CN210343520U - Lubricating structure of piston connecting rod mechanism, engine and vehicle - Google Patents
Lubricating structure of piston connecting rod mechanism, engine and vehicle Download PDFInfo
- Publication number
- CN210343520U CN210343520U CN201920911844.XU CN201920911844U CN210343520U CN 210343520 U CN210343520 U CN 210343520U CN 201920911844 U CN201920911844 U CN 201920911844U CN 210343520 U CN210343520 U CN 210343520U
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- connecting rod
- piston
- lubrication
- lubricating
- oil
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- 230000001050 lubricating effect Effects 0.000 title claims abstract description 53
- 230000007246 mechanism Effects 0.000 title claims abstract description 32
- 239000003921 oil Substances 0.000 claims abstract description 94
- 239000010687 lubricating oil Substances 0.000 claims abstract description 47
- 238000005461 lubrication Methods 0.000 claims abstract description 46
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 238000009434 installation Methods 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000000707 wrist Anatomy 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to an engine field discloses a piston link mechanism's lubricating structure, engine and vehicle. The lubricating structure includes: the piston comprises a piston (1) which is provided with a cooling oil passage (11), a connecting rod installation cavity (12) and a lubricating oil passage (13) for connecting the cooling oil passage and the connecting rod installation cavity; a connecting rod (2) having a first end (21) formed with a pin hole (211) and rotatably mounted at the connecting rod mounting cavity by a piston pin (4) passing through the pin hole; wherein the first end (21) is formed with a lubrication hole (212) communicating the pin hole and the connecting rod mounting cavity, the lubrication hole (212) being alignable with an opening of the lubrication oil passage (13) toward the connecting rod mounting cavity (12). The lubricating structure can improve the lubricating effect of the piston connecting rod mechanism and improve the strength of the piston connecting rod mechanism.
Description
Technical Field
The utility model relates to an engine field specifically relates to piston rod mechanism's lubricating structure, engine and vehicle.
Background
The piston connecting rod mechanism is a main motion mechanism of the engine, high-temperature and high-pressure gas generated by combustion of the engine acts on the piston, is transmitted to the connecting rod through the piston pin, and drives the crankshaft to rotate through the connecting rod, so that the high-temperature and high-pressure gas is converted into torque output outwards. In this mechanism, the first end of the connecting rod is connected to the wrist pin, a large force is carried between the first end of the connecting rod and the wrist pin, and because the fit clearance between the two parts is small, directional lubrication is required to ensure that the connecting rod and the wrist pin avoid wear and seizure failure. Conventionally, lubrication of the first end of the connecting rod is typically accomplished by drilling a hole between the first and second ends of the connecting rod and delivering oil through the hole from the second end to the first end of the connecting rod. However, in the practical application process, along with the increase of the length of the connecting rod, the difficulty of drilling between the first end and the second end of the connecting rod is obviously improved, the rejection rate of the connecting rod is increased, the strength of the connecting rod is reduced, and due to the fact that the path for conveying lubricating oil is too long, the amount of the lubricating oil entering between the connecting rod and the piston pin is small, and the lubricating effect is poor. In addition, since the opening of the hole extending from the second end of the connecting rod to the first end of the connecting rod is located at the bottom of the pin hole at the first end of the connecting rod (on the side close to the second end), the bottom of the pin hole is the main bearing surface of the connecting rod and the piston pin, and the hole is formed at the position to be unfavorable for the matching of the connecting rod and the piston pin, and the condition that abnormal abrasion and occlusion failure easily occur in the friction pair between the connecting rod and the piston pin is caused.
Accordingly, it would be desirable to have a lubrication arrangement for a piston rod mechanism that overcomes or at least alleviates the above-mentioned deficiencies of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the problem that prior art exists, providing a piston link mechanism's lubricating structure, this lubricating structure can improve piston link mechanism's lubricated effect, and improves its intensity.
In order to achieve the above object, a first aspect of the present invention provides a lubricating structure of a piston link mechanism, the lubricating structure including: the piston is provided with a cooling oil duct, a connecting rod installation cavity and a lubricating oil duct for connecting the cooling oil duct and the connecting rod installation cavity; a connecting rod having a first end formed with a pin hole, a piston pin passing through the pin hole rotatably mounting the first end at the connecting rod mounting cavity; wherein the first end is formed with a lubrication hole communicating the pin hole and the connecting rod mounting cavity, the lubrication hole being alignable with the opening of the lubrication oil passage toward the connecting rod mounting cavity.
Preferably, the cooling oil passage is formed as an annular oil passage arranged inside the piston in a circumferential direction of the piston.
Preferably, the cooling oil passage comprises an inlet connected with the oil supply device and an outlet connected with the oil return pipeline, wherein the oil pressure of the oil supply device is 55-83 KPa.
Preferably, the lubricating oil passage is a straight oil passage extending in a straight line and formed inside the piston, and a central axis of the lubricating oil passage can coincide with a central axis of the lubricating hole.
Preferably, the first end is provided with two or more lubricating holes at intervals along the rotation direction of the first end.
Preferably, the piston is provided with two or more of the lubricating oil passages corresponding to the lubricating hole.
Preferably, the lubrication hole has a diameter of 3mm to 5 mm; and/or the diameter of the lubricating oil passage is 3mm to 5 mm.
Preferably, the second end of the connecting rod is used for connecting with a crankshaft, wherein the lubricating hole is arranged on the side, away from the second end, of the first end.
A second aspect of the present invention provides an engine comprising a piston rod mechanism's lubricating structure according to the above.
A third aspect of the invention provides a vehicle comprising an engine according to the above.
Through above-mentioned technical scheme, oil through being arranged in the cooling oil duct that is used for cooling the piston provides lubricating oil to the vice friction between the pinhole of the first end department of connecting rod and the piston pin, need not to set up the hole that almost passes whole connecting rod on the connecting rod for the lubrication, the manufacturing of the connecting rod of being convenient for reduces manufacturing cost, and guarantee the intensity of connecting rod self, the life of extension connecting rod, in addition, can also improve the vice lubricating property of friction between pinhole and the piston pin, the vice risk that abnormal wear and interlock appear in this friction has been reduced.
Drawings
Fig. 1 is a schematic view of a lubrication structure of a piston link mechanism according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the lubrication structure of the piston rod mechanism shown in FIG. 1 taken along section line A-A;
fig. 3 is a sectional view of the lubricating structure of the piston link mechanism shown in fig. 1 taken along a sectional line B-B.
Description of the reference numerals
1-piston, 11-cooling oil channel, 111-inlet, 112-outlet, 12-connecting rod installation cavity, 13-lubricating oil channel, 2-connecting rod, 21-first end, 211-pin hole, 212-lubricating hole, 22-second end, 3-oil supply device, 31-nozzle and 4-piston pin.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, unless otherwise specified, the terms of orientation such as "upper, lower, top, bottom" are generally used with respect to the orientation shown in the drawings or the description of the positional relationship of the components with respect to each other in the vertical, or gravitational direction; "inner and outer" generally refer to the inner and outer relative to the contour of the component itself.
According to an aspect of the present invention, there is provided a lubricating structure of a piston link mechanism, referring to fig. 1 and 2, the lubricating structure including: the piston 1 is provided with a cooling oil channel 11, a connecting rod installation cavity 12 and a lubricating oil channel 13 which is connected with the cooling oil channel 11 and the connecting rod installation cavity 12; a connecting rod 2, a pin hole 211 is formed at the first end 21 of the connecting rod 2, and a piston pin 4 penetrating through the pin hole 211 rotatably mounts the first end 21 at the connecting rod mounting cavity 12; wherein the first end 21 is formed with a lubrication hole 212 communicating the pin hole 211 and the connecting rod mounting cavity 12, the lubrication hole 212 being alignable with the opening of the lubrication oil passage 13 toward the connecting rod mounting cavity 12.
The utility model discloses an oil in the cooling oil duct 11 for cooling piston 1 is to the vice lubricating oil that provides of friction between the pinhole 211 of the first end 21 department of connecting rod 2 and the piston pin 4, need not to set up the hole that almost passes whole connecting rod 2 for the lubrication on connecting rod 2, the manufacturing of the connecting rod 2 of being convenient for, reduce manufacturing cost, and guarantee connecting rod 2 self intensity, prolong connecting rod 2's life, in addition, can also improve the vice lubricating property of friction between pinhole 211 and the piston pin 4, the risk that this friction pair appears abnormal wear and interlock has been reduced.
Specifically, referring to fig. 2, the cooling oil in the cooling oil passage 11 enters the connecting rod installation cavity 12 through the lubricating oil passage 13, the lubricating hole 212 at the first end 21 of the connecting rod 2 can rotate around the piston pin 4 along with the swinging of the connecting rod 2, and during the rotation, the lubricating hole 212 can be aligned with the opening of the lubricating oil passage 13, so that the lubricating oil flowing out through the lubricating oil passage 13 enters the lubricating hole 212 and further enters the pin hole 211 through the lubricating hole 212 to provide directional lubrication for the friction pair between the pin hole 211 and the piston pin 4, and the direction indicated by the arrow in fig. 2 is the flow path of the cooling oil.
The structure and the arrangement mode of the cooling oil passage 11 can be properly selected according to actual needs, further, referring to fig. 3, the cooling oil passage 11 is formed as an annular oil passage arranged inside the piston 1 along the circumferential direction of the piston 1, the annular oil passage can provide effective cooling for the whole piston 1 along the circumferential direction of the piston 1, and the cooling oil passage 11 integrated inside the piston 1 makes the piston connecting rod mechanism more compact, simplifies the structure thereof, and avoids the influence on other components caused by the arrangement of the cooling oil passage 11.
The way that the oil in the lubricating oil channel 13 enters the lubricating hole 212 can be properly selected according to actual needs, for example, when the opening of the lubricating oil channel 13 is aligned with the lubricating hole 212 along the gravity direction, the oil drops into the lubricating hole 212 under the action of the gravity of the oil, but the oil entering the lubricating hole 212 is less, and the lubricating effect is poor. Preferably, the oil in the oil passage 13 has a proper oil pressure and flow rate so that the oil is ejected out of the oil passage 13 under pressure and into the oil passage 212 when the oil passage 212 is aligned with the oil passage 13 in the injection direction of the oil. The oil pressure of the oil in the lubricating oil passage 13 can be properly selected according to actual needs, and further, the cooling oil passage 11 includes an inlet connected to the oil supply device 3 and an outlet connected to the oil return line, wherein the oil pressure of the oil supply device 3 is 55-83KPa, so as to ensure that the oil sprayed out of the lubricating oil passage 13 can reach the lubricating hole 212. For example, under the temperature of 25 ℃ plus or minus 5 ℃ and the pressure of the lubricating oil of 55-83KPa, the flow rate of the lubricating oil which is injected through the lubricating oil channel 13 with the diameter of 3 plus or minus 0.5mm and enters the lubricating hole 212 with the diameter of 9 plus or minus 0.1mm at the position of 144mm is 2.46L/min, thereby meeting the lubricating requirement.
First, oil is injected into the oil supply pipeline by the oil nozzle 31 of the oil supply device 3, the oil enters the cooling oil duct 11 after flowing through the oil supply pipeline channel to the inlet 111, flows along the extending direction of the cooling oil duct 11, and when passing through the opening of the lubricating oil duct 13, part of the oil flows into the lubricating oil duct 13, the rest of the oil continues to flow to the outlet 112 and enters the oil return pipeline, the oil entering the lubricating oil duct 13 is ejected from the opening on the other side of the lubricating oil duct 13, if the lubricating oil duct 13 is aligned with the lubricating hole 212, most of the ejected oil enters the lubricating hole 212, and the rest of the ejected oil falls into the engine oil pan (or other oil collecting parts), and if the lubricating oil duct 13 is not aligned with the lubricating hole 212, most or all of the ejected oil falls into the engine oil pan.
Further, the lubricating oil passage 13 is a straight oil passage extending in a straight line formed inside the piston 1, and the central axis of the lubricating oil passage 13 can coincide with the central axis of the lubricating hole 212. The lubricating oil passage 13 is integrated with the piston 1, so that the structure of the piston connecting rod mechanism is more compact, oil pressure loss can be reduced by the oil passage extending along a straight line, the central axis of the lubricating oil passage 13 can be overlapped with the central axis of the lubricating hole 212, and when the opening of the lubricating oil passage 13 is aligned with the lubricating hole 212, sprayed oil can flow along the straight line and quickly reach a friction pair between the pin hole 211 and the piston pin 4.
The first end 21 of the connecting rod 2 is generally disposed at a middle position of the connecting rod mounting cavity 12 to avoid interference with a circumferential wall of the connecting rod mounting cavity 12 during swinging of the connecting rod 2, and the annular cooling oil passage 11 is generally disposed around the outer circumference of the piston 1 as much as possible to improve a flowing range of the cooling oil passage 11 and ensure a cooling effect, so that, referring to fig. 2 and 3, the lubricating oil passage 13 extends obliquely from the cooling oil passage 11 toward the middle of the piston 1, so that an outlet of the lubricating oil passage 13 can be aligned with a friction pair between the connecting rod 2 and the piston 1 to improve the lubricating effect.
The inclination angle of the lubricating oil passage 13 can be appropriately selected according to actual needs, so that the opening of the lubricating oil passage 13 facing the connecting rod mounting cavity 12 can be aligned with the connecting rod 2. Preferably, the extending direction of the oil passage 13 has an angle of 30 to 60 degrees with the central axis of the piston 1.
Further, two or more lubrication holes 212 are arranged at intervals on the first end 21 along the rotation direction of the first end 21, and the lubrication holes 212 can enable more oil to enter a friction pair between the pin hole 211 and the piston pin 4, so that the lubrication effect is further improved. The specific number of the lubrication holes 212 can be selected as required, for example, two, three, four, etc., and in the illustrated embodiment, two lubrication holes 212 are provided.
The number of the lubricating oil passages 13 may be appropriately selected according to actual needs, for example, one or more lubricating oil passages 13, wherein only one lubricating oil passage 13 may be provided for the connecting rod 2 provided with a plurality of lubricating holes 212, and each lubricating hole 212 is provided so as to be capable of being aligned with an opening of the lubricating oil passage 13 in sequence with the swinging of the connecting rod 2. Further, the piston 1 is provided with two or more lubricating oil passages 13 corresponding to the lubricating hole 212, thereby further increasing the amount of oil entering into the lubricating hole 212 and improving the lubricating effect.
Further, the second end 22 of connecting rod 2 is used for being connected with the crankshaft, and the one side that the lubrication hole 212 is close to second end 22 is the main bearing surface of pinhole 211 and piston pin 4, bears great moment, if set up lubrication hole 212 in the one side that is close to second end 22 and lead to the vice condition that unusual wearing and tearing and interlock became invalid of friction to appear easily, consequently, lubrication hole 212 sets up in the one side that second end 22 was kept away from to first end 21, avoids influencing piston rod mechanism's stability and reliability because of seting up lubrication hole 212.
The shapes and the sizes of the lubricating hole 212 and the lubricating oil channel 13 can be properly selected according to actual needs, wherein the diameter of the lubricating hole 212 is preferably 3mm to 5mm, and the diameter of the lubricating oil channel 13 is preferably 3mm to 5mm, so that the lubricating requirements can be met, and the strength of the connecting rod 2 and the piston 1 can be prevented from being influenced by too large open holes.
According to another aspect of the present invention, an engine is provided, comprising a lubrication structure of a piston rod mechanism according to the above.
According to a further aspect of the present invention, a vehicle is provided, the vehicle comprising an engine according to the above.
The advantages of the engine and the vehicle over the prior art are the same as those of the lubricating structure of the piston link mechanism described above, and are not described herein.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. A lubricating structure of a piston link mechanism, characterized in that the lubricating structure comprises:
the piston (1) is provided with a cooling oil channel (11), a connecting rod installation cavity (12) and a lubricating oil channel (13) for connecting the cooling oil channel (11) and the connecting rod installation cavity (12);
a connecting rod (2), wherein a pin hole (211) is formed at a first end (21) of the connecting rod (2), and a piston pin (4) penetrating through the pin hole (211) rotatably mounts the first end (21) at the connecting rod mounting cavity (12);
wherein the first end (21) is formed with a lubrication hole (212) communicating the pin hole (211) and the connecting rod mounting cavity (12), the lubrication hole (212) being alignable with an opening of the lubrication oil passage (13) toward the connecting rod mounting cavity (12).
2. The lubrication structure of a piston connecting rod mechanism according to claim 1, characterized in that the cooling oil passage (11) is formed as an annular oil passage arranged inside the piston (1) in the circumferential direction of the piston (1).
3. The lubrication structure of a piston connecting rod mechanism according to claim 2, wherein the cooling oil passage (11) includes an inlet (111) connected to an oil supply device (3) and an outlet (112) connected to an oil return line, wherein the oil pressure of the oil supply device (3) is 55-83 KPa.
4. The lubrication structure of a piston link mechanism according to claim 2, wherein the lubrication oil passage (13) is a straight oil passage extending in a straight line formed inside the piston (1), and a center axis of the lubrication oil passage (13) can coincide with a center axis of the lubrication hole (212).
5. The lubrication structure of a piston rod mechanism according to claim 1, wherein the first end (21) is provided with two or more lubrication holes (212) at intervals in a rotation direction of the first end (21).
6. The lubrication structure of a piston link mechanism according to claim 5, characterized in that the piston (1) is provided with two or more of the lubrication oil passages (13) corresponding to the lubrication hole (212).
7. The lubrication structure of a piston rod mechanism according to claim 1, wherein the lubrication hole (212) has a diameter of 3mm to 5 mm; and/or the diameter of the lubricating oil channel (13) is 3mm to 5 mm.
8. The lubrication structure of a piston rod mechanism according to any one of claims 1-7, characterized in that the second end (22) of the connecting rod (2) is intended for connection with a crankshaft, wherein the lubrication hole (212) is provided at the side of the first end (21) remote from the second end (22).
9. An engine, characterized in that the engine comprises a lubricating structure of the piston link mechanism according to any one of claims 1 to 8.
10. A vehicle characterized by comprising an engine according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920911844.XU CN210343520U (en) | 2019-06-17 | 2019-06-17 | Lubricating structure of piston connecting rod mechanism, engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920911844.XU CN210343520U (en) | 2019-06-17 | 2019-06-17 | Lubricating structure of piston connecting rod mechanism, engine and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210343520U true CN210343520U (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920911844.XU Expired - Fee Related CN210343520U (en) | 2019-06-17 | 2019-06-17 | Lubricating structure of piston connecting rod mechanism, engine and vehicle |
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| CN (1) | CN210343520U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761806A (en) * | 2021-01-27 | 2021-05-07 | 北京理工大学 | Oil supply structure based on accurate lubrication of integral piston |
-
2019
- 2019-06-17 CN CN201920911844.XU patent/CN210343520U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761806A (en) * | 2021-01-27 | 2021-05-07 | 北京理工大学 | Oil supply structure based on accurate lubrication of integral piston |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200417 |
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