CN111156242A - Connecting rod small end structure of engine - Google Patents
Connecting rod small end structure of engine Download PDFInfo
- Publication number
- CN111156242A CN111156242A CN202010141831.6A CN202010141831A CN111156242A CN 111156242 A CN111156242 A CN 111156242A CN 202010141831 A CN202010141831 A CN 202010141831A CN 111156242 A CN111156242 A CN 111156242A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- small end
- rod small
- engine
- inner hole
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 3
- 229910001149 41xx steel Inorganic materials 0.000 claims description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052717 sulfur Inorganic materials 0.000 abstract description 15
- 239000011593 sulfur Substances 0.000 abstract description 15
- 239000007789 gas Substances 0.000 abstract description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052802 copper Inorganic materials 0.000 abstract description 8
- 239000010949 copper Substances 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 230000002378 acidificating effect Effects 0.000 abstract description 5
- 230000001050 lubricating effect Effects 0.000 abstract description 5
- 239000002912 waste gas Substances 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 7
- 241000357293 Leptobrama muelleri Species 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/08—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads made from sheet metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N1/00—Constructional modifications of parts of machines or apparatus for the purpose of lubrication
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a connecting rod small end structure of an engine. The connecting rod small end of the connecting rod small end structure of the engine is provided with a connecting rod small end inner hole, the connecting rod small end inner hole is directly connected with a piston pin, so that acting force applied to the piston is transmitted to a crankshaft, and the inner surface of the connecting rod small end inner hole is subjected to phosphating treatment. The connecting rod small end structure of the engine cancels a lining of the connecting rod small end, thereby avoiding the tile burning of the engine caused by the corrosion of the copper-containing lining by sulfur-containing acidic waste gas, and being safely used in sulfur-containing gas sources such as methane, landfill gas and the like. In addition, the inner hole of the connecting rod small end structure is provided with an oil groove, and the surface of the inner hole of the connecting rod small end is subjected to phosphating treatment, so that the lubricating effect of the joint surface of the piston pin and the connecting rod small end can be improved.
Description
Technical Field
The invention relates to the field of engines, in particular to a connecting rod small end structure of an engine.
Background
The engine connecting rod is a connecting piece for connecting the piston and the crankshaft, and transmits acting force borne by the piston to the crankshaft, so that reciprocating motion of the piston is converted into rotary motion of the crankshaft. The engine connecting rod is composed of three parts, wherein the part connected with the piston pin is called a connecting rod small end, the part connected with the crankshaft is called a connecting rod large end, and the rod part connecting the connecting rod small end and the connecting rod large end is called a connecting rod body. The small end of the connecting rod is mostly of a thin-wall annular structure, and a bush is pressed into the small end hole of the connecting rod for reducing abrasion between the small end of the connecting rod and a piston pin.
At present, a connecting rod small end bushing of an engine connecting rod is generally made of a steel back, and a layer of copper is plated on the surface of the steel back to improve lubrication. However, copper is easily corroded by sulfur, so the connecting rod small end bushing containing copper cannot be generally used in sulfur-containing gas sources, such as biogas, landfill gas and the like, otherwise the bushing is easily corroded by hydrogen sulfide, and finally the engine is burned.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a connecting rod small end structure of an engine, which has a simple and reasonable structure, and the connecting rod small end structure of the engine cancels a lining of a connecting rod small end, thereby avoiding the tile burning of the engine caused by the corrosion of a copper-containing lining by sulfur-containing acidic waste gas, and ensuring that the connecting rod small end structure can be safely used in sulfur-containing gas sources such as methane, landfill gas and the like.
In order to achieve the purpose, the invention provides a connecting rod small end structure of an engine, wherein a connecting rod small end is provided with a connecting rod small end inner hole, the connecting rod small end structure is directly connected with a piston pin through the connecting rod small end inner hole so as to transmit acting force applied to a piston to a crankshaft, and the inner surface of the connecting rod small end inner hole is subjected to phosphating treatment.
In a preferred embodiment, the material of the connecting rod small end is 42 CrMo.
In a preferred embodiment, the small end of the connecting rod is of a thin-wall annular structure.
In a preferred embodiment, the connecting rod small end inner hole is processed with an oil storage tank.
In a preferred embodiment, the oil storage tank comprises a circumferential groove and an axial groove, the circumferential groove is formed along the circumferential direction of the inner hole of the connecting rod small head, the axial groove is formed along the axial direction of the inner hole of the connecting rod small head, and the circumferential groove and the axial groove are communicated with each other in a crossed mode.
Compared with the prior art, the connecting rod small end structure of the engine has the following beneficial effects: the connecting rod small end structure of the engine cancels a lining of the connecting rod small end, thereby avoiding the tile burning of the engine caused by the corrosion of the copper-containing lining by sulfur-containing acidic waste gas, and being safely used in sulfur-containing gas sources such as methane, landfill gas and the like. In addition, the inner hole of the connecting rod small end structure is provided with an oil groove, and the surface of the inner hole of the connecting rod small end is subjected to phosphating treatment, so that the lubricating effect of the joint surface of the piston pin and the connecting rod small end can be improved.
Drawings
Fig. 1 is a schematic view of an engine connecting rod structure of a connecting rod small end structure of an engine according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of an engine connecting rod of a connecting rod small end structure of an engine according to an embodiment of the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1, the connecting rod small end structure of the engine according to the preferred embodiment of the present invention is directly connected to the piston pin through the inner bore of the connecting rod small end, so as to transmit the force applied to the piston to the crankshaft, and convert the reciprocating motion of the piston into the rotating motion of the crankshaft. The bushing of the small end of the connecting rod is cancelled, so that the problem that the engine is burned due to the fact that the copper-containing bushing is corroded by sulfur-containing acidic waste gas is avoided, and the small end structure of the connecting rod can be safely used in sulfur-containing gas sources such as methane and landfill gas. In addition, the inner hole of the connecting rod small end structure is provided with an oil groove, and the surface of the inner hole of the connecting rod small end is subjected to phosphating treatment, so that the lubricating effect of the joint surface of the piston pin and the connecting rod small end can be improved.
Specifically, the engine connecting rod 1 is a connecting member that connects a piston and a crankshaft, and transmits a force applied to the piston to the crankshaft, thereby converting a reciprocating motion of the piston into a rotational motion of the crankshaft. The material of the engine connecting rod 1 is 42CrMo, can resist sulfur corrosion, and has higher hardness than a common steel back bush. The engine connecting rod is composed of three parts, wherein the part connected with a piston pin is called a connecting rod small end 11, the part connected with a crankshaft is called a connecting rod big end 13, and the rod part connecting the connecting rod small end 11 and the connecting rod big end 13 is called a connecting rod body 12.
As shown in fig. 2, the connecting rod small end 11 is a thin-wall circular ring structure, and has a connecting rod small end inner hole 112, and the inner surface of the connecting rod small end inner hole is subjected to phosphating treatment. The connecting rod small end 11 cancels the traditional connecting rod bushing and is directly connected with a piston pin through a connecting rod small end inner hole 112, so that the acting force borne by the piston is transmitted to a crankshaft, and the reciprocating motion of the piston is converted into the rotating motion of the crankshaft. After the inner surface of the connecting rod small end inner hole 112 is subjected to phosphating treatment, the lubricating function is achieved, the abrasion between the inner surface of the connecting rod small end inner hole 112 and a piston pin can be reduced, and the normal operation of the piston pin and the connecting rod small end is ensured. The engine connecting rod 1 is made of 42CrMo, can resist sulfur corrosion, and has higher hardness than a common steel backing bush, so that the engine connecting rod can be safely used in sulfur-containing gas sources such as methane, landfill gas and the like for a long time.
In one embodiment, the connecting rod small end inner hole 112 is processed with an oil storage groove 111, which can lubricate the joint surface of the piston pin and the connecting rod small end, and further ensure the normal operation of the piston pin and the connecting rod small end.
In one embodiment, the oil reservoir 111 includes a circumferential groove and an axial groove, wherein the circumferential groove is formed along the circumferential direction of the connecting rod small end inner hole 112, the axial groove is formed along the axial direction of the connecting rod small end inner hole 112, and the circumferential groove and the axial groove are in cross communication with each other, so that lubricating oil is distributed to the joint surface of the piston pin and the connecting rod small end for lubrication.
In conclusion, the connecting rod small end structure of the engine cancels the bushing of the connecting rod small end, thereby avoiding the tile burning of the engine caused by the corrosion of the copper-containing bushing by sulfur-containing acidic waste gas and ensuring that the connecting rod small end structure can be safely used in sulfur-containing gas sources such as methane, landfill gas and the like. In addition, the inner hole of the connecting rod small end structure is provided with an oil groove, and the surface of the inner hole of the connecting rod small end is subjected to phosphating treatment, so that the lubricating effect of the joint surface of the piston pin and the connecting rod small end can be improved.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (5)
1. The connecting rod small end structure of the engine is characterized in that the connecting rod small end structure is directly connected with a piston pin through the connecting rod small end inner hole so as to transmit acting force applied to a piston to a crankshaft, and the inner surface of the connecting rod small end inner hole is subjected to phosphating treatment.
2. The connecting rod small end structure of an engine according to claim 1, wherein the material of the connecting rod small end is 42 CrMo.
3. The connecting rod small end structure of an engine according to claim 1, wherein the connecting rod small end is a thin-walled circular ring structure.
4. The connecting rod small end structure of the engine according to claim 1, wherein an oil reservoir is formed in the inner bore of the connecting rod small end.
5. The connecting rod small end structure of an engine according to claim 4, wherein the oil reservoir includes a circumferential groove and an axial groove, the circumferential groove is formed along a circumferential direction of the connecting rod small end inner hole, the axial groove is formed along an axial direction of the connecting rod small end inner hole, and the circumferential groove and the axial groove are in cross communication with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141831.6A CN111156242A (en) | 2020-03-04 | 2020-03-04 | Connecting rod small end structure of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010141831.6A CN111156242A (en) | 2020-03-04 | 2020-03-04 | Connecting rod small end structure of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111156242A true CN111156242A (en) | 2020-05-15 |
Family
ID=70567014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010141831.6A Pending CN111156242A (en) | 2020-03-04 | 2020-03-04 | Connecting rod small end structure of engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111156242A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201043563Y (en) * | 2007-05-29 | 2008-04-02 | 无锡明宇机械有限公司 | Connecting rod of engine |
| CN203655877U (en) * | 2013-11-19 | 2014-06-18 | 浙江吉利汽车研究院有限公司 | Engine connecting rod |
| CN204784137U (en) * | 2015-08-10 | 2015-11-18 | 广西玉柴机器股份有限公司 | Engine connecting rod |
| CN207033973U (en) * | 2017-08-01 | 2018-02-23 | 常州机电职业技术学院 | Engine connecting rod |
| CN208457008U (en) * | 2018-03-20 | 2019-02-01 | 玉柴联合动力股份有限公司 | A kind of methane fuelled engine connecting rod |
| CN211820354U (en) * | 2020-03-04 | 2020-10-30 | 广西玉柴机器股份有限公司 | Connecting rod small end structure of engine |
-
2020
- 2020-03-04 CN CN202010141831.6A patent/CN111156242A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201043563Y (en) * | 2007-05-29 | 2008-04-02 | 无锡明宇机械有限公司 | Connecting rod of engine |
| CN203655877U (en) * | 2013-11-19 | 2014-06-18 | 浙江吉利汽车研究院有限公司 | Engine connecting rod |
| CN204784137U (en) * | 2015-08-10 | 2015-11-18 | 广西玉柴机器股份有限公司 | Engine connecting rod |
| CN207033973U (en) * | 2017-08-01 | 2018-02-23 | 常州机电职业技术学院 | Engine connecting rod |
| CN208457008U (en) * | 2018-03-20 | 2019-02-01 | 玉柴联合动力股份有限公司 | A kind of methane fuelled engine connecting rod |
| CN211820354U (en) * | 2020-03-04 | 2020-10-30 | 广西玉柴机器股份有限公司 | Connecting rod small end structure of engine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230104 Address after: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Applicant after: Guangxi Yuchai Ship Electric Power Co.,Ltd. Address before: 537005 No. 88 flyover West Road, the Guangxi Zhuang Autonomous Region, Yulin Applicant before: Guangxi Yuchai Machinery Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200515 |