CN104110323A - Piston structure capable of improving anti-seize capacity of pin hole - Google Patents
Piston structure capable of improving anti-seize capacity of pin hole Download PDFInfo
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- CN104110323A CN104110323A CN201410129993.2A CN201410129993A CN104110323A CN 104110323 A CN104110323 A CN 104110323A CN 201410129993 A CN201410129993 A CN 201410129993A CN 104110323 A CN104110323 A CN 104110323A
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Abstract
The invention discloses a piston structure capable of improving anti-seize capacity of a pin hole and relates to a piston. The piston structure comprises a piston body and a piston skirt, the piston body comprises a piston head, the outer wall of the piston head is provided with at least two annular grooves, each annular groove comprises an annular oil ring groove, a pin seat is arranged on the piston skirt and provided with the pin hole inside. The piston body is provided with oblique oil return holes inside, one ends of the oil return holes are communicated with the pin hole, and the other ends of the oil return holes are communicated with the annular oil ring grooves. The annular oil ring grooves are communicated with the pin hole through the oil return hole, so that engine oil scraped by oil rings can directly enter the pin hole to lubricate, lubrication of the pin hole is greatly improved, and anti-seize capacity of the pin hole is improved. Meanwhile, the engine oil is forced to enter the pin hole, fitting clearance of the pin hole and the pin is reduced, and impact noise of the pin and a pin hole is reduced.
Description
Technical field
The present invention relates to engine art, be specifically related to piston.
Background technique
Piston of automobile cans be compared to the central position of motor car engine, has accounted for extremely important status in the time of engine start.Piston of automobile is used for bearing gas pressure on the one hand, and orders about crankshaft rotating by wrist pin by connecting rod; Piston head or the constituent element of firing chamber on the other hand.
Conventionally pin-and-hole is lubricated and adopts optimization pin-and-hole shape line, improve pin-and-hole wearing and tearing and bite-resistant ability in the mode of piston cavity brill spill port.
But along with improving constantly of engine parameter, the working environment of piston pin hole is more and more severe, the amount that adopts the mode of splashing to enter the machine oil of pin-and-hole can not meet the demands; Even if adopt inner chamber to bore spill port, same because be that indirect mode makes machine oil enter pin-and-hole, the amount that enters the machine oil of pin bore lubrication can not meet the demands equally.
Summary of the invention
The object of the present invention is to provide a kind of piston structure that improves pin-and-hole bite-resistant ability, to solve the problems of the technologies described above.
Technical problem solved by the invention can realize by the following technical solutions:
A kind of piston structure that improves pin-and-hole bite-resistant ability, comprise piston main body, described piston main body comprises a piston crown, on the outer wall of described piston crown, have at least two annular grooves, described annular groove comprises an oil ring groove, it is characterized in that, described piston main body also comprises piston skirt, described piston skirt is provided with key seat, and the inside of described key seat is provided with pin-and-hole;
Described piston main body inside offers the spill port of an inclination, one end of described spill port and described pin-and-hole UNICOM, the other end of described spill port and described oil ring groove UNICOM.
The present invention makes oil ring groove and pin-and-hole UNICOM by spill port, provides lubricated thereby make machine oil that oil ring scrapes off directly be entered pin-and-hole; This is strengthened the lubricated of pin-and-hole greatly, has increased the bite-resistant ability of pin-and-hole, because machine oil is forced into pin-and-hole, can reduce the matching gap of pin-and-hole and pin simultaneously, has reduced the impact noise of pin and pin-and-hole.
Described piston main body inside offers an even numbers spill port, and described spill port is symmetrically distributed in the top of described pin-and-hole.
Described piston main body inside offers two spill ports, and the angle between the shaft axis of two described spill ports and the shaft axis of described piston main body is consistent, and described angle is not more than 80 °, and is not less than 45 °.Thereby realize evenly lubricated.
Described piston main body inside offers at least two spill ports, described spill port is symmetrically distributed in the top of described pin-and-hole between two, and the angle between the shaft axis of described spill port and the shaft axis of described piston main body is consistent between two, and described angle is not more than 80 °, and be not less than 45 °.Thereby realize evenly lubricated.
On the outer wall of described piston crown, have the first annular groove, be provided with the first edge circle in described the first annular groove, described the first edge circle is preferably a cast iron ring carrier.Cast iron ring carrier can greatly increase the abrasion resistance properties of annular groove, and the whole service life of piston is obviously increased.
On the outer wall of described piston crown, have the second annular groove, in described the second annular groove, can be provided with the second edge circle, described the second edge circle is a cast iron ring carrier, and the first lower wall of inlaying circle connects the upper side wall of the second edge circle, and formation one is the entirety of " m " type.The overall cast iron ring carrier of " m " type can greatly increase the ability of bearing pressure of explosion of encircling bank between the abrasion resistance properties and, two annular grooves of annular groove, and the whole service life of piston is obviously increased.
Down be followed successively by the first annular groove, the second annular groove, oil ring groove by piston crown top.
In described pin-and-hole, be provided with a pin matching with described pin-and-hole, described piston main body is connected with a connecting rod by described pin, and described connecting rod small end is provided with at least two oil collecting holes.The quantity of spill port and oil collecting hole can be different and different according to lubricated degree, arrange after multiple spill ports and oil collecting hole, and the machine oil that enters pin-and-hole and connecting rod small end hole can be more, more can further reduce the interlock of pin-and-hole because of oil starvation and pin generation.
Described piston main body can be aluminium, steel or castiron piston main body.
Described piston main body is a diesel engine piston main body, and the piston crown top of institute's diesel engine piston main body is provided with the projection of a pit or complicated shape, and described interior oil cooling passage is positioned at piston crown below, near described pit edge.
The inwall of described annular groove is provided with a protective coating, and described protective coating is preferably DLC coating.DLC coating full name is diamond-like coating, and described DLC coating can be hydrogeneous diamond-like coating, non-hydrogen diamond coating.DLC coating thickness is preferably 0.3 micron～15 microns.The metastable amorphous substance that contains diamond mechanism and/or graphite structure in described DLC coating, has less friction factor, can further reduce frictional work loss, has improved the fuel economy of motor.
As a kind of preferred version, in described piston only, be provided with interior oil cooling passage, in described piston only, be also provided with a communication passage, described pin-and-hole is by oil cooling passage in described in described communication passage UNICOM.Machine oil enters interior oil cooling passage through oil input channel, piston only is carried out cooling, and after cooling completing, a part of machine oil is back in motor through oil road.And another part machine oil flows into communication passage through interior oil cooling passage, enter pin-and-hole by communication passage, realize the effect that pin-and-hole is lubricated, reduce the wearing and tearing of kinematic pair, thereby improve the life-span.The lubricating system of above-mentioned design, compared with splash lubrication, enters pin-and-hole oil level obviously how a lot, has improved like this lubricated of pin-and-hole, obviously reduces the interlock of pin-and-hole because of oil starvation and pin generation.
Described pin-and-hole place is provided with oil-bearing structure; The oil-bearing structure of pin-and-hole described in one end UNICOM of described communication passage, described in the other end UNICOM of described communication passage in the bottom of oil cooling passage.So that the machine oil flowing in pin-and-hole from interior oil cooling passage is stored.
Described communication passage is the passage of an inclination.Flow to pin-and-hole place so that the machine oil in interior oil cooling passage is easier through communication passage.
In described piston only, be provided with at least two communication passage.The quantity of communication passage can need to be lubricated according to pin-and-hole degree different and different, arrange after multiple communication passage, the machine oil that enters pin-and-hole can be more, further reduce the wearing and tearing of kinematic pair, thereby improve the life-span.
Equidistantly arrange along the axial direction of described pin-and-hole in described communication passage end that be provided with end described pin-and-hole UNICOM and described spill port and described pin-and-hole UNICOM that be provided with.
As another kind of preferred version, in described piston only, be provided with interior oil cooling passage, in described piston only, be also provided with a communication passage, one end of described communication passage connects described interior oil cooling passage, the other end of described communication passage and described spill port UNICOM.Thereby improve the lubricity of pin-and-hole.
As another kind of preferred version, in described piston only, be provided with interior oil cooling passage, in described piston only, be also provided with first passage, described pin-and-hole is by oil cooling passage in described in described first passage UNICOM;
In described piston only, be also provided with second channel, first passage is by spill port described in described second channel UNICOM.
Thereby improve pin bore lubrication uniformity.
Described first passage and described second channel are all the passages that tilt.Described first passage angle of inclination is vertically less than described second channel angle of inclination vertically.By the control to first passage, second channel angle of inclination, thus the distribution condition of control machine oil.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is a kind of partial structurtes schematic diagram of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, further set forth the present invention below in conjunction with concrete diagram.
Referring to Fig. 1, Fig. 2, a kind of piston structure that improves pin-and-hole bite-resistant ability, comprise piston main body, piston main body comprises a piston crown, on the outer wall of piston crown, have at least two annular grooves, annular groove comprises an oil ring groove 5, and piston main body also comprises piston skirt, piston skirt is provided with key seat, and the inside of key seat is provided with pin-and-hole 1; Piston main body inside offers the spill port 2 of an inclination, one end of spill port 2 and pin-and-hole 1 UNICOM, the other end of spill port 2 and oil ring groove 5 UNICOMs.The present invention makes oil ring groove 5 and pin-and-hole 1 UNICOM by spill port 2, provides lubricated thereby make machine oil that oil ring scrapes off directly be entered pin-and-hole 1; This is strengthened the lubricated of pin-and-hole 1 greatly, has increased the bite-resistant ability of pin-and-hole 1, simultaneously because machine oil is forced into pin-and-hole 1, can reduce the matching gap of pin-and-hole 1 and pin, has reduced the impact noise of pin and pin-and-hole 1.
Piston main body inside offers at least two spill ports 2, equidistantly arranges along the axial direction of pin-and-hole in the end of at least two spill ports and pin-and-hole UNICOM.The end of at least two spill ports and pin-and-hole UNICOM is not more than 1/2 of pin-and-hole length along the spacing of arranging on the axial direction of pin-and-hole.The end of at least two spill ports and oil ring groove UNICOM is evenly arranged on oil ring groove along the central direction equal angles of oil ring groove.
Piston main body inside offers at least two spill ports 2, and spill port 2 is symmetrically distributed in the top of pin-and-hole 1 between two, and angle between the shaft axis of spill port 2 and the shaft axis of piston main body is consistent between two, and angle is not more than 80 °, and is not less than 45 °.Thereby realize evenly lubricated.
Piston main body inside offers an even numbers spill port 2, and spill port 2 is symmetrically distributed in the top of pin-and-hole 1.
It is consistent that piston main body inside offers angle between shaft axis and the shaft axis of piston main body of 2, two spill ports 2 of two spill ports, and angle is not more than 80 °, and is not less than 45 °.Thereby realize evenly lubricated.
On the outer wall of piston crown, have in the first annular groove 3, the first annular grooves 3 and be provided with the first edge circle, the first edge circle is preferably a cast iron ring carrier.Cast iron ring carrier can greatly increase the abrasion resistance properties of annular groove, and the whole service life of piston is obviously increased.
On the outer wall of piston crown, have in the second annular groove 4, the second annular grooves 4 and can be provided with the second edge circle, the second edge circle is a cast iron ring carrier, and the first lower wall of inlaying circle connects the upper side wall of the second edge circle, and formation one is the entirety of " m " type.The overall cast iron ring carrier of " m " type can greatly increase the ability of bearing pressure of explosion of encircling bank between the abrasion resistance properties and, two annular grooves of annular groove, and the whole service life of piston is obviously increased.
Down be followed successively by the first annular groove 3, the second annular groove 4, oil ring groove 5 by piston crown top.
Piston main body can be aluminium, steel or castiron piston main body.
Piston main body is a diesel engine piston main body, and the piston crown top of institute's diesel engine piston main body is provided with the projection of a pit or complicated shape, and interior oil cooling passage is positioned at piston crown below, near pit edge.
The inwall of annular groove is provided with a protective coating, and protective coating is preferably DLC coating.DLC coating full name is diamond-like coating, and DLC coating can be hydrogeneous diamond-like coating, non-hydrogen diamond coating.DLC coating thickness is preferably 0.3 micron～15 microns.The metastable amorphous substance that contains diamond mechanism and/or graphite structure in DLC coating, has less friction factor, can further reduce frictional work loss, has improved the fuel economy of motor.
Pin-and-hole place is provided with an oil storage tank, one end of spill port and oil storage tank UNICOM, the other end of spill port and oil ring groove UNICOM.
Also can be, be provided with a pin matching with pin-and-hole 1 in pin-and-hole 1, piston main body be connected with a connecting rod by pin, and connecting rod small end is provided with at least two oil collecting holes.The quantity of spill port 2 and oil collecting hole can be different and different according to lubricated degree, arrange after multiple spill ports 2 and oil collecting hole, and the machine oil that enters pin-and-hole 1 and connecting rod small end hole can be more, more can further reduce the interlock of pin-and-hole 1 because of oil starvation and pin generation.Oil collecting hole is corresponding with spill port, and the machine oil flowing out in a spill port, because effect of inertia flows into the oil collecting hole of answering in contrast.Also can be that an oil collecting hole correspondence is provided with multiple spill ports, the machine oil flowing out in multiple spill ports, because effect of inertia all flows into same oil collecting hole, be convenient to the storage of oil mass.
As a kind of preferred version, in piston only, be provided with interior oil cooling passage, in piston only, be also provided with a communication passage, pin-and-hole is by oil cooling passage in communication passage UNICOM.Machine oil enters interior oil cooling passage through oil input channel, piston only is carried out cooling, and after cooling completing, a part of machine oil is back in motor through oil road.And another part machine oil flows into communication passage through interior oil cooling passage, enter pin-and-hole by communication passage, realize the effect that pin-and-hole is lubricated, reduce the wearing and tearing of kinematic pair, thereby improve the life-span.The lubricating system of above-mentioned design, compared with splash lubrication, enters pin-and-hole oil level obviously how a lot, has improved like this lubricated of pin-and-hole, obviously reduces the interlock of pin-and-hole because of oil starvation and pin generation.Pin-and-hole place is provided with oil-bearing structure; The oil-bearing structure of one end UNICOM pin-and-hole of communication passage, the bottom of oil cooling passage in the other end UNICOM of communication passage.So that the machine oil flowing in pin-and-hole from interior oil cooling passage is stored.Communication passage is the passage of an inclination.Flow to pin-and-hole place so that the machine oil in interior oil cooling passage is easier through communication passage.In piston only, be provided with at least two communication passage.The quantity of communication passage can need to be lubricated according to pin-and-hole degree different and different, arrange after multiple communication passage, the machine oil that enters pin-and-hole can be more, further reduce the wearing and tearing of kinematic pair, thereby improve the life-span.Communication passage is that be provided with end pin-and-hole UNICOM with spill port is that be provided with equidistantly arranges along the axial direction of pin-and-hole with end pin-and-hole UNICOM.
Communication passage and oil collecting hole or oil storage tank UNICOM.So that oil storage.
As another kind of preferred version, in piston only, be provided with interior oil cooling passage, in piston only, be also provided with a communication passage, oil cooling passage in one end of communication passage connects, the other end of communication passage and spill port UNICOM.Thereby improve the lubricity of pin-and-hole.
As another kind of preferred version, in piston only, be provided with interior oil cooling passage, in piston only, be also provided with first passage, pin-and-hole is by oil cooling passage in first passage UNICOM; In piston only, be also provided with second channel, first passage is by second channel UNICOM spill port.Thereby improve pin bore lubrication uniformity.First passage and second channel are all the passages that tilt.First passage angle of inclination is vertically less than second channel angle of inclination vertically.By the control to first passage, second channel angle of inclination, thus the distribution condition of control machine oil.First passage and oil collecting hole or oil storage tank UNICOM.So that oil storage.
More than show and described basic principle of the present invention and major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. one kind is improved the piston structure of pin-and-hole bite-resistant ability, comprise piston main body, described piston main body comprises a piston crown, on the outer wall of described piston crown, have at least two annular grooves, described annular groove comprises an oil ring groove, it is characterized in that, described piston main body also comprises piston skirt, described piston skirt is provided with key seat, and the inside of described key seat is provided with pin-and-hole;
Described piston main body inside offers the spill port of an inclination, one end of described spill port and described pin-and-hole UNICOM, the other end of described spill port and described oil ring groove UNICOM.
2. a kind of piston structure that improves pin-and-hole bite-resistant ability according to claim 1, is characterized in that: described piston main body inside offers an even numbers spill port, and described spill port is symmetrically distributed in the top of described pin-and-hole.
3. a kind of piston structure that improves pin-and-hole bite-resistant ability according to claim 1 and 2, it is characterized in that: described piston main body inside offers two spill ports, angle between the shaft axis of two described spill ports and the shaft axis of described piston main body is consistent, described angle is not more than 80 °, and is not less than 45 °.
4. a kind of piston structure that improves pin-and-hole bite-resistant ability according to claim 1, is characterized in that: on the outer wall of described piston crown, have the first annular groove, be provided with the first edge circle in described the first annular groove, described the first edge circle is a cast iron ring carrier;
On the outer wall of described piston crown, have the second annular groove, in described the second annular groove, can be provided with the second edge circle, described the second edge circle is a cast iron ring carrier, and the first lower wall of inlaying circle connects the upper side wall of the second edge circle, and formation one is the entirety of " m " type;
Down be followed successively by the first annular groove, the second annular groove, oil ring groove by piston crown top.
5. a kind of piston structure that improves pin-and-hole bite-resistant ability according to claim 1, it is characterized in that: in described pin-and-hole, be provided with a pin matching with described pin-and-hole, described piston main body is connected with a connecting rod by described pin, and described connecting rod small end is provided with at least one oil collecting hole.
6. a kind of piston structure that improves pin-and-hole bite-resistant ability according to claim 1, is characterized in that: described piston main body is aluminium, steel or castiron piston main body.
7. a kind of piston structure that improves pin-and-hole bite-resistant ability according to claim 1, it is characterized in that: in described piston only, be provided with interior oil cooling passage, in described piston only, be also provided with a communication passage, described pin-and-hole is by oil cooling passage in described in described communication passage UNICOM.
8. a kind of piston structure that improves pin-and-hole bite-resistant ability according to claim 1, it is characterized in that: in described piston only, be provided with interior oil cooling passage, in described piston only, be also provided with a communication passage, one end of described communication passage connects described interior oil cooling passage, the other end of described communication passage and described spill port UNICOM.
9. according to a kind of piston structure that improves pin-and-hole bite-resistant ability described in claim 7 or 8, it is characterized in that: described piston main body is a diesel engine piston main body, the piston crown top of institute's diesel engine piston main body is provided with the projection of a pit or complicated shape, described interior oil cooling passage is positioned at piston crown below, near described pit edge.
10. a kind of piston structure that improves pin-and-hole bite-resistant ability according to claim 1, is characterized in that: the inwall of described annular groove is provided with a protective coating, and described protective coating is DLC coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129993.2A CN104110323A (en) | 2014-04-01 | 2014-04-01 | Piston structure capable of improving anti-seize capacity of pin hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410129993.2A CN104110323A (en) | 2014-04-01 | 2014-04-01 | Piston structure capable of improving anti-seize capacity of pin hole |
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| CN104110323A true CN104110323A (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410129993.2A Pending CN104110323A (en) | 2014-04-01 | 2014-04-01 | Piston structure capable of improving anti-seize capacity of pin hole |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533654A (en) * | 2014-11-28 | 2015-04-22 | 重庆小康工业集团股份有限公司 | Engine piston |
| CN109026426A (en) * | 2018-08-15 | 2018-12-18 | 全椒县全动机械有限公司 | A kind of internal combustion engine and its surface treatment method |
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| JPH08232624A (en) * | 1995-02-28 | 1996-09-10 | Toyota Autom Loom Works Ltd | Lubricating structure between piston and connecting rod in internal combustion engine |
| JPH09119523A (en) * | 1995-10-24 | 1997-05-06 | Kubota Corp | Piston in internal combustion engine |
| CN102278227A (en) * | 2011-07-18 | 2011-12-14 | 浙江易邦机械有限公司 | Piston with abrasion-resistant inlaid ring |
| CN202545040U (en) * | 2011-12-06 | 2012-11-21 | 马勒技术投资(中国）有限公司 | Light-weight gasoline engine piston adopting pin hole and lubricant hole |
| CN202596911U (en) * | 2011-12-06 | 2012-12-12 | 马勒技术投资(中国）有限公司 | Piston using inner cooling oil duct to lubricate pin hole |
| CN203420794U (en) * | 2013-08-02 | 2014-02-05 | 马勒技术投资(中国）有限公司 | Piston structure for lubricating connecting rod and pin |
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2014
- 2014-04-01 CN CN201410129993.2A patent/CN104110323A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08232624A (en) * | 1995-02-28 | 1996-09-10 | Toyota Autom Loom Works Ltd | Lubricating structure between piston and connecting rod in internal combustion engine |
| JPH09119523A (en) * | 1995-10-24 | 1997-05-06 | Kubota Corp | Piston in internal combustion engine |
| CN102278227A (en) * | 2011-07-18 | 2011-12-14 | 浙江易邦机械有限公司 | Piston with abrasion-resistant inlaid ring |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533654A (en) * | 2014-11-28 | 2015-04-22 | 重庆小康工业集团股份有限公司 | Engine piston |
| CN109026426A (en) * | 2018-08-15 | 2018-12-18 | 全椒县全动机械有限公司 | A kind of internal combustion engine and its surface treatment method |
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Application publication date: 20141022 |
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