CN202812031U - Crank connecting rod group used for two-stroke engine - Google Patents
Crank connecting rod group used for two-stroke engine Download PDFInfo
- Publication number
- CN202812031U CN202812031U CN 201220414083 CN201220414083U CN202812031U CN 202812031 U CN202812031 U CN 202812031U CN 201220414083 CN201220414083 CN 201220414083 CN 201220414083 U CN201220414083 U CN 201220414083U CN 202812031 U CN202812031 U CN 202812031U
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- crank
- connecting rod
- stroke engine
- rod group
- group used
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- Expired - Fee Related
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Abstract
The utility model relates to engine crankshafts, in particular to a crank connecting rod group used for a two-stroke engine. The crank connecting rod group used for the two-stroke engine is composed of a left crank, a right crank, a connecting rod, a crank pin and a needle bearing. The lower end of the connecting rod is connected with the left crank and the right crank through the crank pin and the needle bearing. A fit interval of the connecting rod, the crank pin and the needle bearing is 0.012-0.018 millimeter. The crank connecting rod group used for the two-stroke engine has the advantages that a lubricating condition of the crank connecting rod group used for the two-stroke engine is reduced through optimization and structure improvement, crank overall reliability is improved, the engine operation is more stable, noise is reduced, endurance of an engine overall rack is improved, and fuel consumption rate is reduced. After the crank connecting rod group used for the two-stroke engine is matched with a series of improvements such as optimization of a engine shell body air extruding structure and improvement of a cylinder body, emission pollutants and particles of the two-stroke engine completely meet second-stage requirements of the national standard 21633-2000.
Description
Technical field
The utility model relates to engine crankshaft, is a kind of two stroke engine crank-connecting rod group.
Background technique
Connecting rod is that motor is realized work cycle, finishes the main movement part of transformation of energy.The Chinese government more and more payes attention to environmental protection and the higher requirement of energy-saving and cost-reducing proposition in recent years; For mini engine and component manufacturing thereof; associating State General Administration for Quality Supervision of China environmental protection section is in establishment in the end of the year 2010 and issued the first standard GB/T 26133-2010 of China " restriction of mini engine tailpipe emission and method of measurement " (first and second stage of China), and this standard and European Union's standard and USS United States Standard are basically identical.
The model utility content
The purpose of this utility model is to rush by the structure optimization below the bent axle and innovation and two improvement and the optimization of other Component of motor, come it to improve the reliability and stability of motor, so that tail gas discharging pollutant satisfies the second stage requirement of standard GB/T/T21633-2000 fully, provide that a kind of connecting rod and crank fit up gap, the left and right sides are more accurate, two stroke engine crank-connecting rod group various and that reliability is high conforms.
The purpose of this utility model realizes by following approach:
A kind of two stroke engine crank-connecting rod group, formed by left crank, right crank, connecting rod, crank pin, needle bearing, the lower end of connecting rod by crank pin and needle bearing and left crank be connected crank and be connected, the matching gap of described connecting rod, crank pin and needle bearing is 0.012-0.018mm.
Described right crank adopts three layers of stepped construction, is comprised of right crank dress pedestal, the right crank charge of oil envelope diameter of axle and right crank screw thread.
Described right crank charge of oil envelope diameter of axle length is 14-16mm.
Described connecting rod tip top increases oilhole and is convenient to lubricate, dispel the heat.
There is Woodruff key slots and keyways at described left crank frustum place.
The beneficial effects of the utility model are:
By improving precision and the automaticity of processing and Inspection equipment, make connecting rod and left and right sides crank three's fit up gap be controlled at the 0.012-0.018mm scope, optimize the fit up gap of connecting rod and left and right sides crank and the roughness of fitting surface, reduced the requirement of integral shaft to lubricating condition.
Be increased to 14-16mm by right crank charge of oil director Feng degree length, be used for increasing tail gas cleaning passage and other series of measures such as grade, so that oil inflame is more abundant.
Increase oilhole by the connecting rod tip top, be used for lubricating, dispelling the heat, reach the raising reliability and help the raising life-span.
By optimizing and the structure lifting, make its lubricating condition reduce the whole crank shaft Reliability Enhancement, the motor operation is more steady, and noise also has reduction, and the whole stand endurance test of motor is strengthened, increase tail gas cleaning passage and other series of measures such as grade, so that oil inflame is more abundant.Fuel consumption rate reduces, and cooperates a series of improvement such as the structure optimization of motor body squish, cylinder body improvement, and the utility model two stroke engine discharges pollutants and particle satisfies the requirement of China's second stage fully.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail:
Fig. 1 is the utility model structural representation;
1 is left crank, and 2 is right crank, and 3 is connecting rod, and 4 is crank pin, and 5 is needle roller, 6 is needle bearing, and 7 is right crankshaft cushion cap, and 8 is the right crank charge of oil envelope diameter of axle, and 9 is right crank screw thread, 10 is left crank screw thread, and 11 is left crank frustum, and 12 is Woodruff key slots and keyways, and 13 is oilhole.
Embodiment
As shown in Figure 1, a kind of two stroke engine of the utility model crank-connecting rod group, formed by left crank 1, right crank 2, connecting rod 3, crank pin 4, needle bearing 6, the lower end of connecting rod 3 by crank pin 4 are connected with needle bearing with left crank 1 be connected crank 2 and be connected, the matching gap of described connecting rod 3, crank pin 4 and needle bearing 6 is 0.012-0.018mm.
Described right crank 2 adopts three layers of stepped construction, is comprised of right crank dress pedestal 7, the right crank charge of oil envelope diameter of axle 8 and right crank screw thread 9.
The described right crank charge of oil envelope diameter of axle 8 length are 14-16mm.
Described connecting rod 3 large end tops increase oilhole 13 and are convenient to lubricate, dispel the heat.
There is Woodruff key slots and keyways 12 at described left crank frustum 11 places.
Left and right sides crank Screw thread process method is: behind the blank forging, and left and right sides crank screw thread roughing, then the semi finishing core diameter of thread carries out carburizing heat treatment to left and right sides crank; Thread surface is done conservation treatment, does screw thread fine finishing again, to left and right sides crank secondary heat treatment again; Last machining screw more than is used for guaranteeing the sufficient toughness of thread root to the finished product requirement, avoids the screw thread fracture, increases reliability and the working life of product.
By optimizing and the structure lifting, make its lubricating condition reduce the whole crank shaft Reliability Enhancement, the motor operation is more steady, and noise also has reduction, and the whole stand endurance test of motor is strengthened, increase tail gas cleaning passage and other series of measures such as grade, so that oil inflame is more abundant.Fuel consumption rate reduces, and cooperates a series of improvement such as the structure optimization of motor body squish, cylinder body improvement, and the utility model two stroke engine discharges pollutants and particle satisfies the requirement of China's second stage fully.
Claims (5)
1. two stroke engine crank-connecting rod group, formed by left crank, right crank, connecting rod, crank pin, needle bearing, the lower end of connecting rod by crank pin and needle bearing and left crank be connected crank and be connected, it is characterized in that: the matching gap of described connecting rod, crank pin and needle bearing is 0.012-0.018mm.
2. a kind of two stroke engine crank-connecting rod group as claimed in claim 1 is characterized in that: described right crank adopts three layers of stepped construction, is comprised of right crank dress pedestal, the right crank charge of oil envelope diameter of axle and right crank screw thread.
3. a kind of two stroke engine crank-connecting rod group as claimed in claim 2 is characterized in that: described right crank charge of oil envelope diameter of axle length is 14-16mm.
4. a kind of two stroke engine crank-connecting rod group as claimed in claim 2 is characterized in that: described connecting rod tip top increases oilhole and is convenient to lubricate, dispel the heat.
5. a kind of two stroke engine crank-connecting rod group as claimed in claim 1, it is characterized in that: there is Woodruff key slots and keyways at described left crank frustum place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220414083 CN202812031U (en) | 2012-08-21 | 2012-08-21 | Crank connecting rod group used for two-stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220414083 CN202812031U (en) | 2012-08-21 | 2012-08-21 | Crank connecting rod group used for two-stroke engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202812031U true CN202812031U (en) | 2013-03-20 |
Family
ID=47870904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220414083 Expired - Fee Related CN202812031U (en) | 2012-08-21 | 2012-08-21 | Crank connecting rod group used for two-stroke engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202812031U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865344A (en) * | 2012-08-21 | 2013-01-09 | 青岛迈特园林机械零部件有限公司 | Crank connecting rod assembly for two-stroke engine and method for processing threads on crank |
| CN103758608A (en) * | 2014-01-03 | 2014-04-30 | 江苏罡阳股份有限公司 | Crankshaft connecting rod assembly |
| CN103968022A (en) * | 2014-05-22 | 2014-08-06 | 马守斌 | Connecting device for piston transmission |
| CN112502826A (en) * | 2020-06-01 | 2021-03-16 | 重庆宗申航空发动机制造有限公司 | Crankshaft arrangement form and assembly method of two-stroke oil-gas direct injection engine |
-
2012
- 2012-08-21 CN CN 201220414083 patent/CN202812031U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865344A (en) * | 2012-08-21 | 2013-01-09 | 青岛迈特园林机械零部件有限公司 | Crank connecting rod assembly for two-stroke engine and method for processing threads on crank |
| CN103758608A (en) * | 2014-01-03 | 2014-04-30 | 江苏罡阳股份有限公司 | Crankshaft connecting rod assembly |
| CN103758608B (en) * | 2014-01-03 | 2017-01-04 | 江苏罡阳股份有限公司 | Crankshaft rod assembly |
| CN103968022A (en) * | 2014-05-22 | 2014-08-06 | 马守斌 | Connecting device for piston transmission |
| CN112502826A (en) * | 2020-06-01 | 2021-03-16 | 重庆宗申航空发动机制造有限公司 | Crankshaft arrangement form and assembly method of two-stroke oil-gas direct injection engine |
| CN112502826B (en) * | 2020-06-01 | 2021-11-02 | 重庆宗申航空发动机制造有限公司 | Crankshaft arrangement form and assembly method of two-stroke oil-gas direct injection engine |
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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 |
Granted publication date: 20130320 Termination date: 20140821 |
|
| EXPY | Termination of patent right or utility model |