CN202646337U - Crankshaft assembly of single cylinder motorcycle engine - Google Patents
Crankshaft assembly of single cylinder motorcycle engine Download PDFInfo
- Publication number
- CN202646337U CN202646337U CN 201220238197 CN201220238197U CN202646337U CN 202646337 U CN202646337 U CN 202646337U CN 201220238197 CN201220238197 CN 201220238197 CN 201220238197 U CN201220238197 U CN 201220238197U CN 202646337 U CN202646337 U CN 202646337U
- Authority
- CN
- China
- Prior art keywords
- crank
- single cylinder
- crankshaft assembly
- motorcycle engine
- cylinder motorcycle
- 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 - Lifetime
Links
Images
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
The utility model provides a crankshaft assembly of a single cylinder motorcycle engine to solve the problems that the position of crank thin wall of an existing crankshaft assembly of the single cylinder motorcycle has poor strength and is deformed easily after being stressed, quenching flaw happens easily and the like. According to the crankshaft assembly of the single cylinder motorcycle engine, two weight loss areas recessing inward are placed in symmetry mode at two sides of a crank eccentric hole, and two strengthening ribs are arranged in right-and-left symmetry mode on upper portion of the crank, along the direction of the circumference of the crank. The thickness t 2 of the crank strengthening ribs is 6.5 millimeters, the width w of the crank strengthening ribs is 6 millimeters, and the depth d of the weight loss areas on the right side and the left side of the crank. The crank structural strength of the crankshaft assembly of the single cylinder motorcycle engine is improved and the deformation is small after being stressed. The cooling speed of the quenching in the process of tempering heat treatment is slowed, the internal stress is released, and the rate of flaw and loss is reduced.
Description
Technical field
The utility model relates to a kind of motorcycle engine crankshaft, specially refers to a kind of single cylinder engine for motorcycle crank assemblby.
Background technique
Bent axle is one of most important part in the motor.Its function is that the straight reciprocating motion with piston changes rotation motion into, and output torque, drives the external equipment that connects with it, drives in addition the control mechanisms such as distribution device, ignition mechanism, speed regulating mechanism.
Usually, the single cylinder engine for motorcycle crank assemblby is the parts that are combined into by parts such as left and right bent axle, crank pin and connecting rods.Wherein, crank is semiaxis, is to be made of bar section cylindrical and disk body, and eccentric opening is arranged on the disk body, is used for the assembling crank pin.Form a revolute pair by needle bearing and connecting rod in the middle of the crank pin.Crank pin two links to each other with left and right crank by interference fit respectively.Crank is the most complicated stressed and link that structure is the weakest in the crank assemblby.Thin-walled place, the crank eccentric opening both sides thickness t of the single cylinder engine for motorcycle crank assemblby of prior art
1Be 4 mm only, have insufficient strength, the problem of stressed rear easy generation distortion.In addition, because crank thinnest part thickness is little, quench cooling rate is too fast in the heat treatment quenching and tempering process, easily produces stress concentration, and causes crackle, causes bent axle to scrap.
Summary of the invention
For overcoming the crank thin-walled place insufficient strength of prior art single cylinder engine for motorcycle crank assemblby, stressed rear easy generation distortion easily produces the problems such as quenching crack, the utility model proposes a kind of single cylinder engine for motorcycle crank assemblby.The utility model single cylinder engine for motorcycle crank assemblby, the loss of weight zone the setting of crank eccentric opening bilateral symmetry caves inward arranges symmetrical stiffening rib at crank along the circumferential top of crank, the thickness t of described crank stiffening rib
2Be 6.5 mm, width w is 6 mm; Limit, described crank left and right sides loss of weight regional depth d is 3.5 mm.
The useful technique effect of the utility model single cylinder engine for motorcycle crank assemblby is the crank structure strength increase, and stressed rear distortion is less; Quench cooling rate slows down in the heat treatment quenching and tempering process, and internal stress is discharged, and crackle rate and newspaper loss rate reduce.
Description of drawings
Accompanying drawing 1 is the schematic diagram of prior art single cylinder engine for motorcycle crank assemblby;
Accompanying drawing 3 is the schematic diagram of the utility model single cylinder engine for motorcycle crank assemblby;
Accompanying drawing 4 is the B-B section sectional drawing of accompanying drawing 3.
Below in conjunction with drawings and the specific embodiments the utility model single cylinder engine for motorcycle crank assemblby is described further.
Embodiment
Accompanying drawing 1 is the schematic diagram of prior art single cylinder engine for motorcycle crank assemblby, and accompanying drawing 2 is the A-A section sectional drawing of accompanying drawing 1, among the figure, and t
1Be crank thickness.There is figure as can be known, thin-walled place, the crank eccentric opening both sides thickness t of the single cylinder engine for motorcycle crank assemblby of prior art
1Be 4 mm only, have insufficient strength, the problem of stressed rear easy generation distortion.In addition, because crank thinnest part thickness is little, quench cooling rate is too fast in the heat treatment quenching and tempering process, easily produces stress concentration, and causes crackle, causes bent axle to scrap.
Accompanying drawing 3 is the schematic diagram of the utility model single cylinder engine for motorcycle crank assemblby, and accompanying drawing 4 is the B-B section sectional drawing of accompanying drawing 3, and among the figure, 1 is that left loss of weight district, 2 is that right loss of weight district, 3 is that left stiffening rib, 4 is right stiffening rib, t
2For crank thickness, w are that stiffening rib width, d are the degree of depth.As seen from the figure, the utility model single cylinder engine for motorcycle crank assemblby, the loss of weight zone the setting of crank eccentric opening bilateral symmetry caves inward arranges symmetrical stiffening rib at crank along the circumferential top of crank, the thickness t of described crank stiffening rib
2Be 6.5 mm, width w is 6 mm; Limit, described crank left and right sides loss of weight regional depth d is 3.5 mm.
The utility model increases stiffening rib 3,4 with crank the right and left on the prior art, so that the crank thickness t
2Change 6.5 mm into from 4 mm, and stiffening rib 3,4 width w are 6 mm, after improving, the intensity of crank and rigidity reinforced, stressed rear deformation disappears.Simultaneously, because the increase of crank the right and left thickness, quench cooling rate slows down in the heat treatment quenching and tempering process, and internal stress is discharged, and also just is not easy to crack, produce and scrap.In addition, crank is symmetrical set the loss of weight zone 1,2 that caves inward, and the depth d in loss of weight zone is 3.5 mm, more guarantees the relative mass balance of crank the right and left, has played better counterbalance effect.
Claims (1)
1. a single cylinder engine for motorcycle crank assemblby is characterized in that, the loss of weight zone the setting of crank eccentric opening bilateral symmetry caves inward arranges symmetrical stiffening rib at crank along the circumferential top of crank, the thickness t of described crank stiffening rib
2Be 6.5 mm, width w is 6 mm; Limit, described crank left and right sides loss of weight regional depth d is 3.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220238197 CN202646337U (en) | 2012-05-25 | 2012-05-25 | Crankshaft assembly of single cylinder motorcycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220238197 CN202646337U (en) | 2012-05-25 | 2012-05-25 | Crankshaft assembly of single cylinder motorcycle engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202646337U true CN202646337U (en) | 2013-01-02 |
Family
ID=47415451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220238197 Expired - Lifetime CN202646337U (en) | 2012-05-25 | 2012-05-25 | Crankshaft assembly of single cylinder motorcycle engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202646337U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864273A (en) * | 2016-05-31 | 2016-08-17 | 中国嘉陵工业股份有限公司（集团） | Crank of motorcycle engine with large discharge capacity and balance shaft |
-
2012
- 2012-05-25 CN CN 201220238197 patent/CN202646337U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864273A (en) * | 2016-05-31 | 2016-08-17 | 中国嘉陵工业股份有限公司（集团） | Crank of motorcycle engine with large discharge capacity and balance shaft |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201258906Y (en) | Ultralight crankshaft | |
| CN201273357Y (en) | Novel crankshaft torsion vibration absorber of car engine | |
| CN101144425A (en) | Double connecting bar power output device for engine | |
| CN202646337U (en) | Crankshaft assembly of single cylinder motorcycle engine | |
| CN201851585U (en) | Diesel engine crankshaft balance assembly | |
| CN202790052U (en) | Crankshaft for engine | |
| CN203114876U (en) | Back end driving crankshaft component of six-cylinder diesel | |
| CN2667177Y (en) | Double-crankshaft symmetrical double-link bar piston mechanism with crankshaft synchronous gear | |
| CN105626771A (en) | Variable balance shaft system of engine | |
| CN202926857U (en) | Crankshaft with light weight of miniature automobile engine | |
| CN201827315U (en) | Combined type crankshaft connecting rod mechanism | |
| CN201723646U (en) | Novel elementary substance bimodule crankshaft torsional vibration damper | |
| CN104712705B (en) | A kind of crankshaft of diesel engine flywheel assembly | |
| CN208057670U (en) | A kind of engine crankshaft and engine | |
| CN206309859U (en) | Balance shaft | |
| CN203640849U (en) | Diesel engine cylinder with eccentric main bearing block hole structure | |
| CN203542526U (en) | Hydraulic rapping bar of diesel engine | |
| CN203585049U (en) | Novel crankshaft | |
| CN204961565U (en) | A many link drives bent axle for engine | |
| CN204921663U (en) | Bent axle part of many link drives | |
| CN107391779B (en) | A kind of blank shape design method of die forging crankshaft of diesel engine | |
| CN203743178U (en) | Small-displacement universal power engine crankshaft crank throw shoulder structure | |
| CN209385578U (en) | A kind of high stability balance shaft | |
| CN203962672U (en) | A kind of wedge shape small end con rod | |
| CN201218269Y (en) | Crankshaft of medium and small power diesel engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |
|
| CX01 | Expiry of patent term |