CN204003925U - Crankshaft for gasoline engine - Google Patents
Crankshaft for gasoline engine Download PDFInfo
- Publication number
- CN204003925U CN204003925U CN201420380641.XU CN201420380641U CN204003925U CN 204003925 U CN204003925 U CN 204003925U CN 201420380641 U CN201420380641 U CN 201420380641U CN 204003925 U CN204003925 U CN 204003925U
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- crank
- main journal
- crankshaft
- gasoline engine
- bent axle
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Abstract
The utility model discloses a kind of crankshaft for gasoline engine, comprise main journal, connecting rod neck, crank and be correspondingly one by one arranged at the equilibrium block on crank, the thickness of crank is reduced to top gradually by root, crank root and top are 22mm-26mm by the radius of arc surface transition and arc surface, crank and main journal joint are provided with duplicate removal groove and this duplicate removal groove depth scope is 7.5mm-9mm, width range is 10-14mm, the bent axle of this structure can effectively lower bent axle deadweight, can ensure that again bent axle has good balance quality, structural strength simultaneously.
Description
Technical field
The utility model relates to auto parts and components field, specifically a kind of crankshaft for gasoline engine.
Background technique
Bent axle is one of most important moving element in motor, and its quality accounts for 10% of complete machine.Cost accounts for 10%～12% of complete machine.Its dimensional parameters and weight determine and affect overall dimension and the weight of internal-combustion engine to a great extent, the reliability of internal-combustion engine and life-span are also depended on the quality of bent axle performance to a great extent, undue oscillation when preventing from rotating, bent axle must be by balance exactly.For this reason, bent axle can comprise a series of balancer weight, and it makes each crankpin, the piston being associated, piston rod and the mass balance of the oiling agent that enters.Therefore, it is very large that the quality of bent axle becomes conventionally, is unfavorable for the lightweight of car load and the control of manufacture cost.
Therefore, for overcoming the above problems, need one can effectively lower bent axle deadweight, can ensure that again bent axle has good balance quality, the crankshaft for gasoline engine of structural strength simultaneously.
Model utility content
In view of this, the purpose of this utility model is to overcome defect of the prior art, provides one can effectively lower bent axle deadweight, can ensure that again bent axle has good balance quality, the crankshaft for gasoline engine of structural strength simultaneously.
Crankshaft for gasoline engine of the present utility model, comprise main journal, connecting rod neck, crank and be correspondingly one by one arranged at the equilibrium block on crank, the thickness of crank is reduced to top gradually by root, crank root and top are 22mm-26mm by the radius of arc surface transition and arc surface, crank and main journal joint are provided with duplicate removal groove and this duplicate removal groove depth scope is 7.5mm-9mm, and width range is 10-14mm;
Further, between described main journal and crank, between connecting rod neck and crank all by roll extrusion round-corner transition, the width range of roll extrusion fillet is 2mm-2.5mm, the depth bounds of roll extrusion fillet is 0.2-0.6mm, the axial angular range of roll extrusion fillet arcuate midway point between main journal and crank and the line in the center of circle and main journal is 55 °-60 °, and the axial angular range of the roll extrusion fillet arcuate midway point between connecting rod neck and crank and the line in the center of circle and main journal is 50 °-56 °;
Further, to be provided with the proportion of boss and this boss and main journal diameter be 0.16-0.2 at described crank two ends; The proportion of the Extreme breadth of described crank and main journal diameter is 1.4-1.55;
Further, also comprise the main oil gallery that radially runs through main journal and the oblique oil duct that is communicated with cylndrical surface, main journal lower end and cylndrical surface, rod journal upper end; Described main oil gallery and main journal laterally folded angular range are 28 °-30 °; The folded angular range of described oblique oil duct and crank symmetrical center line is 24 °-25 °; Described oblique oil duct and main journal axially folded angular range are 60 °-63 °;
Further, this bent axle is made by QT700 or QT800;
Further, adopting the discharge capacity of motor of this bent axle and the proportion of described equilibrium block radius is 19-22ml/mm.
The beneficial effects of the utility model are: crankshaft for gasoline engine of the present utility model, by in crank shoulder duplicate removal, and by arc surface transition, thereby reduce the deadweight of crank, avoid loss of weight part to occur that stress is concentrated simultaneously, ensure the structural strength of crank, on the other hand, crank and main journal joint are provided with duplicate removal groove, can further reduce bent axle deadweight, simultaneously, scope selects the hierarchy structure of duplicate removal groove realizing under the light-weighted object of bent axle according to the rules, ensure the intensity of bent axle, avoid producing the waste of material, improve engine performance, fuel economy and reduction discharge.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the sectional view at C place in Fig. 1;
Fig. 3 is the sectional view at D place in Fig. 1;
Fig. 4 is the sectional view at E place in Fig. 3;
Fig. 5 is the partial enlarged drawing at A place in Fig. 1;
Fig. 6 is the partial enlarged drawing at B place in Fig. 1.
Embodiment
Fig. 1 is structural representation of the present utility model, and Fig. 2 is the sectional view at C place in Fig. 1, Fig. 3 is the sectional view at D place in Fig. 1, Fig. 4 is the sectional view at E place in Fig. 3, Fig. 5 is the partial enlarged drawing at A place in Fig. 1, Fig. 6 is the partial enlarged drawing at B place in Fig. 1, as shown in the figure, crankshaft for gasoline engine in the present embodiment, comprise main journal 1, connecting rod neck 3, crank 2 and one by one correspondence are arranged at the equilibrium block 4 on crank 2, the thickness of crank 2 is reduced to top gradually by root, crank 2 roots and top are 22mm-26mm by the radius of arc surface transition and arc surface, crank 2 is provided with duplicate removal groove 5 with main journal 1 joint and this duplicate removal groove 5 depth boundses are 7.5mm-9mm, width range is 10-14mm, by in crank 2 shoulder duplicate removals, and by arc surface transition, thereby reduce the deadweight of crank 2, avoid loss of weight part to occur that stress is concentrated simultaneously, ensure the structural strength of crank 2, on the other hand, crank 2 is provided with duplicate removal groove 5 with main journal 1 joint, can further reduce bent axle deadweight, simultaneously, scope selects the hierarchy structure of duplicate removal groove 5 realizing under the light-weighted object of bent axle according to the rules, ensure the intensity of bent axle, avoid producing the waste of material, improve engine performance, fuel economy and reduction discharge.
In the present embodiment, between described main journal 1 and crank 2, between connecting rod neck 3 and crank 2 all by roll extrusion round-corner transition, as Fig. 4, shown in Fig. 5, the width range of roll extrusion fillet is 2mm-2.5mm, the depth bounds of roll extrusion fillet is 0.2-0.6mm, the axial angle of roll extrusion fillet arcuate midway point between main journal 1 and crank 2 and the line in the center of circle and main journal 1 (in Fig. 4 shown in a) scope is 55 °-60 °, the axial angle of roll extrusion fillet arcuate midway point between connecting rod neck 3 and crank 2 and the line in the center of circle and main journal 1 (in Fig. 5 shown in b) scope is 50 °-56 °, crankshaft fillet rolling and reinforcing technology is to improve one of the most effective means of crankshaft fatigue strength, it is the critical process of realizing bent axle " with iron for steel ", greatly improve the safety coefficient of bent axle, simultaneously, the angle of roll extrusion can make the stress distribution at fillet place comparatively even in above-mentioned angular range, ensure to there is higher join strength between crank 2 and main journal 1 and connecting rod neck 3.
In the present embodiment, described crank 2 two ends are provided with boss 8 and this boss 8 is 0.16-0.2 with the proportion of main journal 1 diameter; The proportion of the Extreme breadth of described crank 2 and main journal 1 diameter is 1.4-1.55, ensures that crank 2 has higher bending and torsion rigidity.
In the present embodiment, also comprise the main oil gallery 7 that radially runs through main journal 1 and the oblique oil duct 6 that is communicated with main journal 1 cylndrical surface, lower end and rod journal 3 cylndrical surface, upper end; Described main oil gallery 7 and main journal 1 laterally folded angle (in Fig. 2 shown in α) scope are 28 °-30 °; The folded angle of described oblique oil duct 6 and crank 2 symmetrical center line (in Fig. 3 shown in β) scope is 24 °-25 °; Described oblique oil duct 6 and main journal 1 axially folded angle (in Fig. 4 shown in Δ) scope are 60 °-63 °, this oil duct setting type makes connecting rod neck 3 oilholes be located at low load region, improve the supply capability to connecting rod neck 3, meanwhile, oil duct is weakened minimum to crankshaft journal flexural strength.
In the present embodiment, this bent axle is made by QT700 or QT800, and it is good that the bent axle that adopts this material to make bears overload capacity, and cost is far below forged steel crankshaft.
In the present embodiment, adopting the discharge capacity of motor and the proportion of described equilibrium block 4 radiuses of this bent axle is 19-22ml/mm, make the center of gravity of equilibrium block 4 as far as possible away from crankshaft rotating center, lighter equilibrium block 4 weight reach good counterbalance effect, alleviate as far as possible bent axle weight.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (6)
1. a crankshaft for gasoline engine, comprise main journal, connecting rod neck, crank and be correspondingly one by one arranged at the equilibrium block on crank, it is characterized in that: the thickness of described crank is reduced to top gradually by root, crank root and top are 22mm-26mm by the radius of arc surface transition and arc surface, described crank and main journal joint are provided with duplicate removal groove and this duplicate removal groove depth scope is 7.5mm-9mm, and width range is 10-14mm.
2. crankshaft for gasoline engine according to claim 1, is characterized in that: between described main journal and crank, between connecting rod neck and crank all by roll extrusion round-corner transition; The width range of described roll extrusion fillet is 2mm-2.5mm, the depth bounds of roll extrusion fillet is 0.2-0.6mm, the axial angular range of roll extrusion fillet arcuate midway point between main journal and crank and the line in the center of circle and main journal is 55 °-60 °, 50 °-56 ° of the axial angular range of the roll extrusion fillet arcuate midway point between connecting rod neck and crank and the line in the center of circle and main journal.
3. crankshaft for gasoline engine according to claim 2, is characterized in that: the proportion that described crank two ends are provided with boss and this boss and main journal diameter is 0.16-0.2; The proportion of the Extreme breadth of described crank and main journal diameter is 1.4-1.55.
4. crankshaft for gasoline engine according to claim 3, is characterized in that: also comprise the main oil gallery that radially runs through main journal and the oblique oil duct that is communicated with cylndrical surface, main journal lower end and cylndrical surface, rod journal upper end; Described main oil gallery and main journal laterally folded angular range are 28 °-30 °; The folded angular range of described oblique oil duct and crank symmetrical center line is 24 °-25 °; Described oblique oil duct and main journal axially folded angular range are 60 °-63 °.
5. crankshaft for gasoline engine according to claim 4, is characterized in that: this bent axle is made by QT700 or QT800.
6. crankshaft for gasoline engine according to claim 5, is characterized in that: adopting the discharge capacity of motor of this bent axle and the proportion of described equilibrium block radius is 19-22ml/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420380641.XU CN204003925U (en) | 2014-07-10 | 2014-07-10 | Crankshaft for gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420380641.XU CN204003925U (en) | 2014-07-10 | 2014-07-10 | Crankshaft for gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204003925U true CN204003925U (en) | 2014-12-10 |
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ID=52043932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420380641.XU Active CN204003925U (en) | 2014-07-10 | 2014-07-10 | Crankshaft for gasoline engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN204003925U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332993A (en) * | 2015-11-17 | 2016-02-17 | 无锡市新华起重工具有限公司 | Shaft end oil hole structure |
| CN110617268A (en) * | 2019-09-29 | 2019-12-27 | 重庆长安汽车股份有限公司 | Engine crankshaft and vehicle |
-
2014
- 2014-07-10 CN CN201420380641.XU patent/CN204003925U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332993A (en) * | 2015-11-17 | 2016-02-17 | 无锡市新华起重工具有限公司 | Shaft end oil hole structure |
| CN110617268A (en) * | 2019-09-29 | 2019-12-27 | 重庆长安汽车股份有限公司 | Engine crankshaft and vehicle |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |