CN220705817U

CN220705817U - Lightweight aluminum alloy piston

Info

Publication number: CN220705817U
Application number: CN202322522785.6U
Authority: CN
Inventors: 吴昌新; 覃始华
Original assignee: Jiangsu Piston Locomotive Technology Co ltd
Current assignee: Jiangsu Piston Locomotive Technology Co ltd
Priority date: 2023-09-18
Filing date: 2023-09-18
Publication date: 2024-04-02
Anticipated expiration: 2033-09-18

Abstract

The utility model discloses a lightweight aluminum alloy piston, which comprises a piston head and a piston skirt, wherein a first groove and a second groove are sequentially formed in the outer side of the piston head, a first steel sheet is embedded in the bottom of the piston skirt, a pin seat is arranged on the inner side of the piston skirt, a second steel sheet is embedded in the inner side of the pin seat, a plurality of fins are arranged on the outer side of the piston skirt, and a plurality of heat dissipation holes are formed in the piston skirt. According to the utility model, the fins can increase the contact area between the skirt part of the piston and air, so that heat is rapidly dissipated, meanwhile, the heat dissipation holes can accelerate the air circulation, the heat dissipation efficiency is greatly improved, the piston is prevented from being blocked due to thermal expansion, then the first steel sheet and the second steel sheet can greatly reduce the thermal expansion of the skirt part of the aluminum alloy, the piston is further prevented from being blocked due to thermal expansion, and the heat expansion prevention effect is excellent.

Description

Lightweight aluminum alloy piston

Technical Field

The utility model relates to the technical field of aluminum alloy pistons, in particular to a lightweight aluminum alloy piston.

Background

The aluminum alloy piston is an important part of an automobile, the aluminum alloy piston takes low-plasticity casting aluminum alloy as a matrix material, and arsenic-rich mixed rare earth elements and Sn, pb, zn, cr and T i trace metal elements accounting for 0.8-1.4% of the alloy are added into the components of the aluminum alloy piston. In the smelting process, the rare earth element and the alloy element interact to generate a plurality of rare earth compound strengthening phases, so that the alloy structure is uniform, the crystal grains are refined, the crystal boundary is strengthened, the linear expansion coefficient is reduced, the strength and the hardness are obviously improved, and the volume stability and the cutting processability are enhanced.

The patent with publication number CN2660144Y, which is searched, discloses an aluminum alloy piston, the content of which describes that "the top, the head and the skirt of the piston are provided with a protective layer, which is a ceramic coating layer (4); a transition zone (6) is provided between the ceramic coating (4) and the aluminum alloy base body (5) of the piston. The ceramic coating layer on the surfaces of the head and the skirt of the piston is divided into an inner layer and an outer layer, the inner layer is compact in structure, and the outer layer is full of micropores. The protective layers at the two parts have good lubricating performance and the property of storing lubricating oil; in addition to its high microhardness, the protective layer at both locations has excellent wear resistance. The protective layer also has excellent heat insulation and mechanical strength, so that the piston can withstand larger high-temperature and high-pressure impacts, and meanwhile, the matching precision between the piston and the cylinder wall can be maintained for a long time. Therefore, the piston has long service life … … ", and the aluminum alloy piston has poor heat dissipation effect, is not easy to use in an environment with abnormal high temperature, has small application range and has certain defects.

Disclosure of Invention

The present utility model is directed to solving the problems of the prior art or related art.

The technical scheme adopted by the utility model is as follows: the utility model provides a lightweight aluminum alloy piston, includes piston head and piston skirt, first recess and second recess have been set gradually in the outside of piston head, the bottom of piston skirt has inlayed first steel sheet, the inboard of piston skirt is provided with the keyway, the inboard of keyway has inlayed the second steel sheet, the outside of piston skirt is provided with a plurality of fin, a plurality of louvre has been seted up on the piston skirt.

Preferably, two first grooves are formed, wear-resistant layers are arranged on the inner sides of the two first grooves, and the wear-resistant layers are alumina ceramic layers.

Preferably, a through hole is formed in the inner wall of the second groove.

Preferably, two first steel sheets are arranged and symmetrically distributed.

Preferably, the pin seat is provided with a pin hole.

Preferably, a plurality of fins and the piston skirt are of an integrated structure and are distributed at equal intervals.

By adopting the technical scheme, the beneficial effects obtained by the utility model are as follows: the utility model discloses the fin of setting can increase piston skirt and air's area of contact to quick heat dissipation, the louvre that sets up simultaneously can accelerate the velocity of circulation of air, has improved radiating efficiency greatly, avoids the piston to block because of the thermal expansion, and then the first steel sheet and the second steel sheet that set up can reduce aluminum alloy skirt's thermal expansion volume greatly, can avoid further the piston to block because of the thermal expansion, and the thermal expansion prevention effect is all good.

Drawings

FIG. 1 is a schematic view of a view angle structure of the present utility model;

FIG. 2 is a schematic view of another view of the present utility model;

fig. 3 is a schematic view of the structure of the piston head of the present utility model.

Reference numerals:

100. a piston head; 110. a first groove; 111. a wear-resistant layer; 120. a second groove;

200. a piston skirt; 210. a first steel sheet; 220. a pin base; 230. a second steel sheet; 240. a pin hole; 250. a fin; 260. and the heat dissipation holes.

Detailed Description

The objects, technical solutions and advantages of the present utility model will become more apparent by the following detailed description of the present utility model with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

Some embodiments of the present utility model are described below with reference to the accompanying drawings to provide a lightweight aluminum alloy piston.

Examples:

referring to fig. 1-3, a first embodiment of the present utility model provides a lightweight aluminum alloy piston including a piston head 100 and a piston skirt 200.

Specifically, the outside of piston head 100 has set gradually first recess 110 and second recess 120, and first recess 110 is provided with two, and two first recesses 110 mountable gaseous rings, and the inboard of two first recesses 110 all is provided with wearing layer 111, and wearing layer 111 is the aluminium oxide ceramic layer, and the aluminium oxide ceramic layer has wear-resisting function, can reduce wearing and tearing, prolongs the life of piston, and the through-hole has been seted up to the inner wall of second recess 120, and second recess 120 mountable oil ring.

Specifically, the bottom of the piston skirt 200 is embedded with the first steel sheet 210, the inner side of the piston skirt 200 is provided with the pin seat 220, the pin seat 220 is provided with the pin holes 240, the pin holes 240 can be used for installing a piston shaft so as to fix a connecting rod, the inner side of the pin seat 220 is embedded with the second steel sheet 230, the outer side of the piston skirt 200 is provided with a plurality of fins 250, the contact area between the piston skirt 200 and air can be greatly increased by the plurality of fins 250, the larger the contact area is, the faster the heat conduction is, the heat dissipation is realized, the piston skirt 200 is provided with a plurality of heat dissipation holes 260, the speed of air circulation can be accelerated by the plurality of heat dissipation holes 260, the heat dissipation efficiency is further improved, the first steel sheet 210 is provided with two first steel sheets 210 which are symmetrically distributed, the expansion coefficient of the first steel sheet 210 and the second steel sheet 230 is small, the thermal expansion amount of the aluminum alloy skirt 200 can be reduced, the piston is prevented from being clamped due to thermal expansion, and the plurality of fins 250 and the piston skirt 200 are in an integrated structure and are distributed at equal intervals.

The working principle and the using flow of the utility model are as follows: when the heat dissipation device is used, the contact area between the piston skirt 200 and air can be greatly increased by the fins 250, the larger the contact area is, the faster the heat conduction is, so that the heat dissipation is performed quickly, then the air circulation speed can be increased through the heat dissipation holes 260, the heat dissipation efficiency is further improved, the piston is prevented from being blocked due to thermal expansion, then the thermal expansion amount of the aluminum alloy skirt 200 can be greatly reduced through the first steel sheet 210 and the second steel sheet 230, the piston is further prevented from being blocked due to thermal expansion, and the heat expansion prevention effect is excellent.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A lightweight aluminum alloy piston, comprising:

the piston comprises a piston head (100), wherein a first groove (110) and a second groove (120) are sequentially formed in the outer side of the piston head (100);

the piston skirt (200), first steel sheet (210) has been inlayed to the bottom of piston skirt (200), the inboard of piston skirt (200) is provided with keyway (220), second steel sheet (230) has been inlayed to the inboard of keyway (220), the outside of piston skirt (200) is provided with a plurality of fin (250), a plurality of louvre (260) have been seted up on piston skirt (200).

2. The lightweight aluminum alloy piston as claimed in claim 1, wherein two first grooves (110) are provided, and wear-resistant layers (111) are provided on inner sides of the two first grooves (110), and the wear-resistant layers (111) are alumina ceramic layers.

3. The lightweight aluminum alloy piston as claimed in claim 1, wherein the inner wall of the second groove (120) is provided with a through hole.

4. The lightweight aluminum alloy piston as claimed in claim 1, wherein two of said first steel plates (210) are provided, and two of said first steel plates (210) are symmetrically distributed.

5. The lightweight aluminum alloy piston as claimed in claim 1, wherein said pin bosses (220) are formed with pin bores (240).

6. A lightweight aluminium alloy piston according to claim 1, wherein a number of said fins (250) are of unitary construction with the piston skirt (200) and are equally spaced.