting plate 2, and the opening grooves 3 are grooves radially extending inward from the outer edge of the lifting plate 2, and a hook 5 is hinged in the opening groove 3 through a hinge shaft 4, wherein the distance between the hinge shaft 4 and the outer edge of the hook 5 is smaller than the distance between the hinge shaft 4 and the inner edge of the hook 5, that is, the hook 5 is eccentrically hinged, A gap is provided between the inner edge of the hook 5 and the inner wall of the opening groove 3 so that the inner edge of the hook 5 can be eccentrically fitted in the inner wall of the opening groove 3 under the action of gravity, which can prevent the hook 5 from flipping over to a vertical state. A hook 6 is fixed at the center of the connecting plate 1. The hook 6 is used to connect with the crane. One end of the hook 6 passes through the connecting plate 1, and one end of the hook 6 is provided with an external thread. A threaded hole 7 compatible with the external thread is provided in the center of the lifting plate 2. The hook 6 can be threadedly connected to the threaded hole 7 through the external thread to form a whole.

[0023] The piston disassembling lifting tool of the present invention is provided with a split connecting plate 1 and a lifting plate 2, and a hook 5 is eccentrically hinged on the outer periphery of the lifting plate 2. When the piston 10 is lifted, one of the hooks 5 of the lifting plate 2 is first inserted into the combustion chamber obliquely. After one of the hooks 5 is inserted into the combustion chamber of the piston, the lifting plate 2 is oriented to be horizontal. Since the hook 5 is eccentrically installed, the outer edge of the hook 5 is warped, so that the diameter corresponding to the outer edge of the hook 5 becomes smaller, and multiple hooks 5 are easily inserted into the combustion chamber. When the lifting plate 2 is oriented, the hook 6 is threadedly connected to the threaded hole 7, so that the connecting plate 1 is pressed against the top surface of the lifting plate 2, and then the hook 6 is pulled upward. At this time, the outer edge of the hook 5 contacts the shrinkage of the piston combustion chamber and is oriented to be horizontal, and under the limiting action of the connecting plate 1, it cannot be turned over again. At this time, the crane can be used to hook the hook 6 and pull the lifting tool to pull out the piston. The lifting tool is convenient for quickly inserting the hook into the combustion chamber, effectively improving work efficiency.

[0024] Preferably, the hanging plate 2 includes a mounting plate 21 and a plurality of connecting rods 22, wherein the plurality of connecting rods 22 are fixed at the bottom of the mounting plate 21, the opening grooves 3 and the threaded holes 7 penetrate the mounting plate 21 and the connecting rods 22, one end of the connecting rod 22 extends to the outside of the mounting plate 21, and the hinge shaft 4 is located on the connecting rod 22 on the outside of the mounting plate 21. The hanging plate 2 adopts the form of a combination of the mounting plate 21 and the connecting rod 22, which can effectively reduce its weight and is more conducive to manually taking the hanging plate 2 and inserting it into the combustion chamber of the piston.

[0025] Preferably, the mounting plate 21 and the plurality of connecting rods 22 are integrally formed, which is easy to manufacture and can improve the structural strength of the hanging plate 2 .

[0026] Preferably, the hook 5 is L-shaped, wherein the hinge shaft 4 is located on one side of the L-shaped hook 5. The L-shaped hook allows the hook 5 to fit onto the inner wall of the opening slot 3 without being flipped over to a vertical state.

[0027] Preferably, chamfers 8 are provided on both upper and lower sides of the outer edge of the hook 5 , and the two chamfers 8 are connected by a rounded corner 9 to prevent the outer edge of the hook 5 from scratching the combustion chamber.

[0028] Preferably, the distance of the hinge shaft 4 relative to the top of the hook 5 is adapted to the distance relative to the top of the hanging plate 2, so that after the connecting plate 1 presses the hanging plate 2, the hook 5 is in a horizontal state, thereby improving the stability of the hook 5's grip on the piston combustion chamber and preventing the hook from loosening.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A piston disassembly lifting tool, characterized in that: The invention comprises a connecting plate (1) and a hanging plate (2) which are arranged in a split manner. The hanging plate (2) is evenly provided with a plurality of open grooves (3). A hook (5) is hinged in the open groove (3) via a hinge shaft (4). The distance between the hinge shaft (4) and the outer edge of the hook (5) is smaller than the distance between the hinge shaft (4) and the inner edge of the hook (5). A gap is provided between the inner edge of the hook (5) and the inner side wall of the open groove (3) so that the inner edge of the hook (5) is eccentrically fitted in the inner side wall of the open groove (3) under the action of gravity. A hanging hook (6) is fixed at the center of the connecting plate (1). One end of the hanging hook (6) passes through the connecting plate (1). One end of the hanging hook (6) is provided with an external thread. A threaded hole (7) matching the external thread is provided at the center of the hanging plate (2).

2. The piston disassembly lifting tool according to claim 1, characterized in that: The hanging plate (2) comprises a mounting plate (21) and a plurality of connecting rods (22), wherein the plurality of connecting rods (22) are fixed to the bottom of the mounting plate (21), the opening grooves (3) and the threaded holes (7) penetrate the mounting plate (21) and the connecting rods (22), one end of the connecting rod (22) extends to the outside of the mounting plate (21), and the hinge shaft (4) is located on the connecting rod (22) outside the mounting plate (21).

3. The piston disassembly lifting tool according to claim 2, characterized in that: The mounting plate (21) and the plurality of connecting rods (22) are an integrally formed structure.

4. The piston disassembly lifting tool according to claim 1, characterized in that: The hook (5) is L-shaped, and the hinge shaft (4) is located on one side of the L-shaped hook (5).

5. The piston disassembly lifting tool according to claim 1, characterized in that: The outer edge of the hook (5) is provided with chamfers (8) on both upper and lower sides, and the two chamfers (8) are connected by a rounded corner (9).

6. A piston disassembly lifting tool according to any one of claims 1 to 5, characterized in that: The distance between the hinge shaft (4) and the top of the hook (5) matches the distance between the hinge shaft (4) and the top of the hanging plate (2).

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