CN204025653U - Piston group - Google Patents
Piston group Download PDFInfo
- Publication number
- CN204025653U CN204025653U CN201420482339.5U CN201420482339U CN204025653U CN 204025653 U CN204025653 U CN 204025653U CN 201420482339 U CN201420482339 U CN 201420482339U CN 204025653 U CN204025653 U CN 204025653U
- Authority
- CN
- China
- Prior art keywords
- piston
- piston ring
- ring
- annular positioning
- piston rod
- 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 discloses a kind of piston group, its drip irrigation device is, comprise piston rod and piston ring, described piston rod offers three road annular positioning grooves from top to bottom successively, be corresponding in turn to three annular positioning grooves and be combined with three annular positioning grooves, the outer end, circular section of described first piston ring is that circular arc is arranged, and the summit of circular arc and cylinder inner wall are conflicted, described second piston ring is taper-face ring, its cylindrical is the up-small and down-big conical surface, described 3rd end, piston ring cross section is provided with at least two lug bosses, and arrange in gap between described adjacent projections, and the larger outer circular edge of described second piston ring diameter has the fillet of R0.1-R1.0 millimeter shape.By technique scheme, can assurance device confined gas and be in the state of oil lubrication for a long time, the cutting edge simultaneously avoiding piston ring sharp edge to produce due to machining grinding and burr produce piston assembly interferes, and ensures the work of piston assembly long-term stability.
Description
Technical field
The utility model relates to a kind of piston group.
Background technique
Piston is one of key fitment in engine fittings, it and the part such as piston ring, wrist pin form piston group, piston group and cylinder, cylinder head form swept volume and combustion chamber volume, bear gaseous-pressure and pass to bent axle by connecting rod, to complete the working procedure of internal-combustion engine.
At present, piston group on the market from top to bottom overwhelming majority is all provided with three road piston rings, but because the structure of piston ring effectively can not be mated with annular positioning groove, Shortcomings on piston ring processing technology, usually cause following problem: 1, piston rod and cylinder block seal poor, 2, piston rod oil membrane in the middle of the process of moving up and down cannot be formed, causing actual between piston rod and cylinder body is run when dry grinding, wearing and tearing are caused to parts, 3, piston ring is in machining process, often can not control chamfering amount very well, all as last procedure using grinding piston ring sharp edge, cause the existence of 90 degree of cutting edges and burr like this, and have ignored this key position when mounted, on the piston rod after lower operation, described cutting edge is as the sharp edge of frizing ring type, lubricant oil is struck off, oil film cannot be formed, after long-term work, burr surface is slowly ground to form tiny crystal grain, cause the rapid breaking-up of cylinder body and piston rod.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of piston group, by changing the structure of piston ring, assurance device confined gas and be in the state of oil lubrication for a long time, the sharp edge burr simultaneously avoiding piston ring to produce due to machining grinding process produces interference to piston assembly, ensures the work of piston assembly long-term stability.
For achieving the above object, the utility model provides following technological scheme: a kind of piston group, comprise piston rod, described piston rod offers the first annular positioning groove from top to bottom successively from its top, second annular positioning groove, 3rd annular positioning groove, be corresponding in turn to three annular positioning grooves and be combined with first piston ring, second piston ring and the 3rd piston ring, end, described first piston ring cross section is that circular arc is arranged, and the summit of circular arc and cylinder inner wall are conflicted, described second piston ring is taper-face ring, its cylindrical is the up-small and down-big conical surface, described 3rd end, piston ring cross section is provided with at least two lug bosses, and arrange in gap between described adjacent projections, the summit of lug boss and cylinder inner wall are conflicted, and the larger outer circular edge of described second piston ring diameter is rounded down.
By adopting technique scheme, described first annular positioning groove is combined with first piston ring, and end, described first piston ring cross section is circular arc setting, and the summit of circular arc and cylinder inner wall are conflicted, be conducive to ring and form stable oil film when moving up and down, it is strong that circular arc arranges sealing, and good lubrication can be ensured and avoid knuckle load, described second annular positioning groove is combined with the second piston ring, and described second piston ring is taper-face ring, its cylindrical is the up-small and down-big conical surface, taper-face ring can improve gas blowby, alter oily situation, little with casing wall area of contact, be conducive to break-in and sealing, described 3rd end, piston ring cross section is provided with at least two lug bosses, and arrange in gap between described adjacent projections, the summit of two lug bosses and cylinder inner wall are conflicted, continuous print projection arranges the tension force that can increase ring itself, increase seal.The outer circular edge that described second piston ring diameter is larger can carefully grind to form the very little fillet of diameter with oilstone, so not only be conducive to operationally forming grease face, and can avoid processing the cutting edge and burr that stay after long-term work, burr surface is slowly ground to form tiny crystal grain, to the rapid breaking-up of cylinder body and piston rod, thus ensure the work of piston assembly long-term stability.
The utility model is set to further: described fillet is R0.1-R1 millimeter, and described fillet and cylinder inner wall are conflicted.
By adopting technique scheme, described fillet and cylinder inner wall are conflicted, and leave gap after avoiding sharp edge rounding with cylinder inner wall.
The utility model is set to further: between described piston rod and each annular positioning groove, equal gap is provided with elasitic layer.
Due to piston rod and piston ring coaxality poor, or can not coordinate very well in the middle of assembly process, actual working state lubrication effect is poor, these reasons all can cause piston rod and cylinder wall to produce larger resistance when moving up and down, described piston ring can not effectively coordinate the pressure that can produce a transverse direction to piston rod due to structure, because piston rod and piston ring are rigid material, thus cause piston rod and piston ring to produce wearing and tearing and damage, therefore gap is provided with elasitic layer between described piston rod and annular positioning groove, like this, the pressure uniform that the buffer function of described elasitic layer can effectively will be subject to disperses, thus protect each parts injury-free.
The utility model is set to further: described elasitic layer is spring.
By adopting technique scheme, spring, being subject to, in external force situation, producing distortion, can play the effect of buffering, thus parts such as protection piston rod and piston ring etc. are not frayed.
Accompanying drawing explanation
Fig. 1 is the sectional shape figure of the utility model piston group embodiment;
Fig. 2 is the partial enlarged drawing of described piston ring and described piston rod joint I;
Fig. 3 is the partial enlarged drawing of described second piston ring and the 3rd piston ring excircle ring II;
Fig. 4 is cutting edge before improving in tratitional technology lower piston ring sharp edge or burr shape.
In figure: 1, piston rod; 2, cylinder; 3, first piston ring; 4, the second piston ring; 5, the 3rd piston ring; 6, fillet; 7, elasitic layer; 8, cutting edge.
Embodiment
Referring to figs. 1 through Fig. 4, the utility model piston group embodiment is described further.
A kind of piston group, comprise piston rod 1, described piston rod 1 offers the first annular positioning groove from top to bottom successively from its top, second annular positioning groove, 3rd annular positioning groove, be corresponding in turn to three annular positioning grooves and be combined with first piston ring 3, second piston ring 4 and the 3rd piston ring 5, end, described first piston ring 3 cross section is that circular arc is arranged, and the summit of circular arc and cylinder 2 inwall are conflicted, described second piston ring 4 is taper-face ring, its cylindrical is the up-small and down-big conical surface, described 3rd end, piston ring 5 cross section is provided with at least two lug bosses, and arrange in gap between described adjacent projections, summit and cylinder 2 inwall of two lug bosses are conflicted, and the larger outer circular edge of described second piston ring 4 diameter is rounded down 6.
By adopting technique scheme, described first annular positioning groove is combined with first piston ring 3, and end, described first piston ring 3 cross section is circular arc setting, and the summit of circular arc and cylinder 2 inwall are conflicted, be conducive to ring and form stable oil film when moving up and down, it is strong that circular arc arranges sealing, and good lubrication can be ensured and avoid knuckle load, described second annular positioning groove is combined with the second piston ring 4, and described second piston ring 4 is taper-face ring, its cylindrical is the up-small and down-big conical surface, taper-face ring can improve gas blowby, alter oily situation, little with casing wall area of contact, be conducive to break-in and sealing, described 3rd end, piston ring 5 cross section is provided with at least two lug bosses, and arrange in gap between described adjacent projections, summit and cylinder 2 inwall of two lug bosses are conflicted, continuous print two projection arranges the tension force that can increase ring itself, increase seal.The outer circular edge that described second piston ring 4 diameter is larger can carefully grind to form the very little fillet of diameter 6 with oilstone, so not only be conducive to operationally forming grease face, and can avoid processing the cutting edge 8 and burr that stay after long-term work, burr surface is slowly ground to form tiny crystal grain, to the rapid breaking-up of cylinder body and piston rod 1, thus ensure the work of piston assembly long-term stability.
Described fillet 6 is R0.1-R1 millimeter, and described fillet 6 and cylinder 2 inwall are conflicted.
By adopting technique scheme, described fillet 6 is conflicted with cylinder 2 inwall, leaves gap after avoiding sharp edge rounding with cylinder 2 inwall.
The utility model is set to further: between described piston rod 1 and each annular positioning groove, equal gap is provided with elasitic layer 7.
Because piston rod 1 and piston ring coaxality are poor, or can not coordinate very well in the middle of assembly process, actual working state lubrication effect is poor, these reasons all can cause piston rod 1 and cylinder 2 wall to produce larger resistance when moving up and down, described piston ring can not effectively coordinate the pressure that can produce a transverse direction to piston rod 1 due to structure, because piston rod 1 and piston ring are rigid material, thus cause piston rod 1 and piston ring to produce wearing and tearing and damage, therefore gap is provided with elasitic layer 7 between described piston rod 1 and annular positioning groove, like this, the pressure uniform that the buffer function of described elasitic layer 7 can effectively will be subject to disperses, thus protect each parts injury-free.
The utility model is set to further: described elasitic layer 7 is spring.
As another kind of mode of execution, described elasitic layer 7 can be also rubber material, but considers that rubber material in atmosphere can be slowly aging, causes it hardening gradually and follows the string, therefore the present embodiment is preferred, and described elasitic layer 7 is spring.Like this, spring is being subject to, in external force situation, producing distortion, thus can play the effect of buffering, and the parts such as protection piston rod 1 and piston ring are not frayed.
Claims (4)
1. a piston group, comprise piston rod, it is characterized in that: described piston rod offers the first annular positioning groove from top to bottom successively from its top, second annular positioning groove, 3rd annular positioning groove, be corresponding in turn to three annular positioning grooves and be combined with first piston ring, second piston ring and the 3rd piston ring, end, described first piston ring cross section is that circular arc is arranged, and the summit of circular arc and cylinder inner wall are conflicted, described second piston ring is taper-face ring, its cylindrical is the up-small and down-big conical surface, described 3rd end, piston ring cross section is provided with at least two lug bosses, and arrange in gap between described adjacent projections, the summit of two lug bosses and cylinder inner wall are conflicted, and the larger outer circular edge of described second piston ring diameter is rounded down.
2. piston group according to claim 1, described fillet is R0.1-R1 millimeter, and described fillet and cylinder inner wall are conflicted.
3. piston group according to claim 1, is characterized in that: between described piston rod and each annular positioning groove, equal gap is provided with elasitic layer.
4. piston group according to claim 3, is characterized in that: described elasitic layer is spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420482339.5U CN204025653U (en) | 2014-08-25 | 2014-08-25 | Piston group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420482339.5U CN204025653U (en) | 2014-08-25 | 2014-08-25 | Piston group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204025653U true CN204025653U (en) | 2014-12-17 |
Family
ID=52065521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420482339.5U Expired - Fee Related CN204025653U (en) | 2014-08-25 | 2014-08-25 | Piston group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204025653U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194657A (en) * | 2016-08-29 | 2016-12-07 | 正昌道森集团有限公司 | A kind of piston used for refrigeration compressor |
-
2014
- 2014-08-25 CN CN201420482339.5U patent/CN204025653U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194657A (en) * | 2016-08-29 | 2016-12-07 | 正昌道森集团有限公司 | A kind of piston used for refrigeration compressor |
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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: 20141217 Termination date: 20160825 |