CN202832824U

CN202832824U - Engine piston oil return hole

Info

Publication number: CN202832824U
Application number: CN201220416343.2U
Authority: CN
Inventors: 王文建; 何元章; 刘成; 夏国祥
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2012-08-21
Filing date: 2012-08-21
Publication date: 2013-03-27
Anticipated expiration: 2022-08-21

Abstract

The utility model discloses an engine piston, belongs to the field of automobile engine manufacturing, and solves the problems that the piston is usually prone to be blocked because engine oil contains impurities, and a piston oil return hole needs machining additionally. The engine piston comprises an oil-ring annular groove (4) of the engine piston, an oil return hole (2) is formed in a bottom circle (3) of the oil-ring annular groove (4), the axial oil return hole (2) is formed in a lower ring land (1) of the oil-ring annular groove (4), and the oil return hole (2) is communicated with the oil-ring annular groove (4). Compared with a general piston oil return hole, the piston oil return hole is beneficial for oil return, the piston oil return hole cannot be blocked caused by the fact that the engine oil contains the impurities, the piston oil return hole can be formed through a general mould in a cast mode, subsequent machining for the piston oil hole is not required, the arrangement position of the piston oil return hole is changed from a bearing side to a non-bearing side, and therefore, the engine piston is enabled to be strong in intensity and low in manufacturing cost.

Description

A kind of engine piston spill port

Technical field

The utility model belongs to motor car engine and makes the field, is specifically related to a kind of engine piston spill port.

Background technique

The spill port of conventional engine piston is arranged in the bottom surface (3) of annular incision in the oil piston ring annular groove, this structure can guarantee that the machine oil that scrapes when oil ring is descending can fall back to oil sump smoothly, but the engine piston of this kind structure often can make the piston spill port form obstruction because containing impurity in the machine oil, and this is to the performance and used life important of engine piston; Simultaneously when processing engine piston spill port, if adopting the core of similar interior oil cooling passage casts, comparatively complicated and meeting of technique is so that the increase of casting cost, but the general driling machine add-on type that adopts during the machining piston spill port, too can so that machine to add cost higher, need to improve so send out a merit machine piston spill port.

Summary of the invention

The purpose of this utility model is to provide a kind of engine piston spill port, addresses the above problem.

The technical solution of the utility model is achieved in that and comprises the oil ring groove that arranges on the engine piston wall, and the lower ring bank of described oil ring groove is provided with axial spill port, and spill port is connected with oil ring groove.

The degree of depth of described engine piston spill port is less than the degree of depth of oil ring groove.

Described spill port is arranged on the non-pressure-bearing side of oil ring.

After adopting such structure, since the piston spill port be compare with conventional piston spill port be spill port is arranged on oil ring groove lower ring on the bank, therefore it more is conducive to oil return, and the piston spill port is formed to be stopped up, this piston spill port can adopt general die casting and molding and need not again spill port to be carried out follow-up machining simultaneously, position is changed to non-pressure-bearing side from the pressure-bearing side, and piston intensity is stronger, manufacture cost is lower thereby make.

Description of drawings

Fig. 1 is the utility model engine piston overall structure front view.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B sectional view of Fig. 2.

Fig. 4 is the partial enlarged drawing of Fig. 3.

Fig. 5 is the utility model engine piston overall structure figure.

Accompanying drawing acceptance of the bid score state as follows: 1---lower ring bank, 2---spill port, 3---the oil ring groove bottom surface, 4---oil ring groove.

Embodiment

Below in conjunction with Figure of description the utility model is described further: comprise the oil ring groove (4) that arranges on the engine piston wall, the lower ring bank (1) of described oil ring groove (4) is provided with axial spill port (2), and spill port (2) is connected with oil ring groove (4).

The degree of depth of described engine piston spill port (2) is less than the degree of depth of oil ring groove (4).

Described spill port (2) is arranged on the non-pressure-bearing side of oil ring (1).

The beneficial effects of the utility model are: after adopting such structure, since the piston spill port be compare with conventional piston spill port be spill port is arranged on oil ring groove lower ring on the bank, therefore it more is conducive to oil return, and the piston spill port is formed to be stopped up, this piston spill port can adopt general die casting and molding and need not again spill port to be carried out follow-up machining simultaneously, position is changed to non-pressure-bearing side from the pressure-bearing side, and piston intensity is stronger, manufacture cost is lower thereby make.

Actually add man-hour, only need spill port (2) casting is got final product, do not need to carry out follow-up machining, so this processing method cost is low and very convenient.

Claims

1. engine piston spill port, comprise the oil ring groove (4) that arranges on the engine piston wall, it is characterized in that: the lower ring (1) of described oil ring groove (4) is provided with axial spill port (2), spill port (2) is connected with oil ring groove (4), and described spill port (2) is arranged on the non-pressure-bearing side of oil ring (1).

2. a kind of engine piston spill port as claimed in claim 1, it is characterized in that: the degree of depth of described engine piston spill port (2) is less than the degree of depth of oil ring groove (4).