CN-224214265-U - Powder metallurgy automobile piston with gradient pore structure

CN224214265UCN 224214265 UCN224214265 UCN 224214265UCN-224214265-U

Abstract

The utility model discloses a powder metallurgy automobile piston with a gradient pore structure, which relates to the technical field of automobile part manufacturing and comprises a cylinder, wherein the outer wall of the cylinder is fixedly connected with a lubricating device, the outer wall of the lubricating device is connected with a movable device in a sliding manner, and the lubricating device discharges oil through the sliding of the movable device; through setting up lubricating arrangement, through seting up S-shaped groove and cooperation spheroidal circumference array arrangement at the barrel inner wall, combine the oil storage characteristic of powder metallurgy gradient pore structure, realized the dynamic self-lubricating in the piston motion process, when movable device slides, the restriction of spheroid limit position strip rotates, forces the directional flow of the lubricating oil in the S-shaped inslot to the piston outer wall, effectively reduces frictional resistance, the spheroid changes traditional sliding friction into rolling friction with the rolling contact design of spacing, the sinuous route in S-shaped groove has prolonged the dwell time of lubricating oil at the piston inside, the purpose of radiating effect has been strengthened.

Inventors

HAN JIAWEI
MENG XIANGYANG
TONG ZHAOYONG
ZHAO QILIANG

Assignees

扬州汇峰新材料有限公司

Dates

Publication Date: 20260508
Application Date: 20250625

Claims (6)

1. The powder metallurgy automobile piston with the gradient pore structure comprises a cylinder body (1) and is characterized in that: The outer wall of the cylinder body (1) is fixedly connected with a lubricating device (2), the outer wall of the lubricating device (2) is connected with a movable device (3) in a sliding manner, and the lubricating device (2) discharges oil through the sliding of the movable device (3); The lubricating device (2) comprises an oil inlet pipe (20), an oil cavity (21) is fixedly connected to the outer wall of the oil inlet pipe (20), and an S-shaped groove (22) is fixedly connected to the output end of the oil cavity (21).
2. The powder metallurgy automobile piston with the gradient pore structure according to claim 1, wherein the outer wall of the oil inlet pipe (20) is fixedly connected with the inner wall of the cylinder body (1), and the oil cavity (21) and the S-shaped groove (22) are formed in the inner wall of the cylinder body (1).
3. The powder metallurgy automobile piston with the gradient pore structure according to claim 1, wherein the inner wall of the S-shaped groove (22) is rotationally connected with a sphere (23), and the inner wall of the S-shaped groove (22) and the outer wall of the sphere (23) are circumferentially arrayed along the central axis of the cylinder (1).
4. A powder metallurgy automobile piston with a gradient pore structure according to claim 3, wherein the outer wall of the sphere (23) is symmetrically contacted with a limit strip (24), the side wall of the limit strip (24) is fixedly connected with the outer wall of the cylinder (1), and the outer wall of the sphere (23) is rotationally connected with the inner wall of the cylinder (1).
5. A powder metallurgy automobile piston with a gradient pore structure according to claim 3, wherein the movable device (3) comprises a pull rod (30), a plug body (31) is rotatably connected to the top end of the pull rod (30), and a pore structure (32) is arranged on the inner wall of the plug body (31).
6. The powder metallurgy automobile piston with the gradient pore structure according to claim 5, wherein the outer wall of the plug body (31) is rotationally connected with the outer wall of the sphere (23), the outer wall of the plug body (31) is slidably connected with the outer wall of the limit strip (24), and the outer wall of the plug body (31) is slidably connected with the inner wall of the cylinder (1).

Description

Powder metallurgy automobile piston with gradient pore structure Technical Field The utility model relates to the technical field of automobile part manufacturing, in particular to a powder metallurgy automobile piston with a gradient pore structure. Background During operation of an automotive engine, the piston acts as a core component for converting gas pressure into mechanical energy, the performance of which directly affects the power output, fuel economy and service life of the engine. The lubricating mode of the existing piston is mostly dependent on an external engine oil system to supply oil through an oil nozzle or an oil duct, when an engine runs at a high speed or the working condition is frequently changed, the supply quantity and the distribution uniformity of lubricating oil are difficult to accurately control, partial lubrication is insufficient or excessive consumption of the lubricating oil is easy to cause, the friction area between the piston ring bank and the cylinder wall is worn due to poor lubrication, the service life of the piston is prolonged, the fuel consumption and the emission of the engine are increased, the sliding friction structure of the traditional piston enables the contact stress between the piston and the cylinder wall to be large, and meanwhile, the piston bears high temperature in the working process. Disclosure of utility model (One) solving the technical problems Aiming at the defects of the prior art, the utility model provides a powder metallurgy automobile piston with a gradient pore structure, which solves the problems of uneven lubrication, large abrasion, poor heat dissipation and complex structure of the traditional piston. (II) technical scheme The powder metallurgy automobile piston comprises a cylinder body, wherein the outer wall of the cylinder body is fixedly connected with a lubricating device, the outer wall of the lubricating device is connected with a movable device in a sliding mode, the lubricating device discharges oil through sliding of the movable device, the lubricating device comprises an oil inlet pipe, the outer wall of the oil inlet pipe is fixedly connected with an oil cavity, the output end of the oil cavity is fixedly connected with an S-shaped groove, the oil cavity and the S-shaped groove of the lubricating device are directly arranged on the inner wall of the cylinder body, the retention time of lubricating oil in the piston is prolonged through a winding path of the S-shaped groove, and the heat dissipation effect is enhanced. Preferably, the outer wall of the oil inlet pipe is fixedly connected with the inner wall of the cylinder, and the oil cavity and the S-shaped groove are formed in the inner wall of the cylinder. Preferably, the inner wall of S-shaped groove rotates and is connected with the spheroid, the inner wall of S-shaped groove and spheroidal outer wall are arranged along the central axis circumference array of barrel, through seting up the S-shaped groove and cooperating spheroidal circumference array arrangement at the barrel inner wall, combine the oil storage characteristic of powder metallurgy gradient pore structure, realized the dynamic self-lubricating in the piston motion process. Preferably, the outer wall symmetry contact of spheroid has spacing, the lateral wall of spacing and the outer wall fixed connection of barrel, the spheroid outer wall rotates with the inner wall of barrel to be connected, and when the mobile device slides, the restriction of spheroid limit position strip rotates, forces the directional flow of lubricating oil in the S-shaped groove to the piston outer wall, effectively reduces frictional resistance. Preferably, the movable device comprises a pull rod, the top end of the pull rod is rotationally connected with a plug body, the inner wall of the plug body is of a gap structure, and the pull rod of the movable device drives the plug body to slide. Preferably, the outer wall of the plug body is rotationally connected with the outer wall of the sphere, the outer wall of the plug body is in sliding connection with the outer wall of the limit strip, and the outer wall of the plug body is in sliding connection with the inner wall of the cylinder. Advantageous effects The utility model provides a powder metallurgy automobile piston with a gradient pore structure. The device comprises the following The beneficial effects are that: According to the utility model, by arranging the lubricating device, the S-shaped grooves are formed in the inner wall of the cylinder body and matched with the circumferential array arrangement of the spheres, and the dynamic self-lubrication in the movement process of the piston is realized by combining the oil storage characteristic of the powder metallurgy gradient pore structure, when the movable device slides, the spheres are restricted by the position limiting strips to rotate, so that the lubricating oil in the S-shaped grooves is forced to flow to the oute