CN109458392A - A kind of crankshaft for diesel engine - Google Patents
A kind of crankshaft for diesel engine Download PDFInfo
- Publication number
- CN109458392A CN109458392A CN201811456542.4A CN201811456542A CN109458392A CN 109458392 A CN109458392 A CN 109458392A CN 201811456542 A CN201811456542 A CN 201811456542A CN 109458392 A CN109458392 A CN 109458392A
- Authority
- CN
- China
- Prior art keywords
- aperture
- seal cover
- oil seal
- crankshaft
- side wall
- 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.)
- Pending
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Classifications
-
- 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
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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
- F16C3/14—Features relating to lubrication
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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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a kind of crankshafts for diesel engine, crankshaft includes being provided with oil duct in crank-pin and crankshaft, crank-pin includes aperture and oil seal cover, aperture can be connected to oil duct, the inner peripheral surface setting of aperture is fluted, central axis of the opening direction of groove towards aperture, oil seal cover is used for seal and opening, oil seal cover includes bottom wall and side wall, elastic deformation can occur for side wall, and side wall includes first end and the second end opposite with first end, first end is connect with bottom wall, at least part of the second end is received in a groove after elastic deformation occurs.Crankshaft according to the present invention, the inner peripheral surface setting of aperture is fluted, elastic deformation can occur for the side wall of oil seal cover, at least part of the second end is received in a groove after elastic deformation occurs, oil seal cover can effectively seal against aperture, and groove can be effectively prevented oil seal cover and fly off during Crankshaft motion.
Description
Technical field
The present invention relates to Diesel Engine Technique Fields, more particularly to a kind of crankshaft for diesel engine.
Background technique
In Diesel Engine Technique Field, crankshaft includes crank-pin, and usual crank-pin is provided with aperture, and aperture can reduce song
Axis revolution inertia force simultaneously improves crankshaft stress distribution.Crankshaft is additionally provided with oil duct, and the lubricating oil for lubrication is accommodated in oil duct.
The aperture of partial crankshaft can be connected to oil duct.To prevent the lubricating oil in oil duct from leaking via aperture, seal and opening is needed.
Crankshaft is Rotor Systems, and during the work time, crankshaft subjects the work of high temperature, high pressure and bending alternating load
With.If during the work time, the poor sealing of oil seal cover can make oil seepage, oil seal cover can be flown off when serious, from
And oil circuit oil-break is caused, it the failures such as in turn results in scuffing of cylinder bore or seizes, engine is caused to be unable to operate normally.
The sealing structure of the tapping of the crank-pin of the known crankshaft that diesel engine is arranged in is mainly the following structure.
The first sealing structure is as depicted in figs. 1 and 2, is provided with screw plug 13 in the aperture 12 of the crank-pin 11 of crankshaft 10.
Screw plug 13 is arranged at the aperture position of aperture 12, to be used for seal and opening 12.12 oil leak of aperture and prevent spiral shell in order to prevent
Stifled 13 fly off, and screw plug 13 and aperture 12 rivet and be provided with solid lock glue at screw plug 13 and the link position of aperture 12.But by
To the limitation of the size of screw plug 13, screw plug 13 is only applicable to the lesser aperture 12 of diameter.
Second of sealing structure is as shown in Figure 3 and Figure 4, and aperture 22 and 23 interference of screw plug of the crank-pin 21 of crankshaft 20 are matched
It closes.But in this configuration, aperture 22 does not position screw plug 23.If aperture 22 and the magnitude of interference of screw plug 23 are smaller,
Screw plug 23 still may be flown off.If aperture 22 and the magnitude of interference of screw plug 23 are larger, crankshaft 20 is be easy to cause to deform, thus
The bearing of crankshaft 20 is caused to be beated overproof.
The third sealing structure is as shown in Figure 5 and Figure 6, is provided with oil seal cover in the aperture 32 of the crank-pin 31 of crankshaft 30
34, to be used for seal and opening 32.Elastic deformation can occur by way of hydraulic expansion for oil seal cover 34, thus with 32 mistake of aperture
It is full of cooperation.Usually it is arranged fluted 35 in the inner peripheral surface of aperture 32, to position to oil seal cover 34 and prevent oil seal cover 34 from flying
It is de-.But it is unable to judge accurately after elastic deformation occurs for oil seal cover 34 and whether is entered in groove 35 using above-mentioned sealing structure.Such as
Fruit oil seal cover 34 does not enter into groove 35, then oil seal cover 34 is easy to fly off in 30 motion process of crankshaft.
Therefore, it is necessary to a kind of crankshafts for diesel engine, at least to be partially solved problems of the prior art.
Summary of the invention
A series of concept of reduced forms is introduced in Summary, this will in the detailed description section into
One step is described in detail.Summary of the invention is not meant to attempt to limit technical solution claimed
Key feature and essential features do not mean that the protection scope for attempting to determine technical solution claimed more.
In order at least be partially solved the above problem, according to the first aspect of the invention, provide a kind of for diesel engine
Crankshaft, the crankshaft includes that oil duct is provided in crank-pin and the crankshaft, and the crank-pin includes:
Aperture, the aperture can be connected to the oil duct, and fluted, the groove is arranged in the inner peripheral surface of the aperture
Opening direction towards the aperture central axis；And
Oil seal cover, for the oil seal cover for sealing the aperture, the oil seal cover includes bottom wall and side wall, the side wall energy
Elastic deformation enough occurs, and the side wall includes first end and the second end opposite with the first end, described the
One end is connect with the bottom wall, and at least part of the second end is accommodated in the groove after elastic deformation occurs
In.
Crankshaft according to the present invention, crankshaft include the oil seal cover of aperture and seal and opening, and the inner peripheral surface of aperture is provided with
Elastic deformation can occur for groove, the side wall of oil seal cover, and at least part of the second end is received after elastic deformation occurs
In a groove, in this way, oil seal cover can effectively seal against aperture, groove can be effectively prevented oil seal cover in Crankshaft motion process
In fly off.
Optionally, the groove includes positioning region and holding section, the first end of the positioning region and the side wall
It offsets, at least part of the second end is accommodated in the holding section after elastic deformation occurs.In this way, can make
Obtaining oil seal cover can be by accurate positioning to the position opposite with groove, and elasticity shape is occurring at least part of the second end
It is accommodated in holding section after change.
Optionally, the positioning region is than the holding section closer to the oil duct.In this way, using compression convenient for operator
Tool makes oil seal cover that elastic deformation occur, consequently facilitating oil seal cover seal and opening.
Optionally, outer diameter of the oil seal cover at the first end of the side wall is greater than or equal to the aperture and exists
Internal diameter at the positioning region.In this way, oil seal cover is positioned by positioning region to corresponding position, thus seal and opening.
Optionally, the side wall is connect with the bottom wall by arc transition wall.The structure of oil seal cover can be improved in this way
Intensity avoids side wall and bottom wall from being deformed at link position and side wall and bottom wall is caused to rupture at link position.
Optionally, the holding section includes inclined-plane and snap-latch surface, the inner peripheral surface of the snap-latch surface from the aperture
The direction for being directed away from the central axis of the aperture extends, and the inclined-plane is connected to the elongated end of the snap-latch surface and from institute
The direction for stating elongated end towards the central axis of the aperture tilts, and the snap-latch surface is for described second with the oil seal cover
The end surfaces of end offset.Thus, it is possible to prevent oil seal cover along the direction for the central axis for being parallel to aperture towards crank-pin
Outside is mobile, and then is effectively prevented oil seal cover and flies off.
Optionally, the angle between the snap-latch surface and the inclined-plane is acute angle.In this way, being convenient for holding section and the second end
It offsets.
Optionally, the groove is arranged around the central axis of the aperture.Installation difficulty is reduced as a result,.
Detailed description of the invention
Following drawings of the invention is incorporated herein as part of the present invention for the purpose of understanding the present invention.Shown in the drawings of this hair
Bright embodiment and its description, device used to explain the present invention and principle.In the accompanying drawings,
Fig. 1 is a kind of known partial schematic diagram of crankshaft, wherein the aperture of screw plug sealing crank-pin；
Fig. 2 is the partial enlarged view of the part A in Fig. 1；
Fig. 3 is the partial schematic diagram of known another crankshaft, wherein the aperture of screw plug and crank-pin is interference fitted；
Fig. 4 is the partial enlarged view of the part B in Fig. 3；
Fig. 5 is the partial schematic diagram of another known crankshaft, wherein the aperture of oil seal cover sealing crank-pin；
Fig. 6 is the partial enlarged view of the C portion in Fig. 5；
Fig. 7 is the partial schematic diagram according to the crankshaft of a preferred embodiment of the present invention, wherein oil seal cover sealing is bent
The aperture of handle pin；
Fig. 8 is the partial schematic diagram of aperture shown in Fig. 7；
Fig. 9 is the cross-sectional view of oil seal cover shown in Fig. 7；
Figure 10 is the assembling schematic diagram of the oil seal cover and aperture shown in Fig. 7 before generation elastic deformation shown in Fig. 9；
Figure 11 is the assembling schematic diagram of the oil seal cover and aperture shown in Fig. 7 after generation elastic deformation shown in Fig. 9.
Description of symbols:
10,20,30: crankshaft 11,21,31: crank-pin
12,22,32: aperture 13,23: screw plug
34: oil seal cover 35: groove
100: crankshaft 110: crank-pin
120: aperture 121: the inner peripheral surface of aperture
130: groove 131: positioning region
132: holding section 133: inclined-plane
134: snap-latch surface 135: joint face
140: oil seal cover 141: bottom wall
142: side wall 143: first end
144: the second end 145: arc transition wall
146: end surfaces
Specific embodiment
In the following description, a large amount of concrete details are given so as to provide a more thorough understanding of the present invention.So
And it is obvious to the skilled person that the present invention may not need one or more of these details and be able to
Implement.In other examples, in order to avoid confusion with the present invention, for some technical characteristics well known in the art not into
Row description.
In order to thoroughly understand the present invention, detailed structure will be proposed in following description, to illustrate the present invention.It is aobvious
So, execution of the invention is not limited to the specific details that the those skilled in the art are familiar with.Preferable reality of the invention
Example is applied to be described in detail as follows, however other than these detailed descriptions, the present invention can also have other embodiments, should not solve
It is interpreted as being confined to embodiments presented herein.
It should be understood that the purpose of term as used herein is only that description specific embodiment and not as the present invention
Limitation, " one " of singular, "one" and " described/should " be also intended to include plural form, unless the context clearly indicates
Other mode.When the term " comprising " and/or " including " is used in this specification, indicate there are the feature, entirety,
Step, operation, element and/or component, but do not preclude the presence or addition of other one or more features, entirety, step, operation,
Element, component and/or their combination.Term " on " used in the present invention, "lower", "front", "rear", "left", "right" with
And similar statement is for illustrative purposes only, not limits.
The cited such as ordinal number of " first " and " second " is only to identify in the present invention, without any other
Meaning, such as specific sequence etc..Moreover, for example, term " first component " itself does not imply that the presence of " second component ", art
Language " second component " does not imply that the presence of " first component " in itself.
Hereinafter, specific embodiments of the present invention are described in more detail with reference to the accompanying drawings, those figures show this
The representative embodiment of invention is not to limit the present invention.
Fig. 7 to Figure 11 schematically shows the partial structurtes of the crank-pin 110 of crankshaft 100 of the invention.
Crankshaft 100 is one of important component of diesel engine, and crankshaft 100 can be connect by connecting rod with piston, 100 energy of crankshaft
The active force that connecting rod transmits enough is born, and is changed into torque output and other attachmentes on engine is driven to work.Gyrating mass
Centrifugal force, the gas inertia power of mechanical periodicity and reciprocal inertia force to the collective effect of crankshaft 100 so that crankshaft 100 bear it is curved
Bent torsional load.
Specifically, crankshaft 100 may include trunnion, crank arm and crank-pin 110.Crank-pin 110 by crank arm with
Trunnion connection, crank-pin 110 is for connecting connecting rod tip, to bear the active force that connecting rod tip transmits.Both due to crankshaft 100
It is influenced by the effect of the space force system changed, and by high-speed slide friction, therefore, is additionally provided with oil duct in crankshaft 100
(not shown) is provided with lubricating oil in oil duct, for lubricating crankshaft 100.
In order to mitigate the weight of crank-pin 110, as shown in Figure 7 and Figure 8, crank-pin 110 includes aperture 120.In order into one
Step expands the lubrication area of lubricating oil, and aperture 120 can be connected to oil duct.Crank-pin 110 may include multiple apertures 120, more
Some or all of aperture 120 in a aperture 120 can be connected to oil duct.For example as shown in fig. 7, crank-pin 110 can be with
Including two apertures 120, two apertures 120 are interconnected and arranged crosswise.The arrangement of above-mentioned aperture 120, both may be used
To mitigate the weight of crank-pin, and the lubrication area of lubricating oil can be expanded.Lubricating oil is splashed to via aperture 120 in order to prevent
The outside of crank-pin 110, crank-pin 110 further include oil seal cover 140, to be used for seal and opening 120.
It is described below for the structure of oil seal cover 140.
As shown in figure 9, oil seal cover 140 includes bottom wall 141 and side wall 142.It is being parallel to the flat of the central axis of bottom wall 141
On face, the cross sectional shape of oil seal cover 140 can be rough U-shaped.The opening of oil seal cover 140 can be towards crank-pin 110
Outside, in order to which operator assembles oil seal cover 140.Bottom wall 141 can be circular flat structure.For the ease of assembly, bottom
The center of wall 141 can also be directed away from the direction protrusion of the opening of oil seal cover 140 relative to edge.
Side wall 142 may include first end 143 and the second end 144 opposite with first end 143, first end
143 can connect with bottom wall 141.Preferably, first end 143 can be connect with bottom wall 141 by arc transition wall 145, this
The structural strength of oil seal cover 140 can be improved in sample, avoids side wall 142 from being deformed at link position with bottom wall 141 and causes
Side wall 142 and bottom wall 141 rupture at link position.After oil seal cover 140 is assembled to aperture 120, first end 143 is opposite
In the second end 144 closer to oil duct, the second end 144 is relative to first end 143 closer to the opening of aperture 120.
Elastic deformation can occur for oil seal cover 140.Optionally, oil seal cover 140 can be made of metal.Oil seal cover 140
Thickness can be 1mm~3mm, in order to which elastic deformation occurs for oil seal cover 140.Preferably, the thickness of oil seal cover 140 can be
2mm, but also oil seal cover 140 has good structural strength and convenient for operation.
As shown in connection with fig. 10, the taper of the side wall 142 of oil seal cover 140 can prevent in order to assemble in oil sealing for 1:20
Lid 140 is stuck with aperture 120 before elastic deformation occurs.In the present invention, taper refers to side wall 142 in the second end
144 outer diameter and the ratio between the height of side wall 142, the height of side wall 142 are referred in the plane upper side wall perpendicular to bottom wall 141
142 height extended.As shown in connection with fig. 7, after oil seal cover 140 is assembled to aperture 120, operator can be by compressing work
For tool so that the elastic deformation of the forms such as hydraulic expansion occurs for oil seal cover 140, the side wall 142 of oil seal cover 140 can be towards remote
The direction for leaving the central axis X in hole 120 is mobile.
Further, bottom wall 141, arc transition wall 145 and side wall 142 may each comprise the inner surface and the outer surface.Work as behaviour
Make personnel by compaction tool make oil seal cover 140 send out elastic deformation after, the inner surface and the outer surface of arc transition wall 145 is equal
Elastic deformation can occur, elastic deformation can occur for the inner surface and the outer surface of side wall 142.In this way, oil sealing can be made
Lid 140 being capable of seal and opening 120 well.
Further, the second end 144 of side wall 142 further includes end surfaces 146, and end surfaces 146 connect side wall 142
The outer surface of inner surface and side wall 142.After oil seal cover 140 is assembled to aperture 120, operator is made by compaction tool
Oil seal cover 140 sends out elastic deformation, and elastic deformation occurs for the inner surface and the outer surface of side wall 142, can make end surfaces 146 to
The direction of central axis X far from aperture 120 is mobile.
Fig. 8 is now returned to, oil seal cover 140 is flown off when crankshaft 100 rotates in order to prevent, and the inner peripheral surface 121 of aperture 120 is set
It is equipped with groove 130, the central axis X of the opening direction of groove 130 towards aperture 120.The second end 144 of oil seal cover 140
At least part is accommodated in groove 130 after elastic deformation occurs.Groove 130 can prevent oil seal cover 140 along flat as a result,
Row is mobile in the outside of the direction of the central axis X of aperture 120 towards crank-pin 110.Due in groove 130 by receiving be oil
The second end 144 of the side wall 142 of capping 140, therefore operator can accurately determine that oil seal cover 140 is matched with groove 130
The position of conjunction can directly pass through the diameter for the oil seal cover 140 that measuring tool (such as slide calliper rule) measures at groove 130, energy
Enough observe directly whether oil seal cover 140 has occurred and that elastic deformation, it is ensured that the second end 144 of the side wall 142 of oil seal cover 140
It is contained in groove 130, enables oil seal cover 140 to effectively seal against aperture 120, and groove 130 can be effectively prevented
Oil seal cover 140 is flown off in 100 motion process of crankshaft.
It is described below for the specific structure of groove 130.
In assembling process, in order to enable oil seal cover 140 can be by accurate positioning to the position opposite with groove 130
Place, as shown in figure 8, groove 130 may include positioning region 131 and holding section 132, in conjunction with shown in Fig. 7 and Figure 10, positioning region 131
It can offset with the first end 143 of side wall 142.
It is described below for positioning region 131.
On the direction parallel with the central axis X of aperture 120, positioning region 131 can be than holding section 132 closer to oil
Road.After oil seal cover 140 is assembled to aperture 120, bottom wall 141 can be than side wall 142 closer to oil duct, and first end 143 can
With than the second end 144 closer to oil duct.In this way, the direction and the opening of aperture 120 of the opening of oil seal cover 140 can be made
Towards roughly the same, compaction tool is used to make oil seal cover 140 that elastic deformation occur convenient for operator, consequently facilitating oil seal cover
140 seal and openings 120.
It offsets for the ease of positioning region 131 and first end 143, oil seal cover 140 is at the first end 143 of side wall 142
Outer diameter D 1 be greater than or equal to internal diameter D2 of the aperture 120 at positioning region 131.In this way, positioning region 131 can prevent oil seal cover
140 move along the direction of the direction parallel with the central axis X of aperture 120 towards oil duct, and oil seal cover 140 is determined by positioning region 131
At position to corresponding position, so that the second end 144 of the side wall 142 of oil seal cover 140 can be accommodated in groove 130
In, enable 140 seal and opening 120 of oil seal cover, and prevent oil seal cover 140 from flying off in 100 motion process of crankshaft.
It is described below for the specific structure of holding section 132.
As shown in figure 8, holding section 132 may include inclined-plane 133 and snap-latch surface 134, snap-latch surface 134 can be from aperture 120
Inner peripheral surface 121 be directed away from aperture 120 central axis X direction extend, inclined-plane 133 is connected to prolonging for snap-latch surface 134
It stretches end and is tilted from elongated end towards the direction of the central axis X of aperture 120, in conjunction with Figure 11 as can be seen that snap-latch surface 134 is used
It offsets in the end surfaces 146 of the second end 144 with oil seal cover 140.
Further, after elastic deformation occurs for the side wall 142 of oil seal cover 140, first end 143 and end surfaces 146 it
Between distance can be roughly equal with the distance between positioning region 131 and snap-latch surface 134.Can make in this way positioning region 131 with
First end 143 offsets, and the second end 144 is positioned at the position opposite with holding section 132, so that the second end
144 at least part is accommodated in holding section 132 after elastic deformation occurs.
For the second end 144 of oil seal cover 140 after elastic deformation occurs, the end surfaces 146 of the second end 144 can be with card
Conjunction face 134 offsets, to prevent oil seal cover 140 along the direction for the central axis X for being parallel to aperture 120 towards crank-pin 110
Outside is mobile, and then is effectively prevented oil seal cover 140 and flies off.
In a preferred embodiment, as shown in figure 11, the end surfaces 146 of the part of the second end 144 can be with
Snap-latch surface 134 offsets, it is possible thereby to reduce assembly difficulty.In another preferred embodiment, the whole of the second end 144
End surfaces 146 can offset with snap-latch surface 134, it is possible thereby to improve the second end 144 end surfaces 146 and holding section 132
Contact area, enhance stability, reduce the risk that flies off of oil seal cover 140.
Further, groove 130 can be arranged around the central axis X of aperture 120.In this way, the second end 144 is occurring
Circumferential direction after elastic deformation along aperture 120 is accommodated in holding section 132, further reduced installation difficulty.
Further, as shown in figure 8, the angle α between snap-latch surface 134 and inclined-plane 133 can be acute angle.In this way, just
It offsets in holding section 132 and the second end 144.In the embodiment that Fig. 8 shows, positioning region 131 can be to be approximately perpendicular to out
The plane of the central axis X in hole 120.Groove 130 can also include joint face 135, and joint face 135 connects inclined-plane 133 and positioning
Portion 131, joint face 135 can be roughly parallel to the central axis X of aperture 120.In a kind of optional embodiment, edge and company
Angle β between the plane that 135 opposite direction of junction extends and inclined-plane 133 can be acute angle, it is preferable that angle β can be 10
~35 degree of degree, that is to say, that the angle of the angle (i.e. the angle complementary with angle β) between joint face 135 and inclined-plane 133 can be
Obtuse angle, it is preferable that obtuse angle can be 145 degree~170 degree, in order to the second end 144 after elastic deformation occurs along aperture 120
Circumferential direction be accommodated in holding section 132.
Preferably, side wall 142 is after occurring elastic deformation, the outer surface of the second end 144 of side wall 142 can also with it is oblique
Face 133 fits closely.In this way, the second end 144 is made to connect stronger with groove 130.Further, such as Figure 11 institute
Show, the side wall 142 of oil seal cover 140 is after occurring elastic deformation, and the side wall 142 between first end 143 and the second end 144 is also
It can be fitted closely with joint face 135.
Oil seal cover 140 can be interference fitted with groove 130 as a result, so that oil seal cover 140 connect more with groove 130
Securely.During the motion, centrifugal force suffered by oil seal cover 140 can evenly spread to groove 130 to crankshaft 100, thus anti-
Only oil seal cover 140 ruptures.Further, lubricating oil can be set between groove 130 and oil seal cover 140, to reduce oil sealing
Friction between lid 140 and groove 130, and the leakproofness of oil seal cover 140 can be enhanced.
Optionally, the side wall 142 of oil seal cover 140 is after occurring elastic deformation, and the diameter of phi of the opening of oil seal cover 140 can be with
For 58mm~62mm, it is preferable that the diameter of phi of the opening of oil seal cover 140 can be 60mm, to guarantee the second end 144 at least
A part is accommodated in groove 130 after elastic deformation occurs, and is effectively prevented oil seal cover 140 in 100 motion process of crankshaft
In fly off.Certainly, for the side wall 142 of oil seal cover 140 after elastic deformation occurs, operator can select various sizes of compression
Tool controls the diameter of phi of the opening of oil seal cover 140, so that oil seal cover 140 can adapt to 120 He of aperture of different-diameter
Various sizes of groove 130, avoid groove 130 and oil seal cover 140 magnitude of interference it is larger crankshaft 100 is caused to deform, thus
Crankshaft 100 is avoided to generate bearing bounce overproof.
Unless otherwise defined, technical and scientific term used herein and those skilled in the art of the invention
Normally understood meaning is identical.Term used herein is intended merely to describe specifically to implement purpose, it is not intended that limitation is originally
Invention.The terms such as herein presented " portion ", " part " can both indicate single part, can also indicate multiple parts
Combination.The terms such as herein presented " installation ", " setting " can both indicate that a component was attached directly to another portion
Part can also indicate that a component is attached to another component by middleware.It describes in one embodiment herein
Feature can be applied in combination another embodiment individually or with other features, unless this feature is in another implementation
It is not suitable for or is otherwise noted in mode.
The present invention has been explained by the above embodiments, but it is to be understood that, above-described embodiment is only intended to
The purpose of citing and explanation, is not intended to limit the invention to the scope of the described embodiments.Furthermore those skilled in the art
It is understood that the present invention is not limited to the above embodiments, introduction according to the present invention can also be made more kinds of member
Variants and modifications, all fall within the scope of the claimed invention for these variants and modifications.Protection scope of the present invention by
The appended claims and its equivalent scope are defined.
Claims (8)
1. a kind of crankshaft for diesel engine, the crankshaft includes being provided with oil duct, feature in crank-pin and the crankshaft
It is, the crank-pin includes:
Aperture, the aperture can be connected to the oil duct, and the inner peripheral surface setting of the aperture is fluted, and the groove is opened
Central axis of the mouth direction towards the aperture；And
Oil seal cover, the oil seal cover is for sealing the aperture, and the oil seal cover includes bottom wall and side wall, and the side wall can be sent out
Raw elastic deformation, and the side wall includes first end and the second end opposite with the first end, the first end
Portion is connect with the bottom wall, and at least part of the second end is accommodated in the groove after elastic deformation occurs.
2. crankshaft according to claim 1, which is characterized in that the groove includes positioning region and holding section, the positioning
Portion and the first end of the side wall offset, and at least part of the second end is received after elastic deformation occurs
In the holding section.
3. crankshaft according to claim 2, which is characterized in that the positioning region is than the holding section closer to the oil
Road.
4. crankshaft according to claim 2, which is characterized in that the oil seal cover is at the first end of the side wall
Outer diameter be greater than or equal to internal diameter of the aperture at the positioning region.
5. crankshaft according to claim 4, which is characterized in that the side wall is connected with the bottom wall by arc transition wall
It connects.
6. crankshaft according to claim 2, which is characterized in that the holding section includes inclined-plane and snap-latch surface, the engaging
The direction of face from the central axis that the inner peripheral surface of the aperture is directed away from the aperture extends, and the inclined-plane is connected to
The elongated end of the snap-latch surface and from the elongated end towards the central axis of the aperture direction tilt, the snap-latch surface
End surfaces for the second end with the oil seal cover offset.
7. crankshaft according to claim 6, which is characterized in that the angle between the snap-latch surface and the inclined-plane is sharp
Angle.
8. crankshaft according to claim 1, which is characterized in that the groove is arranged around the central axis of the aperture.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456542.4A CN109458392A (en) | 2018-11-30 | 2018-11-30 | A kind of crankshaft for diesel engine |
| CN201922188829.XU CN212479889U (en) | 2018-11-30 | 2019-12-02 | Crankshaft for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811456542.4A CN109458392A (en) | 2018-11-30 | 2018-11-30 | A kind of crankshaft for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109458392A true CN109458392A (en) | 2019-03-12 |
Family
ID=65612152
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811456542.4A Pending CN109458392A (en) | 2018-11-30 | 2018-11-30 | A kind of crankshaft for diesel engine |
| CN201922188829.XU Active CN212479889U (en) | 2018-11-30 | 2019-12-02 | Crankshaft for diesel engine |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922188829.XU Active CN212479889U (en) | 2018-11-30 | 2019-12-02 | Crankshaft for diesel engine |
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| Country | Link |
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| CN (2) | CN109458392A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229972Y (en) * | 1994-11-07 | 1996-06-26 | 陶志新 | Lubriating device for petrol engine |
| JP2000220423A (en) * | 1999-02-03 | 2000-08-08 | Honda Motor Co Ltd | Lubricating oil passage structure of crankshaft |
| JP2008002390A (en) * | 2006-06-23 | 2008-01-10 | Toyota Motor Corp | Oil passage structure for internal combustion engine |
| JP2009150323A (en) * | 2007-12-20 | 2009-07-09 | Yamaha Motor Co Ltd | Internal combustion engine and vehicle |
| JP2012067652A (en) * | 2010-09-22 | 2012-04-05 | Kubota Corp | Sealing device of rotary part of engine |
-
2018
- 2018-11-30 CN CN201811456542.4A patent/CN109458392A/en active Pending
-
2019
- 2019-12-02 CN CN201922188829.XU patent/CN212479889U/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2229972Y (en) * | 1994-11-07 | 1996-06-26 | 陶志新 | Lubriating device for petrol engine |
| JP2000220423A (en) * | 1999-02-03 | 2000-08-08 | Honda Motor Co Ltd | Lubricating oil passage structure of crankshaft |
| JP2008002390A (en) * | 2006-06-23 | 2008-01-10 | Toyota Motor Corp | Oil passage structure for internal combustion engine |
| JP2009150323A (en) * | 2007-12-20 | 2009-07-09 | Yamaha Motor Co Ltd | Internal combustion engine and vehicle |
| JP2012067652A (en) * | 2010-09-22 | 2012-04-05 | Kubota Corp | Sealing device of rotary part of engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN212479889U (en) | 2021-02-05 |
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Application publication date: 20190312 |