CN202250453U - Piston of construction machinery engine - Google Patents
Piston of construction machinery engine Download PDFInfo
- Publication number
- CN202250453U CN202250453U CN2011203182022U CN201120318202U CN202250453U CN 202250453 U CN202250453 U CN 202250453U CN 2011203182022 U CN2011203182022 U CN 2011203182022U CN 201120318202 U CN201120318202 U CN 201120318202U CN 202250453 U CN202250453 U CN 202250453U
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- CN
- China
- Prior art keywords
- piston body
- piston
- ring groove
- pin
- machinery engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The utility model relates to components of automobile engines, particularly to a piston of a construction machinery engine, which mainly solves the technical problems that during the operation of the piston of the prior art, fuel oil is not fully mixed with the air, the combustion is not complete, so that the borne thermal load is bigger, stress at the opening of a combustion chamber is dispersing, the using effect is poorer and the like. The piston provided by the utility model includes a piston body (1), and is characterized in that the entire piston body (1) is cylindrical; the combustion chamber (2) is arranged at the top inside the piston body and includes an arc bottom ring groove (3); a raised conical surface (4) is arranged in the middle of the arc bottom ring groove; the taper angle of the conical surface is 140 to 160 DEG; a ring groove (5) is arranged on the outer surface at the top of the piston body; and a pin hole (6) is arranged at the lower part of the piston body.
Description
Technical field
The utility model relates to a kind of component of motor car engine, especially relates to a kind of engineering machinery engine piston.
Background technique
Along with motor, especially along with DENG develops to high compression ratio, high-output power, low emission, long lifetime direction; The use of technology such as charge inter cooling, Electrocontrolled high-pressure injection more and more widely; Piston as the motor heart component; Heat load and mechanical load that it bore are increasing, piston failure phenomenons such as piston head cracking, piston snap ring, piston pin boss cracking occur through regular meeting, cause motor to run well.Chinese patent discloses a kind of piston (notice of authorization number: CN20l827353U) of motor car engine; Be provided with the cavity that can seal in its body; Liquid medium is housed in the cavity, and the body outside also is provided with the filler port that communicates with the body interior cavity, and the filler port place is provided with the plug that is tightly connected with body; The volume of liquid medium is slightly less than the volume of cavity, and liquid medium is antifreeze liquid or water.Chinese patent also discloses a kind of motor car engine piston (notice of authorization number: CN 201100184Y); It comprises piston body; It is oval barrel-shaped that piston body is, and fiery bank adopts unitary tapered design, and by first compression ring, second compression ring, oil ring three ring bank designs; On the key seat of piston body stiffening rib is arranged, the firepower bank adopts low firepower design.But these two kinds of pistons fuel oil and air at work can not fully mix, and it is more insufficient to burn, and the heat load of therefore bearing is bigger, and firing chamber oral area stress comparatively disperses, and using effect is relatively poor.
The model utility content
The utility model provides a kind of engineering machinery engine piston; It mainly is to solve the existing in prior technology piston fuel oil and air can not fully mix at work; It is more insufficient to burn; The heat load of therefore bearing is bigger, and firing chamber oral area stress comparatively disperses, the technical problem of the relatively poor grade of using effect.
The above-mentioned technical problem of the utility model mainly is able to solve through following technical proposals:
A kind of engineering machinery engine piston of the utility model comprises piston body, and described piston body integral body is cylindrical; The inside of piston body napex is provided with the firing chamber; The firing chamber includes circular arc base ring groove, is provided with protruding conical surface in the middle of the circular arc base ring groove, and the taper angle of conical surface is 140-160o; The outer surface at piston body top is provided with annular groove, and the bottom of piston body is provided with pin-and-hole.Piston body can be formed from aluminium, and the black phosphating processing can be carried out in its surface, can increase the corrosion resistance of piston body like this.The annular groove on piston body top can be installed compression ring, oil ring.Be provided with protruding conical surface in the middle of the firing chamber, fuel oil and air are fully mixed, sufficient combustion reduces heat load, reduces firing chamber oral area stress and concentrates.
As preferably, the outer surface at described piston body top is provided with the edge ring, and the edge ring is processed one with piston body.The one ring bank castingin at piston body top has the edge ring, can effectively improve the tensile strength of a ring bank, reduces the thermal distortion of piston body head.
As preferably, the outer surface of described piston body bottom is the skirt section, is provided with one deck printing graphite layer outside the skirt section.The skirt section spraying printing graphite layer of piston body helps the break-in of lubricating engine initial stage, makes normal working of engine, in order to avoid engine scuffing.
As preferably, the outer end of described pin-and-hole is provided with chamfering, and the interior angle of pin-and-hole is a fillet.When assembling, push bearing pin like this, bearing pin can or not cause pin-and-hole to pull phenomenon very along get into pin-and-hole slidingly.
Therefore, the firing chamber of the utility model is made up of circular arc base ring groove and protruding conical surface, and fuel oil and air can fully be mixed, and sufficient combustion reduces heat load, reduces the concentrated stress of firing chamber oral area, and using effect is better, and is simple and reasonable for structure.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the utility model;
Accompanying drawing 2 is side structure schematic representation of Fig. 1.
Component, position and numbering among the figure: piston body 1, firing chamber 2, circular arc base ring groove 3, conical surface 4, annular groove 5, pin-and-hole 6, edge ring 7, skirt section 8, chamfering 9, fillet 10.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technological scheme of the utility model.
Embodiment: a kind of engineering machinery engine piston of this example like Fig. 1, Fig. 2, has a piston body 1; Piston body integral body is cylindrical; The inside of piston body napex is provided with firing chamber 2, and the firing chamber includes circular arc base ring groove 3 and edge ring 7, and wherein the edge ring is processed one with piston body.Be provided with protruding conical surface 4 in the middle of the circular arc base ring groove, the taper angle of conical surface is 150o, and the outer surface at piston body top is provided with annular groove 5, and the bottom of piston body is provided with pin-and-hole 6.The outer end of pin-and-hole is provided with chamfering 9, and the interior angle of pin-and-hole is a fillet 10.The outer surface of piston body bottom is skirt section 8, is provided with one deck printing graphite layer outside the skirt section.
During use, utilize pin-and-hole 6 on the piston body 1 that whole piston is packed into and get final product in the charged injection internal combustion engine.
The above is merely the specific embodiment of the utility model; But the structure characteristic of the utility model is not limited thereto; Any those skilled in the art is in the field of the utility model, and variation of being done or modification all are encompassed among the claim of the utility model.
Claims (4)
1. an engineering machinery engine piston comprises piston body (1), it is characterized in that described piston body (1) is whole for cylindrical; The inside of piston body napex is provided with firing chamber (2); The firing chamber includes circular arc base ring groove (3), is provided with protruding conical surface (4) in the middle of the circular arc base ring groove, and the taper angle of conical surface is 140-160o; The outer surface at piston body top is provided with annular groove (5), and the bottom of piston body is provided with pin-and-hole (6).
2. a kind of engineering machinery engine piston according to claim 1 is characterized in that the outer surface at described piston body (1) top is provided with edge ring (7), and the edge ring is processed one with piston body.
3. a kind of engineering machinery engine piston according to claim 1 and 2 is characterized in that the outer surface of described piston body (1) bottom is skirt section (8), is provided with one deck printing graphite layer outside the skirt section.
4. a kind of engineering machinery engine piston according to claim 1 and 2 is characterized in that the outer end of described pin-and-hole (6) is provided with chamfering (9), and the interior angle of pin-and-hole is fillet (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203182022U CN202250453U (en) | 2011-08-29 | 2011-08-29 | Piston of construction machinery engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203182022U CN202250453U (en) | 2011-08-29 | 2011-08-29 | Piston of construction machinery engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202250453U true CN202250453U (en) | 2012-05-30 |
Family
ID=46111708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203182022U Expired - Fee Related CN202250453U (en) | 2011-08-29 | 2011-08-29 | Piston of construction machinery engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202250453U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121851A (en) * | 2016-07-14 | 2016-11-16 | 邹敏 | A kind of piston of L-type annular groove |
-
2011
- 2011-08-29 CN CN2011203182022U patent/CN202250453U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106121851A (en) * | 2016-07-14 | 2016-11-16 | 邹敏 | A kind of piston of L-type annular groove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20170829 |