CN108426032A - A kind of engine piston - Google Patents

Abstract

The invention discloses an engine piston, which comprises a piston body. A gas ring and an oil ring are sequentially arranged on the outer upper part of the piston body. Pin holes are arranged in the middle of both sides of the piston body. A bottom ring groove is arranged on the piston body. , the piston body is provided with an oil return passage connecting the bottom ring groove and the pin hole, a piston pin is provided in the pin hole, the piston pin is embedded and connected in the piston body, and a connecting rod is provided on the piston pin A bushing, the outer side of the connecting rod bushing is covered with a connecting rod, the lower part of the connecting rod is provided with an upper connecting cover, and the lower part of the upper connecting cover is provided with a lower connecting cover. In the present invention, the piston body is provided with an oil return passage connecting the ring groove at the bottom and the pin hole, and the excess oil on the cylinder wall can be scraped off through the external oil ring and guided between the pin hole and the piston pin, and the pin hole and the piston pin can be aligned. The pin is lubricated to improve the lubrication performance. At the same time, the piston pin is also equipped with grid grooves and lubrication grooves, which further improves the lubrication performance.

Description

an engine piston

technical field

The invention relates to the technical field of engines, in particular to an engine piston.

Background technique

The piston is the "heart" of the automobile engine. It bears alternating mechanical loads and thermal loads. It is one of the key components in the engine with the worst working conditions. The function of the piston is to bear the gas pressure and transmit it to the connecting rod through the piston pin. When the crankshaft rotates, the top of the piston is still an integral part of the combustion chamber. When the piston moves up and down, the combined oil ring will generally scrape off the excess oil on the cylinder wall and flow it back to the oil pan. However, the existing engine pistons are generally The pinhole and piston pin are lubricated by lubricating oil splashing, but the regularity of the splashing is poor when the oil is oscillating and surging, and it is difficult to ensure the lubrication of the pinhole and piston pin, and the piston pin of the existing engine piston The outer wall at both ends and the pin hole will produce friction when the crankshaft connecting rod is working, and the gap between the two will increase over time, thus affecting the normal operation of the engine. At the same time, the existing technology is not perfect for the operating frequency of the engine, resulting in The frequency of the piston hitting the cylinder is relatively low, which makes the power boosting effect of the car poor. Therefore, the present invention proposes an engine piston to solve the problems in the prior art.

Contents of the invention

In view of the above problems, the present invention proposes an engine piston, the piston body is provided with an oil return passage connecting the bottom ring groove and the pin hole, and the excess oil on the cylinder wall can be scraped off through the external oil ring and guided to the pin hole and the pin hole. Between the piston pins, the pin hole and the piston pin are lubricated to improve the lubrication performance. At the same time, the piston pin is also provided with grid grooves and lubrication grooves, which further improves the lubrication performance.

In order to solve the above problems, the present invention proposes an engine piston, which includes a piston body, an air ring and an oil ring are arranged on the outer upper part of the piston body in turn, pin holes are arranged in the middle of both sides of the piston body, and There is a bottom ring groove, the piston body is provided with an oil return passage connecting the bottom ring groove and the pin hole, a piston pin is arranged in the pin hole, the piston pin is embedded and connected in the piston body, and the piston pin A connecting rod bushing is arranged on the top, and a connecting rod is sleeved on the outer side of the connecting rod bushing. An upper connecting cover is provided on the lower part of the connecting rod, and a lower connecting cover is provided on the lower part of the upper connecting cover.

A further improvement is: the wall of the pin hole is provided with a radially outwardly expanded oil separation groove for oil dispersion corresponding to the lower end of the oil return passage, and the depth of the oil return passage is greater than the depth of the oil ring.

A further improvement is that grid grooves are provided at both ends of the piston pin, and several inclined lubricating grooves are provided between the two groups of grid grooves.

A further improvement is that: both ends of the piston pin are provided with pressure rings, and both ends of the piston pin have cylindrically protruding connecting parts, and ring-shaped grooves are arranged around each connecting part.

A further improvement is that: the annular groove is coaxial with the connecting portion, the pressure ring is provided with a fixing bolt connected to the annular groove, and the fixing bolt is provided with a rubber pad.

The further improvement is: a high-efficiency bearing device is provided between the upper connection cover and the lower connection cover, and the high-efficiency bearing device is composed of a high-speed cage, spherical rollers, an outer ring, and a barrier inner ring. The outer side of the high-speed cage Spherical rollers are provided, an outer ring is arranged on the outer side of the spherical rollers, and a barrier inner ring is arranged on the inner side of the high-speed cage.

The further improvement is that: both sides of the upper connecting cover and the lower connecting cover are provided with bolt holes, the bolt holes are provided with connecting bolts, and the bolt holes on both sides of the lower connecting cover are provided with nuts to cooperate with the connecting bolts , the bolt hole and the lower connecting cover are of an integrated structure.

The beneficial effects of the present invention are: the piston body is provided with an oil return passage connecting the bottom ring groove and the pin hole, and the excess oil on the cylinder wall can be scraped off through the external oil ring and guided between the pin hole and the piston pin, Lubricate the pin hole and the piston pin to improve the lubrication performance. At the same time, the piston pin is also equipped with grid grooves and lubrication grooves to further improve the lubrication performance. In addition, the engine piston is provided with a rubber pad between the pressure ring and the piston pin. The rubber pad can absorb the vibration generated by friction through its own elastic deformation, effectively avoiding the vibration to the fixing bolt, improving the stability of the connection between the pressure ring and the body, and improving the structural stability of the piston pin, thus ensuring the engine's stability. Normal operation, and the barrier inner ring on the high-efficiency bearing device of the engine piston can reduce the friction generated by the rotation of the drive shaft. The high-precision spherical roller rotates with the drive shaft, driving the high-speed retainer to rotate, so that the piston Carrying out high-speed impact to generate vehicle power can increase the power generated by the impact, reduce energy loss in the driving process, and improve the high-efficiency power of vehicle power.

Description of drawings

Fig. 1 is a sectional view of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is an appearance view of the piston pin of the present invention.

Fig. 4 is a schematic structural diagram of the high-efficiency bearing device of the present invention.

Among them: 1-piston body, 2-air ring, 3-oil ring, 4-pin hole, 5-bottom ring groove, 6-oil return passage, 7-piston pin, 8-connecting rod, 9-upper connection cover, 10-Lower connection cover, 11-Oil separation groove, 12-Grid groove, 13-Lubrication groove, 14-Pressure ring, 15-Connection part, 16-Ring groove, 17-Fixing bolt, 18-Rubber pad, 19- Bolt hole, 20-connecting bolt, 21-nut, 22-high-efficiency bearing device, 23-high-speed retainer, 24-spherical roller, 25-outer ring, 26-blocking inner ring.

Detailed ways

In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with the examples, which are only used to explain the present invention, and do not constitute a limitation to the protection scope of the present invention.

As shown in Figures 1, 2, 3, and 4, the present embodiment provides an engine piston, including a piston body 1, a gas ring 2 and an oil ring 3 are arranged on the upper outer side of the piston body 1 in turn, and the piston body 1 There are pin holes 4 in the middle of both sides, the piston body 1 is provided with a bottom ring groove 5, and the piston body 1 is provided with an oil return passage 6 connecting the bottom ring groove 5 and the pin hole 4, and the pin hole 4 is provided with a piston pin 7, the piston pin 7 is embedded in the piston body 1, the piston pin 7 is provided with a connecting rod bushing, the outer side of the connecting rod bushing is covered with a connecting rod 8, and the connecting rod 8 is set on the outside of the connecting rod bushing. The lower part of the rod 8 is provided with an upper connecting cover 9, and the lower part of the upper connecting cover 9 is provided with a lower connecting cover 10, and the lower end of the pin hole 4 corresponds to the oil return passage 6 and is provided with a radially outwardly expanding hole for oil dispersion. The oil distribution groove 11, the depth of the oil return channel 6 is greater than the depth of the oil ring 3, the two ends of the outer side of the piston pin 7 are provided with grid grooves 12, and several inclined grooves are arranged between the two groups of grid grooves 12 Lubricating groove 13, described piston pin 7 both ends are all provided with pressure ring 14, and described piston pin 7 both end surfaces all have the connection part 15 that protrudes in cylindrical shape, and the periphery of each described connection part 15 is provided with There is an annular groove 16, the annular groove 16 is coaxial with the connecting portion 15, the pressure ring 14 is provided with a fixing bolt 17 connected with the annular groove 16, and the fixing bolt 17 is provided with a rubber pad 18, so Bolt holes 19 are provided on both sides of the upper connection cover 9 and the lower connection cover 10, and connection bolts 20 are arranged in the bolt holes 19, and nuts 21 are provided on the bolt holes 19 on both sides of the lower connection cover 10 to connect The bolts 20 are matched, and the bolt holes 19 and the lower connection cover 10 are an integrated structure. A high-efficiency bearing device 22 is arranged between the upper connection cover 9 and the lower connection cover 10, and the high-efficiency bearing device 22 is formed by a high-speed retainer 23. Spherical rollers 24, an outer ring 25, and a barrier inner ring 26. The outer side of the high-speed cage 23 is provided with a spherical roller 24. The outer side of the spherical roller 24 is provided with an outer ring 25. The high-speed cage The inner side of 23 is provided with a barrier inner ring 26 .

The piston body 1 is provided with an oil return passage 6 connecting the bottom ring groove 5 and the pin hole 4, and the excess oil on the cylinder wall can be scraped off through the external oil ring 3 and guided between the pin hole 4 and the piston pin 7, Lubricate the pin hole 4 and the piston pin 7 to improve the lubrication performance. At the same time, the piston pin 7 is also provided with a grid groove 12 and a lubrication groove 13, which further improves the lubrication performance. A rubber pad 18 is arranged between them, and the rubber pad 18 can absorb the vibration generated when friction occurs through its own elastic deformation, effectively avoiding the vibration to the fixing bolt 17, improving the stability of the connection between the pressure ring 14 and the body, and improving the pressure of the piston. The structural stability of the pin 7 ensures the normal operation of the engine, and the barrier inner ring 26 on the high-efficiency bearing device 22 of the engine piston can reduce the friction generated by the rotation of the drive shaft, and the high-precision spherical roller 24 follows the The drive shaft rotates together, driving the high-speed retainer 23 to rotate, allowing the piston to perform high-speed impact to generate vehicle power, which can increase the power generated by the impact, reduce energy loss in the driving process, and improve the high-efficiency work of the vehicle power.

When in use, use the external oil ring 3 to scrape off the excess oil on the cylinder wall and guide it between the pin hole 4 and the piston pin 7, cooperate with the oil return passage 6 and the oil distribution groove 11 to lubricate the pin hole 4 and the piston pin 7 , to improve the lubrication performance, and at the same time, the grid groove 12 on the exposed outer surface of the piston pin 7 can make the splashed lubricating oil better adhere to the surface of the piston pin 7. With the reciprocating movement of the piston, it was previously attached to the grid groove 12 The lubricating oil gradually flows into the lubricating groove 13 and forms an oil film at the joint between the piston pin 7 and the connecting rod 8 to achieve the purpose of lubrication. When the piston moves up and down, the rubber pad 18 can absorb the internal friction through its own elastic deformation. Vibration, effectively prevent the vibration from vibrating to the fixing bolt 17, improve the structural stability of the piston pin 7, and ensure the normal operation of the engine, and then drive the high-efficiency bearing device 22 to rotate by driving the active high-speed rotation when the engine starts. The resistance inner ring 26 can reduce the friction generated by the rotation of the drive shaft. The high-precision spherical roller 24 rotates with the drive shaft, driving the high-speed retainer 23 to rotate, allowing the piston to perform high-speed impact to generate vehicle power. The outer ring 25 can protect the internal equipment from damage.

Claims (7)

1. a kind of engine piston, it is characterised in that：Including piston only（1）, the piston only（1）Outer upper is set successively There is compression ring（2）, oil ring（3）, the piston only（1）Position is equipped with pin hole among both sides（4）, the piston only（1）On set There is bottom annular groove（5）, the piston only（1）It is equipped with connection bottom annular groove（5）With pin hole（4）Back oil road（6）, the pin Hole（4）It is interior to be equipped with piston pin（7）, the piston pin（7）Insertion is connected to piston only（1）It is interior, the piston pin（7）It is equipped with Connecting rob bushing, the connecting rob bushing outside are cased with connecting rod（8）, the connecting rod（8）Lower part is equipped with upper connection cover（9）, the upper company Connect lid（9）Lower part is equipped with lower connection cover（10）.

2. a kind of engine piston according to claim 1, it is characterised in that：The pin hole（4）Hole wall corresponds to back oil road （6）Oil groove is divided in lower end equipped with what is radially extended out for fluid dispersion（11）, the back oil road（6）Depth be more than oil ring（3） Depth.

3. a kind of engine piston according to claim 1, it is characterised in that：The piston pin（7）Outside both ends are equipped with Grid groove（12）, grid groove described in two groups（12）Between be equipped with several inclined lubrication grooves（13）.

4. a kind of engine piston according to claim 1, it is characterised in that：The piston pin（7）Both ends are equipped with pressure Ring（14）, the piston pin（7）Both ends of the surface on all have the interconnecting piece of cylindrical protrusion（15）, each interconnecting piece （15）Be surrounded by annular groove（16）.

5. a kind of engine piston according to claim 4, it is characterised in that：The annular groove（16）With interconnecting piece （15）Coaxially, the pressure ring（14）It is equipped with fixing bolt（17）With annular groove（16）Connection, the fixing bolt（17）On It is provided with rubber pad（18）.

6. a kind of engine piston according to claim 1, it is characterised in that：The upper connection cover（9）With lower connection cover （10）Both sides are equipped with bolt hole（19）, the bolt hole（19）It is interior to be equipped with connection bolt（20）, the lower connection cover（10）Two The bolt hole of side（19）It is equipped with nut（21）With connect bolt（20）It matches, the bolt hole（19）With lower connection cover（10） It is integrated.

7. a kind of engine piston according to claim 1, it is characterised in that：The upper connection cover（9）With lower connection cover （10）Between be equipped with high-efficiency bearing device（22）, the high-efficiency bearing device（22）By high speed retainer（23）, spherical roller （24）, outer ring（25）, deaden inner ring（26）Composition, the high speed retainer（23）Outside is equipped with spherical roller（24）, the ball Face roller（24）Outside is equipped with outer ring（25）, the high speed retainer（23）Inside, which is equipped with, deadens inner ring（26）.