CN207935268U - A kind of crankshaft for gasoline engine - Google Patents
A kind of crankshaft for gasoline engine Download PDFInfo
- Publication number
- CN207935268U CN207935268U CN201820235377.9U CN201820235377U CN207935268U CN 207935268 U CN207935268 U CN 207935268U CN 201820235377 U CN201820235377 U CN 201820235377U CN 207935268 U CN207935268 U CN 207935268U
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- China
- Prior art keywords
- crank
- connecting rod
- bent axle
- neck boss
- crankshaft
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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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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model is related to a kind of crankshaft for gasoline engine, including front end axis, trunnion, rod journal, crank, rear axle, it is characterized in that：The position being connected with the rod journal on the crank is equipped with connecting rod neck boss, the top profile of the connecting rod neck boss and top profile of crank is coplanar, profile is V-shaped；And left end projection of the connecting rod neck boss on crank side projects the straight line to be formed with right end and is overlapped with the width of the crank.It can increase the torsion stiffness of bent axle；The weight and cost of bent axle can be mitigated；Facilitate crank shaft blank depanning.
Description
Technical field
The utility model is related to automobile engines, and in particular to a kind of crankshaft for gasoline engine.
Background technology
Bent axle is one of main motion parts of internal combustion engine, and main function is to be transformed into the reciprocating motion of connecting rod piston
Rotary motion drives other trains of mechanism of engine to operate, to provide power for the operation of vehicle.
In internal combustion engine operation, the power that size and Orientation is in Complicated Periodic variation is acted on each of bent axle turns, because
This bent axle will produce torsional deflection, and the vibration of entire bent axle shafting can be influenced when the torsion stiffness of bent axle is inadequate, is gently then caused
Noise is heavy then bent axle is made to twist off.General bent axle upper edge crank width direction is the position for being easiest to twist off, along crank width
The section in direction is the dangerouse cross-section of bent axle.To mitigate crankshaft torsion deformation, can be realized by improving the rigidity of bent axle；
Under the premise of not being modified to other Surrounding Parts, traditional method is all to use the higher material of material trademark grade,
Or increasing crank width, these methods can cause increasing considerably for bent axle cost and weight.Some is set on crank
Count connecting rod neck boss step, referring to Fig. 1 and Fig. 2 shown in existing crankshaft for gasoline engine, including former front end axis 1, former main shaft
The orthographic projection of neck 2, former rod journal 3, former crank 4, former rear axle 5, the former connecting rod neck boss 41 on former crank 4 is round；Again
As disclosed in CN107120350A " near-net-shape casting forging bent axle ", the orthographic projection of connecting rod boss is equally rounded；All to bent axle
Torsion stiffness improve unobvious, it is therefore desirable to existing crankshaft for gasoline engine is improved.
Invention content
The purpose of this utility model is to provide a kind of crankshaft for gasoline engine, can increase the torsion stiffness of bent axle；Energy
Enough mitigate the weight and cost of bent axle；Facilitate crank shaft blank depanning.
A kind of crankshaft for gasoline engine described in the utility model, including front end axis, trunnion, rod journal, crank, after
Axis is held, it is characterized in that：The position being connected with the rod journal on the crank is equipped with connecting rod neck boss, the connecting rod neck boss
The top profile of top profile and crank is coplanar, profile is V-shaped；And left end of the connecting rod neck boss on crank side
Projection projects the straight line to be formed with right end and is overlapped with the width of the crank.
Further, the lower end of the connecting rod neck boss is projected on the die parting line of the crank.
The beneficial technique effect of the utility model：
Since the profile of connecting rod neck boss is designed forming V-shape and left end throwing of the connecting rod neck boss on crank side
Shadow projects the straight line to be formed with right end and is overlapped with the width of crank, increases the area of bent axle dangerouse cross-section, to increase song
The torsion stiffness of axis；When the torsion stiffness of bent axle is met the requirements, mitigate weight by reducing crank width to reach
Purpose；Since the lower end of connecting rod neck boss is projected on the die parting line of crank, connecting rod neck boss will not interfere with bent axle depanning, convenient
Crank shaft blank depanning from mold.
Description of the drawings
Fig. 1 is existing crankshaft for gasoline engine；
Fig. 2 is the X-X sectional views of Fig. 1；
Fig. 3 is the structural schematic diagram of the utility model；
Fig. 4 is the Y-Y sectional views of Fig. 3；
Fig. 5 is the Z-Z sectional views of Fig. 4.
In figure：1- originals front end axis, 2- original trunnions, 3- original rod journals, 4- original cranks, 5- original rear axles, 41- original connecting rods
Neck boss；
The front ends 6- axis, 7- trunnions, 8- rod journals, 9- cranks, 10- rear axles, 91- connecting rod neck boss, 92- divide mould
Line.
Specific implementation mode
It elaborates to the utility model below in conjunction with drawings and examples.
Referring to Fig. 3, Fig. 4 and a kind of crankshaft for gasoline engine shown in fig. 5, including front end axis 6, trunnion 7, rod journal
8, crank 9, rear axle 10, it is characterized in that：The position being connected with the rod journal 8 on the crank 9 is equipped with connecting rod neck boss
91, the top profile of the connecting rod neck boss 91 and the top profile of crank 9 are coplanar, profile is V-shaped；And the connecting rod neck is convex
Left end projection A of the platform 91 on 9 side of crank is overlapped with the right end projection B straight line AB formed with the width b of the crank 9.Even
The left end of bar neck boss 91 forms left end projection A on the side of crank 9, right end forms right end projection on the side of crank 9
B.The profile of connecting rod neck boss 91 is V-shaped and left end projection A projects the straight line AB and crank 9 that B is connected to form with right end
Projections of the width b on 9 side of crank overlaps；The area that bent axle dangerouse cross-section can be increased, to which the torsion for increasing bent axle is rigid
Degree；When the torsion stiffness of bent axle is met the requirements, can achieve the purpose that mitigate weight by reducing crank width.
The lower end projection C of the connecting rod neck boss 91 is on the die parting line 92 of the crank 9.After molding, mold along
When perpendicular to 92 direction depanning of die parting line, AC, BC will not interfere with mold depanning, facilitate bent axle depanning from mold.
The utility model be not modified other Surrounding Parts by being optimized to connecting rod neck boss 91
Under the premise of, the utility model uses the sides such as the higher material of material trademark grade or increase crank width relative to traditional
Method can increase the torsion stiffness of bent axle, mitigate the weight and cost of bent axle, while facilitate crank shaft blank depanning.
Claims (2)
1. a kind of crankshaft for gasoline engine, including front end axis（6）, trunnion（7）, rod journal（8）, crank（9）, rear axle
（10）, it is characterized in that：The crank（9）The upper and rod journal（8）Connected position is equipped with connecting rod neck boss（91）, the company
Bar neck boss（91）Top profile and crank（9）Top profile is coplanar, profile is V-shaped；And the connecting rod neck boss
（91）In crank（9）The left end projection A and right end projection B straight line AB formed on side and the crank（9）Width b weight
It closes.
2. crankshaft for gasoline engine according to claim 1, it is characterized in that：The connecting rod neck boss（91）Lower end projection
C is in the crank（9）Die parting line（92）On.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235377.9U CN207935268U (en) | 2018-02-09 | 2018-02-09 | A kind of crankshaft for gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820235377.9U CN207935268U (en) | 2018-02-09 | 2018-02-09 | A kind of crankshaft for gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207935268U true CN207935268U (en) | 2018-10-02 |
Family
ID=63652209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820235377.9U Active CN207935268U (en) | 2018-02-09 | 2018-02-09 | A kind of crankshaft for gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207935268U (en) |
-
2018
- 2018-02-09 CN CN201820235377.9U patent/CN207935268U/en active Active
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| GR01 | Patent grant |