CN203809492U - Crankshaft of highly strengthened diesel engine - Google Patents
Crankshaft of highly strengthened diesel engine Download PDFInfo
- Publication number
- CN203809492U CN203809492U CN201420197858.7U CN201420197858U CN203809492U CN 203809492 U CN203809492 U CN 203809492U CN 201420197858 U CN201420197858 U CN 201420197858U CN 203809492 U CN203809492 U CN 203809492U
- Authority
- CN
- China
- Prior art keywords
- crankweb
- crank pin
- diesel engine
- crankshaft
- arc
- 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 - Fee Related
Links
Abstract
The utility model discloses a crankshaft of a highly strengthened diesel engine. The crankshaft comprises a crank pin, a left crank arm, a right crank arm, a main shaft neck and a power output shaft, wherein the tops of the left and right crank arms are arc-shaped bulges; an arc-shaped groove is formed in the connecting part between the top of the left crank arm and the crank pin as well as in that between the top of the right crank arm and the crank pin; the arc-shaped bulges are tangent to the arc-shaped grooves; an unloading groove is formed in the inner side of the left crank arm as well as in that of the right crank arm; the connecting part between the crank pin and the left crank arm as well as that between the crank pin and the right crank arm is a R angle; a quench hardening layer and a nitrogenization layer are coated on the surfaces of the crank pin and the R angle. According to the crankshaft of the highly strengthened diesel engine, the bent fatigue strength is improved and the resource is saved.
Description
Technical field
The utility model belongs to parts and components of diesel engine technical field, especially relates to a kind of high strength crankshaft of diesel engine.
Background technique
The main rotary gadget of crankshaft engine, loads onto after connecting rod, and upper and lower (back and forth) motion that can accept connecting rod becomes circulation (rotation) motion.Bent axle is important parts on motor, and wherein the intensity of crank pin and main journal is very important, and crankshaft breakdown is the serious parts fault of motor, and fracture generally occurs in the joint iso-stress of crank pin and main journal and crankweb and concentrates position.Common processing mode is the mode that adopts thickening overstriking at easy stress raiser, and this settling mode not only compares consumable material, and has reduced the flexibility of bent axle, brings certain defect.
Model utility content
The purpose of this utility model is to solve the deficiencies in the prior art part, and the high strength crankshaft of diesel engine that provides a kind of its bending fatigue strength to improve.
The purpose of this utility model solves by following technical proposal:
A kind of high strength crankshaft of diesel engine, comprise crank pin, left crankweb, right crankweb, main journal and pto＝power take-off, it is characterized in that: described left crankweb and right crankweb top are arc-shaped convex, left crankweb and right crankweb top and crank pin joint respectively have a circular groove, and described arc-shaped convex and circular groove are tangent; Described left crankweb and right crankweb inner side are respectively provided with a spron; Described crank pin and left crankweb and right crankweb joint are R angle, and crank pin and R angle surface are shaped with a laser quenching hardened layer, and crank pin and R angle surface are shaped with a nitride layer.
The tranverse sectional thickness at the circular groove place at left crankweb described in the utility model and right crankweb top is less than or equal to 9mm.
The degree of depth of spron described in the utility model is 5mm.
The thickness of laser quenching hardened layer described in the utility model is 2 ~ 4mm.
Nitride layer thickness described in the utility model is more than or equal to 0.25mm.
Compared to the prior art the utlity model has following characteristics and beneficial effect:
1, by the reduced thickness of crankweb both sides, make its tranverse sectional thickness≤9mm, crankweb inner side has additional spron groove depth 5mm, by the improvement at this two place, increase the penetrability that the quenching of crankweb makes, make its quench hardened case more even, improve the intensity of product, learn by fatigue bending test, take after the improvement and quenching technical of this two places structure, its bending fatigue strength is than front having improved 30%.
2, crank pin and left crankweb and right crankweb joint are R angle, ensure being smoothly connected of its transition position.
3, the spron of left and right crankweb inner side has been eliminated the internal stress of crank pin and left and right crankweb joint, avoids stress to concentrate, and makes bent axle longer service life.
4, induction hardening and surfaces nitrided technique compound use, make bent axle performance better.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further details.
As shown in Figure 1, a kind of high strength crankshaft of diesel engine, comprises crank pin 1, left crankweb 2, right crankweb 3, main journal 4 and pto＝power take-off 5.Described left crankweb 2 and right crankweb 3 tops are arc-shaped convex 6, and left crankweb 2 and right crankweb 3 tops and crank pin 1 joint respectively have a circular groove 7, and described arc-shaped convex 6 and circular groove 7 are tangent.The reduced thickness of crankweb both sides, the tranverse sectional thickness at circular groove 7 places at described left crankweb 2 and right crankweb 3 tops is less than or equal to 9mm.Described left crankweb 2 and right crankweb 3 inner sides are respectively provided with a spron 8.The degree of depth of described spron 8 is 5mm.
By the reduced thickness of crankweb both sides, make its tranverse sectional thickness≤9mm, crankweb inner side has additional spron groove depth 5mm, by the improvement at this two place, increase the penetrability that the quenching of left and right crankweb makes, make its quench hardened case more even, improve the intensity of product, learn by fatigue bending test, take after the improvement and quenching technical of this two places structure, its bending fatigue strength is than front having improved 30%.
Described crank pin 1 is R angle 9 with left crankweb 2 and right crankweb 3 joints.Ensure being smoothly connected of its transition position, can avoid stress to concentrate.
Crank pin 1 and 9 surfaces, R angle are shaped with a laser quenching hardened layer 10, and crank pin 1 and 9 surfaces, R angle are shaped with a nitride layer 11.The thickness of described laser quenching hardened layer 10 is 2 ~ 4mm.Described nitride layer 11 thickness are more than or equal to 0.25mm.Crank pin 1 and R angle 9 are carried out to induction hardening processing and surfaces nitrided technique simultaneously, can improve the intensity of bent axle.
The utility model bending fatigue strength improves, and can avoid stress to concentrate, and reduces the use of material simultaneously, economizes on resources.
Claims (5)
1. a high strength crankshaft of diesel engine, comprise crank pin, left crankweb, right crankweb, main journal and pto＝power take-off, it is characterized in that: described left crankweb and right crankweb top are arc-shaped convex, left crankweb and right crankweb top and crank pin joint respectively have a circular groove, and described arc-shaped convex and circular groove are tangent; Described left crankweb and right crankweb inner side are respectively provided with a spron; Described crank pin and left crankweb and right crankweb joint are R angle, and crank pin and R angle surface are shaped with a laser quenching hardened layer, and crank pin and R angle surface are shaped with a nitride layer.
2. high strength crankshaft of diesel engine according to claim 1, is characterized in that: the tranverse sectional thickness at the circular groove place at described left crankweb and right crankweb top is less than or equal to 9mm.
3. high strength crankshaft of diesel engine according to claim 1, is characterized in that: the degree of depth of described spron is 5mm.
4. high strength crankshaft of diesel engine according to claim 1, is characterized in that: the thickness of described laser quenching hardened layer is 2 ~ 4mm.
5. high strength crankshaft of diesel engine according to claim 1, is characterized in that: described nitride layer thickness is more than or equal to 0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197858.7U CN203809492U (en) | 2014-04-23 | 2014-04-23 | Crankshaft of highly strengthened diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420197858.7U CN203809492U (en) | 2014-04-23 | 2014-04-23 | Crankshaft of highly strengthened diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203809492U true CN203809492U (en) | 2014-09-03 |
Family
ID=51448249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420197858.7U Expired - Fee Related CN203809492U (en) | 2014-04-23 | 2014-04-23 | Crankshaft of highly strengthened diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203809492U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179453A (en) * | 2015-07-16 | 2015-12-23 | 浙江瑞朗锻造有限公司 | Multi-connecting-rod transmission crankshaft component |
| CN105179452A (en) * | 2015-07-16 | 2015-12-23 | 浙江瑞朗锻造有限公司 | Crankshaft structure of engine |
-
2014
- 2014-04-23 CN CN201420197858.7U patent/CN203809492U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105179453A (en) * | 2015-07-16 | 2015-12-23 | 浙江瑞朗锻造有限公司 | Multi-connecting-rod transmission crankshaft component |
| CN105179452A (en) * | 2015-07-16 | 2015-12-23 | 浙江瑞朗锻造有限公司 | Crankshaft structure of 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20180423 |