Engine piston

An engine and piston technology, applied in the field of engine component structure design, can solve the problems of heavy piston weight, high piston compression, and difficult processing, and achieve the effects of reducing piston weight, reducing piston compression height, and saving materials

Inactive Publication Date: 2016-02-17
强道前
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides an engine piston, which solves the technical problems of the steel piston in the prior art, the piston is heavy, the processing is difficult, and the compression height of the piston is too high

Method used

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Embodiment 1

[0079] See Figure 5-Figure 12 , these figures provide a schematic structural view of the engine piston of the present embodiment.

[0080] In this embodiment, the piston head 1 and the piston skirt 2 are hinged and fixed to form a three-pin seat hinged piston. The piston in this embodiment preferably adopts a steel top aluminum / iron skirt structure.

[0081] Align the finished piston head 1 with the installation position of the piston skirt 2, and the piston pin passes through the pin seat hole 8 of one side skirt, the pin hole 11 of the middle pin seat 7, and the pin on the other side of the piston skirt 2. The seat hole 8 connects the piston head 1 and the piston skirt 2, and the top end surface of the piston skirt 2 is not in contact with the piston head 1, thus completing the assembly of the three-pin seat articulated piston.

[0082] The piston head 1 is forged, and the ring groove 4, combustion chamber 5, and internal cooling oil passage 6 of the piston head 1 are con...

Embodiment 2

[0086] See Figure 13-Figure 19 , these figures provide a schematic structural view of the engine piston of the present embodiment.

[0087] In this embodiment, the piston head 1 and the piston skirt 2 are friction welded to form a three-pin seat integral piston. In this embodiment, the piston preferably adopts an all-steel structure.

[0088] The three-pin seat integral piston is composed of a piston head 1 and a piston skirt 2, which are connected by friction welding. Align the welding joints 15 of the piston head 1 and the piston skirt 2, and perform friction welding on the piston head 1 and the piston skirt 2 by a friction welding machine, and the piston head 1 and the piston skirt 2 are semi-finished products after welding. Wherein, one end of the piston skirt 2 facing the piston head 1 is provided with an annular connecting portion extending toward the axial direction of the skirt; The ring groove structure; through the friction welding between the connecting part and...

Embodiment 3

[0094] See Figure 20-Figure 27 , these figures provide a schematic structural view of the engine piston of the present embodiment.

[0095] In this embodiment, the piston head 1 and the piston skirt 2 are friction welded to form a three-pin seat elastically articulated piston. The piston in this embodiment preferably adopts a steel top aluminum skirt structure.

[0096] The finished piston head 1 is aligned with the installation position of the piston skirt 2. After the piston head 1 and the piston skirt 2 are connected by pins, the lower end surface of the piston head 1 and the piston skirt 2 There is a gap between the top end faces. Between the piston head 1 and the piston skirt 2 is arranged a belleville spring 3 which is partially elastically deformed in the gap in the axial direction of the piston. The piston pin passes through the pin seat hole 8 of one side skirt, the pin hole 11 of the middle pin seat 7, and the pin seat hole 8 of the other side of the piston skirt...

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Abstract

The invention relates to the technical field of structural design of engine components, in particular to an engine piston. The engine piston comprises a piston head (1) and a piston skirt (2) which are of split structures; an annular groove (4), a burning chamber (5) and an inner cooling oil channel (6) are machined in the piston head (1), and a single middle-mounted pin base (7) is arranged in the middle of a cavity of the piston head (1); a pin hole (11) perpendicular to the axis of the piston head (1) is machined in one end, far away from the piston head (1), of the middle-mounted pin base (7); the piston skirt (2) is in a barrel shape; the middle-mounted pin base (7) of the piston head (1) penetrates the barrel-shaped inner cavity from one end of the piston skirt (2); and the piston skirt (2) relatively penetrates into the middle-mounted pin base (7) in the inner cavity, a pin base hole (8) coaxial with a pin hole (11) of the middle-mounted pin base (7) is formed in the lateral wall, and pin connection of a three-pin-base structure is achieved by the piston head (1) and the piston skirt (2) through the above structure.

Description

technical field [0001] The invention relates to the technical field of structural design of engine components, in particular to an engine piston. Background technique [0002] The function of the piston is to withstand the pressure of the combustion gas and transmit it to the connecting rod through the piston pin to drive the crankshaft to rotate. The top of the piston is also a component of the combustion chamber 500 . [0003] Due to its light weight and high specific strength, lightweight aluminum alloy has been widely used as the preferred material for manufacturing pistons. Pistons made of traditional aluminum alloys such as figure 1 shown. In recent years, due to the continuous improvement of the degree of strengthening of diesel engines and natural gas engines and the increasingly stringent emission requirements (National IV, National V), the piston, as the core component of the engine, bears higher thermal and mechanical loads, so the structure of the piston and Ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00F02F3/22
Inventor 强道前
Owner 强道前
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