CN114962428A - Four-cylinder lightweight crankshaft - Google Patents
Four-cylinder lightweight crankshaft Download PDFInfo
- Publication number
- CN114962428A CN114962428A CN202210665346.8A CN202210665346A CN114962428A CN 114962428 A CN114962428 A CN 114962428A CN 202210665346 A CN202210665346 A CN 202210665346A CN 114962428 A CN114962428 A CN 114962428A
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- China
- Prior art keywords
- groove
- crank
- weight
- crankshaft
- journal
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- 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.)
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Classifications
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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
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/06—Crankshafts
- F16C3/10—Crankshafts assembled of several parts, e.g. by welding by crimping
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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
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/04—Crankshafts, eccentric-shafts; Cranks, eccentrics
- F16C3/20—Shape of crankshafts or eccentric-shafts having regard to balancing
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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
- F16C2360/00—Engines or pumps
- F16C2360/22—Internal combustion engines
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention belongs to the field of internal combustion engine equipment, and particularly relates to a four-cylinder lightweight crankshaft, wherein each crank throw of the crankshaft consists of a main journal, a first crank, a connecting rod journal, a second crank and the main journal which are sequentially connected, and one end of the first crank is provided with a balance weight. The crank thickness of the two ends of the connecting rod neck of the crankshaft is gradually reduced, the weight of the crankshaft is favorably reduced, the second weight reduction groove is arranged in the area outside the dangerous section, the weight reduction groove is located at the non-stressed position of the crankshaft, the weight of the crankshaft can be further reduced, the strength of the crankshaft cannot be influenced, the internal consumption can be reduced, fuel oil is saved, and the technical effect of improving the operating efficiency of the internal combustion engine is achieved.
Description
Technical Field
The invention belongs to the field of internal combustion engine equipment, and particularly relates to a four-cylinder lightweight crankshaft.
Background
The crankshaft is one of the key parts on the automobile engine, and the structure and the weight of the crankshaft directly influence the oil consumption and the stability of the automobile engine. On one hand, the performance of the crankshaft is required to be higher and higher by various engine manufacturers, and on the other hand, the crankshaft is required to be lighter and lower, and the cost is required to be lower and lower. In view of the above, it is desirable to reduce the weight of the crankshaft and reduce the fuel consumption while ensuring the performance of the crankshaft is satisfactory.
Disclosure of Invention
The invention aims to provide a four-cylinder lightweight crankshaft which has light weight, can meet the working strength and can improve the operating efficiency of an internal combustion engine.
The technical scheme for achieving the purpose comprises the following contents.
A four-cylinder lightweight crankshaft comprises 4 crank throws, wherein each crank throw comprises a main journal, a first crank, a connecting rod journal, a second crank and a main journal which are sequentially connected, a balance weight is arranged at one end of the first crank, the axial thicknesses of the first crank and the second crank at two ends of the connecting rod journal are gradually reduced along the radial direction, a first weight reduction groove is formed in the outer side surface of the connecting part of the first crank and the main journal, a second weight reduction groove is formed in the outer side surface of the connecting part of the first crank and the connecting rod journal, the second weight reduction groove is formed in the region outside a dangerous section, and the dangerous section refers to the position where the stress borne by the crankshaft is the largest in the working state.
Further, the first lightening groove is perpendicular to a connecting line of the main journal and the center of the connecting rod journal, and the width of the first lightening groove is gradually increased from the center to two ends of the groove.
Further, the central width B of the first weight-reducing groove is 15-25 mm.
Further, the second lightening groove is composed of a first groove section and a second groove section which are not connected, and the first groove section and the second groove section are symmetrically arranged relative to a connecting line of the centers of the main journal and the connecting rod journal.
Further, the distance F between the first groove and the second groove is 20-40 mm. And maintaining proper spacing is equivalent to adding reinforcing ribs in the radial direction.
Further, the width E of the first groove is 30-40 mm.
Further, the depth of the first groove is 10-15 mm.
Furthermore, a third weight-reducing groove is formed in the outer side face of the connecting part of the second crank and the connecting rod neck, and the third weight-reducing groove is formed in the area outside the dangerous section.
Further, the third lightening groove and the second lightening groove are the same in shape.
Furthermore, a fourth weight-reducing groove is formed in the outer side face of the connecting portion of the second crank and the main journal.
The crank thicknesses at two ends of the connecting rod neck of the four-cylinder lightweight crankshaft are gradually reduced, the weight of the crankshaft is favorably reduced, the second weight-reducing groove is arranged in the region outside the dangerous section, the weight-reducing groove is positioned at the non-stressed position of the crankshaft, the weight of the crankshaft can be further reduced, the strength of the crankshaft cannot be influenced, the internal consumption can be reduced, fuel oil is saved, and the technical effect of improving the operating efficiency of an internal combustion engine is achieved.
Drawings
FIG. 1 is a schematic structural view of a four-cylinder lightweight crankshaft according to an embodiment of the present invention;
FIG. 2 is a schematic view of a first crank of the embodiment of the present invention;
FIG. 3 is a schematic hazardous cross-sectional view of a crankshaft.
In the figure, 1 main journal; 2. a connecting rod neck; 3. a first crank; 3-1, a first weight-reducing slot; 3-2. a second weight-reducing slot; 3-3, balancing weight; 4. a second crank; 4-1. a third weight-reducing slot; 4-2. fourth lightening slots, the shaded portion of figure 3 being the dangerous section position of the crankshaft.
Detailed Description
The present invention will be described in detail with reference to examples.
Referring to fig. 1 to 3, a four-cylinder lightweight crankshaft comprises 4 crank throws, each crank throw comprises a main journal 1, a first crank 3, a connecting rod journal 2, a second crank 4 and a main journal 1 which are sequentially connected, a balance weight 3-3 is arranged at one end of the first crank 3, the thicknesses of the first crank 3 and the second crank 4 at two ends of the connecting rod journal 2 in the axial direction gradually decrease in the radial direction, a first weight-reducing groove 3-1 is formed in the outer side surface of the connecting part of the first crank 3 and the main journal 1, a second weight-reducing groove 3-2 is formed in the outer side surface of the connecting part of the first crank 3 and the connecting rod journal 2, and the second weight-reducing groove 3-2 is formed in the area outside a dangerous section; the first weight-reducing groove 3-1 is vertical to a connecting line of the main journal 1 and the center of the connecting rod journal 2, the width of the first weight-reducing groove 3-1 is gradually increased from the center to two ends of the groove, and the center width B of the first weight-reducing groove 3-1 is 20 mm; the second weight-reducing groove 3-2 is composed of a first groove and a second groove which are not connected, the first groove and the second groove are symmetrically arranged about a connecting line of the centers of the main journal 1 and the connecting rod journal 2, the distance F between the first groove and the second groove is 30mm, the width E of the first groove is 35mm, and the depth of the first groove is 12.5 mm; the outer side surface of the connecting part of the second crank 4 and the connecting rod neck 2 is provided with a third weight-reducing groove 4-1, the third weight-reducing groove 4-1 is arranged in the area outside the dangerous section, the shape of the third weight-reducing groove 4-1 is the same as that of the second weight-reducing groove 3-2, and the outer side surface of the connecting part of the second crank 4 and the main journal 1 is provided with a fourth weight-reducing groove 4-2.
The four-cylinder lightweight crankshaft has the advantages that the shoulder parts of the crank throws are gradually narrowed along the radial direction, four groups of weight reduction grooves are formed in the non-stressed position of the crankshaft to achieve crankshaft lightweight, meanwhile, the strength of the crankshaft is guaranteed not to change, energy consumption can be effectively reduced, and the operating efficiency of an internal combustion engine is improved.
Claims (10)
1. A four-cylinder lightweight crankshaft comprises 4 cranks, each crank comprises a main journal, a first crank, a connecting rod journal, a second crank and a main journal which are sequentially connected, and a balance weight is arranged at one end of the first crank.
2. The four-cylinder lightweight crankshaft according to claim 1, wherein the first lightening groove is perpendicular to a line connecting centers of the main journals and the connecting journals, and a width of the first lightening groove gradually increases from the center to both ends of the groove.
3. The four-cylinder lightweight crankshaft according to claim 2, wherein a central width B of the first weight-reduction groove is 15 to 25 mm.
4. The four-cylinder lightweight crankshaft according to claim 1, wherein the second lightening groove is composed of two sections of grooves, i.e., a groove one and a groove two, which are not connected, and the groove one and the groove two are symmetrically arranged with respect to a line connecting centers of the main journal and the connecting journal.
5. The four-cylinder lightweight crankshaft according to claim 4, wherein a distance F between the first groove and the second groove is 20 to 40 mm.
6. The four-cylinder lightweight crankshaft according to claim 4, wherein a width E of the first groove is 30 to 40 mm.
7. The four-cylinder lightweight crankshaft according to claim 4, wherein a depth of the first groove is 10 to 15 mm.
8. The four-cylinder lightweight crankshaft according to claim 1, wherein an outer side surface of a portion where the second crank and the connecting rod journal are connected is provided with a third weight-reduction groove, and the third weight-reduction groove is provided in a region other than the dangerous cross section.
9. The four-cylinder lightweight crankshaft according to claim 8, wherein the third weight-reduction groove is identical in shape to the second weight-reduction groove.
10. The four-cylinder lightweight crankshaft according to claim 1, wherein a fourth weight-reduction groove is provided in an outer side surface of a portion where the second crank and the main journal are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210665346.8A CN114962428A (en) | 2022-06-14 | 2022-06-14 | Four-cylinder lightweight crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210665346.8A CN114962428A (en) | 2022-06-14 | 2022-06-14 | Four-cylinder lightweight crankshaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114962428A true CN114962428A (en) | 2022-08-30 |
Family
ID=82972370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210665346.8A Pending CN114962428A (en) | 2022-06-14 | 2022-06-14 | Four-cylinder lightweight crankshaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114962428A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070051197A1 (en) * | 2005-09-02 | 2007-03-08 | Toyota Jidosha Kabushiki Kaisha | Crankshaft of in-line four-cylinder engine |
| JP2009197929A (en) * | 2008-02-22 | 2009-09-03 | Honda Motor Co Ltd | Crankshaft |
| CN201531516U (en) * | 2009-09-29 | 2010-07-21 | 上汽通用五菱汽车股份有限公司 | Crank shaft capable of reducing overall weight |
| JP2010230027A (en) * | 2009-03-26 | 2010-10-14 | Honda Motor Co Ltd | Crankshaft and method for manufacturing the same |
| CN105637241A (en) * | 2013-10-16 | 2016-06-01 | 新日铁住金株式会社 | Crankshaft for reciprocating engine |
-
2022
- 2022-06-14 CN CN202210665346.8A patent/CN114962428A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070051197A1 (en) * | 2005-09-02 | 2007-03-08 | Toyota Jidosha Kabushiki Kaisha | Crankshaft of in-line four-cylinder engine |
| JP2009197929A (en) * | 2008-02-22 | 2009-09-03 | Honda Motor Co Ltd | Crankshaft |
| JP2010230027A (en) * | 2009-03-26 | 2010-10-14 | Honda Motor Co Ltd | Crankshaft and method for manufacturing the same |
| CN201531516U (en) * | 2009-09-29 | 2010-07-21 | 上汽通用五菱汽车股份有限公司 | Crank shaft capable of reducing overall weight |
| CN105637241A (en) * | 2013-10-16 | 2016-06-01 | 新日铁住金株式会社 | Crankshaft for reciprocating engine |
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