CN106763467B - Internal combustion engine and piston pin - Google Patents
Internal combustion engine and piston pin Download PDFInfo
- Publication number
- CN106763467B CN106763467B CN201610854204.0A CN201610854204A CN106763467B CN 106763467 B CN106763467 B CN 106763467B CN 201610854204 A CN201610854204 A CN 201610854204A CN 106763467 B CN106763467 B CN 106763467B
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- China
- Prior art keywords
- elastic portion
- mgmt dept
- quality mgmt
- vibration absorber
- dynamic vibration
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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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Vibration Prevention Devices (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
In the case where the dynamic vibration absorber of flexible resonance for inhibiting connecting rod is arranged, the lightweight of the internal combustion engine and piston pin of the setting object as dynamic vibration absorber is realized.Piston pin (12) has pin main body (12a), elastic portion (12b) and Quality Mgmt Dept (12c).Elastic portion (12b) is equivalent to the elastomer for the dynamic vibration absorber for inhibiting the flexible resonance of connecting rod.Quality Mgmt Dept (12c) is equivalent to the mass body of the dynamic vibration absorber.Elastic portion (12b) and Quality Mgmt Dept (12c) are formed in the end of pin main body (12a).That is, assigning the function of dynamic vibration absorber to the end of pin main body (12a).It changes an angle to see, it is also assumed that with pin main body (12a) fixed dynamic vibration absorber.Therefore, the only component for the purpose of the fixation of dynamic vibration absorber can be omitted, can be realized the lightweight of the internal combustion engine and piston pin of the setting object as dynamic vibration absorber.
Description
Technical field
The present invention relates to internal combustion engines and piston pin, specifically, are related to the internal combustion engine for having dynamic vibration absorber and piston pin,
The dynamic vibration absorber is used for the noise for inhibiting to generate with burning.
Background technique
In the past, known to occur when the intrinsic frequency of the vibrating body vibrated by external force is consistent with the frequency of the external force greatly
The oscillation phenomenon (resonance) of amplitude, and generate noise.In internal combustion engine, when the frequency of exciting force and piston, connecting rod, crankshaft etc. this
It when the intrinsic frequency for the vibrating body of sample vibrated due to the exciting force along with burning is consistent, then resonates, and generates and make an uproar
Sound (combustion noise).
In non-patent literature 1, disclose the following contents: combustion noise has tri- peaks 1.7kHz, 3.3kHz and 6kHz,
Respective producing cause is secondary buckling resonance, the flexible resonance of connecting rod and the burning that crankshaft and cylinder body are integrally formed
The sympathetic response of room.In addition, in non-patent literature 1, disclosing these frequencies and being determined by the essential structure of internal combustion engine.
In patent document 1 to 3, following technology is disclosed: being conceived to referring in non-patent literature 1, connecting rod flexible
The case where resonance is integrally generated by the small end of piston, piston pin and connecting rod, in order to inhibit the flexible resonance, in internal combustion engine
Dynamic vibration absorber is set.In patent document 1 and 2, specifically, in the inside of connection piston and the piston pin of the tubulose of connecting rod
Dynamic vibration absorber is set.The dynamic vibration absorber has the fixed part for the inner peripheral surface for being fixed on piston pin, the portion's of being fixed bearing and phase
When in elastomer supporting part and the movable part of mass body is connect and is equivalent to fixed part via supporting part.On the other hand,
In patent document 3, dynamic vibration absorber is set in the inner face of piston (that is, face of the side opposite with the top surface of piston).This is dynamic
Power bump leveller has the fixed part for the inner face for being fixed on piston and the portion of being fixed supports and be equivalent to mass body and elastomer
Beam portion.
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2015-083826 bulletin
Patent document 2: International Publication No. 2014/034034
Patent document 3: Japanese Unexamined Patent Publication 2014-095297 bulletin
Non-patent literature
Non-patent literature 1: big tomb is refined also " utilizing the reduction method of the diesel combustion noise of engine construction ", automotive engineering
Meeting disquisition, which preceding can be brushed, to be collected, and 2005
Summary of the invention
Subject to be solved by the invention
In the dynamic vibration absorber of patent document 1 and 2, the value of the spring constant k of supporting part relative to the quality m of movable part
Square root (=(k/m)1/2) it is adjusted to specified value, to realize the inhibition of the flexible resonance of connecting rod.In addition, in patent text
It offers in 3 dynamic vibration absorber, square root (=(k/m) of the spring constant k of beam portion relative to the value of the quality m of beam portion1/2) adjusted
Section is specified value, to realize the inhibition of the flexible resonance of connecting rod.That is, passing through in the dynamic vibration absorber of patent document 1 to 3
The spring constant k of elastomer is adjusted to specified value relative to the square root of the value of the quality m of mass body, to realize connecting rod
The inhibition of flexible resonance.In other words, the fixed part of patent document 1 to 3 using the power for having mass body and elastomer for being inhaled
Vibration device and the inhibition of the flexible resonance of repressed connecting rod do not contribute, be intended merely to inner peripheral surface and piston in piston pin
Back side installation quality body and elastomer and exist.
The lightweight of internal combustion engine can be such that fuel efficiency improves, therefore, it is intended that excluding to may cause the weight of internal combustion engine as far as possible
Increased element.Based on this point, in patent document 1 to 3, it is contemplated that fixed part is equivalent to such element, so needing
Seek further to improve.
The present invention is made in view of project as described above.That is, the flexible resonance for inhibiting connecting rod is arranged
In the case where dynamic vibration absorber, the internal combustion engine of setting object and the light weight of piston pin to realize as dynamic vibration absorber turn to mesh
's.
Means for solving the problems
Internal combustion engine of the invention has the piston pin of connection piston and connecting rod.The piston pin have tubulose pin main body,
And the dynamic vibration absorber for inhibiting the flexible resonance of the connecting rod along with burning.In the fixed institute of the tube end of the pin main body
State dynamic vibration absorber.
In internal combustion engine of the invention, the dynamic vibration absorber can also have the elastic portion of tubulose, the elastic portion phase
When in elastomer, there is the outer diameter smaller than the outer diameter of the tube end.In this case, the outer peripheral surface of the elastic portion can also be with
Opposite with the inner peripheral surface of pin hole, the pin hole is formed in key seat, for the pin main body be inserted into, the inner peripheral surface with the periphery
The opposite face in face can also be formed with cricoid groove portion along the outer peripheral surface.In addition, in this case, it can also in the groove portion
To be embedded in split ring, the split ring has described in bigger than the outer diameter of the elastic portion in the state of being embedded in the groove portion and ratio
The small internal diameter of the outer diameter of tube end.
In internal combustion engine of the invention, the dynamic vibration absorber can also have the Quality Mgmt Dept of tubulose and the elasticity of tubulose
Portion, the Quality Mgmt Dept are equivalent to mass body, and the elastic portion is equivalent to elastomer, and the Quality Mgmt Dept and the tube end are connected
It connects, and there is the outer diameter smaller than the outer diameter of the tube end.In this case, the outer peripheral surface of the elastic portion can also be with pin
The inner peripheral surface in hole is opposite, and the pin hole is formed in key seat, is inserted into for the pin main body, it is opposite with the outer peripheral surface it is described in
On circumferential surface, the cricoid groove portion for split ring to be arranged, the split ring can also be formed with along the outer diameter of the elastic portion
With big and smaller than the outer diameter of the tube end internal diameter of the outer diameter than the elastic portion.In addition, in this case, the quality
Portion can also have notch section, and the notch section extends to the face of its opposite side from the end face of the elastic portion side, makes the bullet
Property portion the Quality Mgmt Dept side end face expose.
In internal combustion engine of the invention, the dynamic vibration absorber can also have Quality Mgmt Dept and elastic portion, the Quality Mgmt Dept
It is equivalent to mass body, the elastic portion is equivalent to elastomer, and the Quality Mgmt Dept is connect with the tube end.In the situation
Under, the Quality Mgmt Dept is also possible to the other component relative to the pin main body.In addition, the elastic portion is also possible to relatively
In the other component of the pin main body.In this case, it also could be formed in the tube end for by the elastic portion
The groove portion of insertion.
In internal combustion engine of the invention, the dynamic vibration absorber is also possible to the integral type knot with the tube end one
Structure.
In internal combustion engine of the invention, in the pin hole that tube end insertion is formed in key seat, the dynamic vibration absorber
Have Quality Mgmt Dept, in the case that the end face in the outside positioned at the pin hole of the Quality Mgmt Dept is opposite with the inner wall of cylinder, with
The radius of curvature of the end face of the opposite Quality Mgmt Dept of the inner wall can also be equal with the radius of curvature of the inner wall.
In internal combustion engine of the invention, the dynamic vibration absorber is also configured to not only with the flexible resonance generation
Frequency vibration is also vibrated with the different frequency of the frequency generated from the flexible resonance.
Piston pin of the invention links the piston of internal combustion engine and connecting rod, and the piston pin has: the pin master of tubulose
Body；And dynamic vibration absorber, the dynamic vibration absorber are used to inhibit the flexible resonance of the connecting rod along with burning, the power is inhaled
Vibration device is fixed on the tube end of the pin main body.
In piston pin of the invention, have the Quality Mgmt Dept of tubulose and the elastic portion of tubulose, institute in the dynamic vibration absorber
It states Quality Mgmt Dept and is equivalent to mass body, the elastic portion is equivalent to elastomer, and the Quality Mgmt Dept is connect with the tube end, and has
In the case where having the outer diameter smaller than the outer diameter of the tube end, the Quality Mgmt Dept can also have a notch section, the notch section from
The end face of the elastic portion side extends to the face of the end face opposite side, reveals the end face of the Quality Mgmt Dept side of the elastic portion
Out.
In piston pin of the invention, have Quality Mgmt Dept and elastic portion in the dynamic vibration absorber, the Quality Mgmt Dept is suitable
In mass body, the elastic portion is equivalent to elastomer, and in the case that the Quality Mgmt Dept is connect with the tube end, the matter
Amount portion is also possible to the other component relative to the pin main body.In addition, being relative to the pin main body in the elastic portion
Other component in the case where, also could be formed with the groove portion for the elastic portion to be embedded in the tube end.
In piston pin of the invention, the dynamic vibration absorber is also possible to the integral type knot with the tube end one
Structure.
In piston pin of the invention, the dynamic vibration absorber is also configured to not only with the flexible resonance generation
Frequency vibration is also vibrated with the different frequency of the frequency generated from the flexible resonance.
The effect of invention
According to the present invention, it is fixed with the dynamic vibration absorber for inhibiting the flexible resonance of connecting rod in the tube end of pin main body,
The component only for the purpose of the fixation of the dynamic vibration absorber is omitted.Therefore, it can be realized the setting pair as dynamic vibration absorber
The lightweight of the internal combustion engine and piston pin of elephant.
Detailed description of the invention
Fig. 1 is the skeleton diagram of the internal combustion engine of embodiments of the present invention 1.
Fig. 2 is schematic cross-sectional view when cutting off internal combustion engine shown in FIG. 1 at line A-A.
Fig. 3 is the schematic cross-sectional view of the end perimeter of piston pin when cutting off internal combustion engine shown in FIG. 1 at line B-B.
Fig. 4 is the figure for the variation for illustrating the internal combustion engine of embodiments of the present invention 1.
Fig. 5 is the schematic cross-sectional view of the end perimeter of the piston pin in the internal combustion engine of embodiments of the present invention 2.
Fig. 6 is the figure for the variation for illustrating the internal combustion engine of embodiments of the present invention 2.
Fig. 7 is the figure for the variation for illustrating the internal combustion engine of embodiments of the present invention 2.
Fig. 8 is the figure for the variation for illustrating the internal combustion engine of embodiments of the present invention 2.
Fig. 9 is the schematic cross-sectional view of the end perimeter of the piston pin in the internal combustion engine of embodiments of the present invention 3.
Figure 10 is the enlarged diagram around the elastic portion 20 of Fig. 9.
Figure 11 is the schematic cross-sectional view of the end perimeter of the piston pin in the internal combustion engine of embodiments of the present invention 4.
Figure 12 is the figure for the variation for illustrating the internal combustion engine of embodiments of the present invention 4.
Figure 13 is the schematic diagram of the end perimeter of the piston pin in the internal combustion engine of embodiments of the present invention 5.
Figure 14 is the figure for illustrating the installation method of split ring 10c.
Specific embodiment
Hereinafter, illustrating embodiments of the present invention referring to attached drawing.In addition, the present invention is not limited by the following embodiments and the accompanying drawings
It is fixed.
Embodiment 1.
Firstly, illustrating embodiments of the present invention 1 referring to figs. 1 to Fig. 3.
Fig. 1 is the skeleton diagram of the internal combustion engine of embodiments of the present invention 1.Fig. 2 is by internal combustion engine shown in FIG. 1 in line A-A
Schematic cross-sectional view when place's cutting.Fig. 3 is the end perimeter of piston pin when cutting off internal combustion engine shown in FIG. 1 at line B-B
Schematic cross-sectional view.In addition, the type for the internal combustion engine that the present invention can be applicable in does not limit.For example, the present invention can be applicable in
In internal combustion engines such as petrol engine, diesel engine, naturally aspirated engine, engines with supercharger.
As shown in Figure 1, the internal combustion engine of present embodiment has piston 10, piston pin 12 and connecting rod 14.In the side of piston 10
There are two key seat 10a for face formation.Cricoid pin hole 10b is formed on each key seat 10a.Pin is inserted at the both ends of piston pin 12
Hole 10b.In addition, being formed with cricoid groove portion 10d along the inner peripheral surface on the inner peripheral surface of pin hole 10b (referring to Fig. 3).It opens
Choma 10c is the C-shaped retaining ring being embedded in groove portion 10d.Shifting using split ring 10c, on the central axis direction of piston pin 12
It is dynamic to be limited.Split ring 10c and its details of limitation of movement of piston pin 12 is described later.
Piston 10 links via piston pin 12 and the small end 14a of the one end as connecting rod 14.As the another of connecting rod 14
The big end 14b and crankshaft of one end connection (not shown).Small end 14a and big end 14b is connected by columnar column portion 14c
Knot.The cricoid through hole 14d being inserted into for piston pin 12 is formed in small end 14a.On the other hand, it is formed in big end 14b
There is the cricoid through hole 14e for crankshaft insertion.
Piston pin 12 shown in FIG. 1 is rotatably inserted through hole 14d.In addition, as shown in Fig. 2, in through hole 14d
Circumferential surface is fixed with cricoid bushing 16, is to be rotatably inserted piston pin 12 in the bushing 16 strictly speaking.In piston pin
Between 12 and bushing 16, lubricating oil film is formed by supplying the lubricating oil (not shown) recycled in internal combustion engine.Utilize the profit
Lubricating oil film and bushing 16, piston pin 12 are swimmingly rotated relative to bushing 16.In addition, the lubricating oil is also to pin hole 10b and piston
It is supplied between pin 12 and forms lubricating oil film.
In addition, as shown in Figure 2 to Figure 3, piston pin 12 has pin main body 12a, elastic portion 12b and Quality Mgmt Dept 12c.Sell main body
12a, elastic portion 12b and Quality Mgmt Dept 12c are that circular pipe is formed, and is formed as one jointly with through hole 12d by section
Formula structure.Due to being inserted into piston pin 12 in 16 both sides of pin hole 10b and bushing, so pin main body 12a, elastic portion 12b and quality
The outer diameter of portion 12c is smaller than the internal diameter of pin hole 10b and bushing 16.But in order to improve the flexibility of elastic portion 12b, elastic portion 12b's
Outer diameter is done small, and at least the outer diameter than pin main body 12a is small.On the other hand, as long as the outer diameter of Quality Mgmt Dept 12c can be avoided matter
The size of the inner circumferential face contact of the outer peripheral surface and pin hole 10b of amount portion 12c, can be equal with the outer diameter of pin main body 12a, can also
It, can also be smaller than the outer diameter of elastic portion 12b with equal with the outer diameter of elastic portion 12b.
As shown in figure 3, elastic portion 12b is contained in pin hole 10b, the outer peripheral surface of elastic portion 12b is opposite with split ring 10c.
Although also having accommodated a part of Quality Mgmt Dept 12c in pin hole 10b, remaining of Quality Mgmt Dept 12c is predominantly located in pin hole 10b
Outside.Elastic portion 12b and Quality Mgmt Dept 12c is formed in the end of pin main body 12a.For example, by one with through hole 12d
The end of a piston pin carries out grinding, so as to which elastic portion 12b and Quality Mgmt Dept 12c to be formed in the end of pin main body 12a
Portion.As long as there is no particular limitation for section shape in addition, elastic portion 12b and Quality Mgmt Dept 12c are tubuloses, elastic portion 12b and
The section of Quality Mgmt Dept 12c is also possible to polygon.In addition, the entirety of Quality Mgmt Dept 12c both can jointly be accommodated with elastic portion 12b
In pin hole 10b, the outside of pin hole 10b can also be located at.
Elastic portion 12b is equivalent to the elastomer of dynamic vibration absorber, the elastomer of the dynamic vibration absorber for inhibit piston 10,
Piston pin 12 and small end 14a are integrally formed and the flexible resonance of connecting rod that generates.On the other hand, Quality Mgmt Dept 12c is equivalent to this
The mass body of dynamic vibration absorber.In addition, including matter in the case where the outer diameter of Quality Mgmt Dept 12c is equal with the outer diameter of elastic portion 12b
The entirety of amount portion 12c and elastic portion 12b be equivalent to the dynamic vibration absorber for inhibiting the flexible resonance of connecting rod elastomer and
Mass body.
Here, illustrate the flexible resonance of connecting rod.The frequency that the flexible resonance of connecting rod generates by piston and connecting rod spring matter
Model is measured to determine.In the spring-mass model, the small end of piston, piston pin and connecting rod is integrally equivalent to particle and (sets quality
For M (units/kg)), the column portion of the small end for linking connecting rod and big end, which is equivalent to, props up the particle relative to the big end
The elastomer (setting spring constant as K (unit N/m)) held.When the small end for setting piston, piston pin and connecting rod is integrated, connecting rod
Flexible resonance at (1/2 π) (K/M)1/2Occur under the intrinsic frequency of Hz.In addition, the details of the spring-mass model exists
It is disclosed in patent document 1 to 3.
In the combustion stroke of internal combustion engine, piston 10 is burned pressure and pushes down.At this point, between piston pin 12 and bushing 16
Lubricating oil film between lubricating oil film and piston pin 12 and pin hole 10b is partially very thin.In this way, piston pin 12 and bushing 16
It is directly contacted with pin hole 10b both sides, piston 10, piston pin 12 and small end 14a are integrally formed, above-mentioned spring-mass model
Precondition satisfaction.Therefore, by obtaining the whole mass M of piston 10, piston pin 12 and small end 14a, the bullet of column portion 14c
Spring constant K, and substitute into the formula of above-mentioned spring-mass model, so that it is determined that the frequency that the flexible resonance of connecting rod generates.
Dynamic vibration absorber is as follows to the inhibition principle of the flexible resonance of connecting rod.That is, by piston 10, piston pin 12 and small end
The vibration for the mass body that 14a is integrally formed is transferred to dynamic vibration absorber and makes its vibration, so as to inhibit the mass body solid
There is the vibration under frequency.Therefore, it can reduce the sound pressure level under intrinsic frequency.That is, being able to suppress the flexible resonance of connecting rod.
Based on the above principles, in the present embodiment, the spring constant k (unit N/m) of elastic portion 12b is relative to Quality Mgmt Dept
The square root (k/m) of the value of the quality m (units/kg) of 12c1/2It is adjusted to and value (K/M)1/2Roughly equal value.Here, such as
Fruit changes the size of elastic portion 12b, then the spring constant variation of elastic portion 12b, and therefore, the size of fixed mass portion 12c is (i.e. solid
Determine the quality m) of Quality Mgmt Dept 12c and change the size of elastic portion 12b, it will be able to regulated value (k/m)1/2.But in this embodiment party
In formula, elastic portion 12b and Quality Mgmt Dept 12c are formed in the end of pin main body 12a.Therefore, from value (k/m)1/2Adjusting simplification
From the perspective of, the size of preferably fixed elastic portion 12b (fixes the spring constant k) of elastic portion 12b and changes Quality Mgmt Dept 12c
Size.It is of course also possible to which the size for changing simultaneously elastic portion 12b and Quality Mgmt Dept 12c comes regulated value (k/m)1/2。
Fig. 2 to Fig. 3 is returned to, illustrates the effect of present embodiment.As described above, elastic portion 12b and Quality Mgmt Dept 12c are formed in
Sell the end of main body 12a.That is, in the present embodiment, the function of dynamic vibration absorber is assigned to the end of pin main body 12a.It changes a
Angle is seen, it is also assumed that being to fix dynamic vibration absorber with pin main body 12a.Therefore, according to the present embodiment, patent can be omitted
The necessary only component for the purpose of the fixation of dynamic vibration absorber, can be realized setting as dynamic vibration absorber in document 1 to 3
Set the lightweight of the internal combustion engine and piston pin of object.
In addition, as described above, the outer diameter of elastic portion 12b is smaller than the outer diameter of pin main body 12a.In addition, in the present embodiment,
As shown in Figure 2 to Figure 3, split ring 10c and the outer peripheral surface of elastic portion 12b are relatively configured.That is, outer diameter it is small, be formed in bullet
The space configuration split ring 10c in the outside of property portion 12b.Therefore, according to the present embodiment, it can efficiently use and be formed in elastic portion
The space in the outside of the outer peripheral surface of 12b.Further, since split ring 10c limits piston in the state of being embedded in above-mentioned groove portion 10d
The movement of pin 12, therefore, the internal diameter of split ring 10c are adjusted in the state that split ring 10c is embedded in groove portion 10d than pin main body
The outer diameter of 12a is small.In addition, the outer diameter of split ring 10c is adjusted in the state that split ring 10c is embedded in groove portion 10d than pin master
The outer diameter of body 12a is big.
In addition, in the present embodiment, as shown in Figure 2 to Figure 3, the separate small end 14a on the inner peripheral surface of pin hole 10b
Position, close to the position of side of piston 10 be formed with groove portion 10d.If groove portion 10d is formed close to small end 14a
Position, then the area stenosis of the outer peripheral surface of the pin main body 12a opposite with the inner peripheral surface is narrow, branch of the key seat 10a to pin main body 12a
It holds and is easy to become unstable.Based on this point, according to the present embodiment, it is ensured that the pin master opposite with the inner peripheral surface of pin hole 10b
The area of the outer peripheral surface of body 12a can make key seat 10a reliable to the bearing of piston pin 12.
In addition, in the present embodiment, split ring 10c and the outer peripheral surface of elastic portion 12b are relatively configured.But only
It wants to prevent piston pin 12 from falling off from piston 10, then there is no particular limitation for the allocation position of split ring 10c.For example, can also
To be equivalent to the groove portion of groove portion 10d along the setting of the opening portion of key seat 10a, and split ring 10c is configured in the groove portion.In the situation
Under, Quality Mgmt Dept 12c is integrally located at the outside of pin hole 10b.In addition, this variation is similarly suitable in aftermentioned embodiment 2 to 4
With.
In addition, in the present embodiment, the end face EF of the Quality Mgmt Dept 12c opposite with the inner wall of cylinder 301It is plane.But
It is, as shown in figure 4, the end face EF of the Quality Mgmt Dept 12c opposite with the inner wall of cylinder 30 can also be made1Radius of curvature it is interior with this
The radius of curvature of wall surface is equal.By making end face EF1Radius of curvature it is equal with the radius of curvature of the inner wall, so as to
It maximizes the size of Quality Mgmt Dept 12c in permissible range, makes value (k/m)1/2Adjusting facilitate.In addition, can avoid well
End face EF1With the inner wall face contact of cylinder 30, the inhibition of flexible resonance of the dynamic vibration absorber to connecting rod can be made reliable.In addition,
This variation also can be equally applicable for the Quality Mgmt Dept (Quality Mgmt Dept 18, Quality Mgmt Dept 182) of aftermentioned embodiment 2 to 4.
Embodiment 2.
Next, illustrating embodiments of the present invention 2 referring to Fig. 5 to Fig. 8.
Fig. 5 is the schematic cross-sectional view of the end perimeter of the piston pin of the internal combustion engine of embodiments of the present invention 2.Such as Fig. 5 institute
Show, piston pin 12 has pin main body 12a, elastic portion 12b and Quality Mgmt Dept 12c.Sell main body 12a, elastic portion 12b and Quality Mgmt Dept 12c
The common size relation with through hole 12d this point and the outer diameter for selling main body 12a, elastic portion 12b and Quality Mgmt Dept 12c with
Embodiment 1 is identical.In addition, the outer peripheral surface of split ring 10c and elastic portion 12b be relatively configured this point also with embodiment 1
It is identical.
Unlike embodiment 1, in the present embodiment, the capacity of Quality Mgmt Dept 12c is done small.In addition, quality
Portion 18 is arranged in a manner of covering Quality Mgmt Dept 12c.Quality Mgmt Dept 18 is the component different from Quality Mgmt Dept 12c (i.e. piston pin 12)
(component in addition).Quality Mgmt Dept 18 is that circular pipe forms (there is no particular limitation for the section shape of Quality Mgmt Dept 18) by section,
And there is through hole 18a, through hole 18a is connected to through hole 12d, for making inside and outside circulation of the lubricating oil to piston pin 12.
But the internal diameter of through hole 18a is smaller than the internal diameter of through hole 12d.In addition, end of the outer diameter of Quality Mgmt Dept 18 in the side Quality Mgmt Dept 12c
Portion expands.In addition, being formed with the shape pair with Quality Mgmt Dept 12c in the end face of the Quality Mgmt Dept 18 opposite with the end face of Quality Mgmt Dept 12c
The groove portion 18b for the shape answered, by the way that Quality Mgmt Dept 12c is pressed into groove portion 18b, thus Quality Mgmt Dept 12c (i.e. piston pin 12) and matter
Amount portion 18 links.
Illustrate the effect of present embodiment below.In the present embodiment, using have elastic portion 12b, Quality Mgmt Dept 12c,
18 dynamic vibration absorber inhibits the flexible resonance of connecting rod, and the component only for the purpose of the fixation of the dynamic vibration absorber is omitted.Cause
This, can be realized the lightweight of the internal combustion engine and piston pin as fixed object.In addition, in the present embodiment, elastic portion 12b
It is equivalent to the elastomer for the dynamic vibration absorber for inhibiting the flexible resonance of connecting rod, Quality Mgmt Dept 12c, 18 are equivalent to the dynamic absorber
The mass body of device.In addition, according to the present embodiment, in the same manner as embodiment 1, can efficiently use and be formed in elastic portion 12b
Outer peripheral surface outside space, key seat 10a can be made reliable to the bearing of piston pin 12.
But, in the embodiment 1, since elastic portion 12b and Quality Mgmt Dept 12c to be formed in the end of pin main body 12a, institute
To have the advantages that simplifying the structure for dynamic vibration absorber can be made, but then, existence value (k/m)1/2Adjusting be easy it is multiple
The difficult point of hydridization.Based on this point, according to the present embodiment, since Quality Mgmt Dept 18 is other component, so can be improved matter
The design freedom in amount portion 18 can make value (k/m)1/2Adjusting be easy (quality m=m12c+m18.Here, m12cIt is Quality Mgmt Dept
The quality of 12c, m18It is the quality of Quality Mgmt Dept 18.).For example, by forming Quality Mgmt Dept 18 with high specific gravity materials such as tungsten or copper, thus
The size of Quality Mgmt Dept 18 can either be made small and being capable of regulated value (k/m)1/2.In addition, can be according to the inner face and key seat of piston 10
The shape of Quality Mgmt Dept 18 is correspondingly changed in the space in the outside of 10a, comes regulated value (k/m)1/2。
In addition, in the present embodiment, by obtain piston 10, piston pin 12, Quality Mgmt Dept 18 and small end 14a entirety
Mass M and column portion 14c spring constant K and substitute into the formula of above-mentioned spring-mass model, so that it is determined that connecting rod is flexible
Resonate the frequency generated.
In addition, as described above, Quality Mgmt Dept 18 has the through hole 18a being connected to through hole 12d.Assuming that piston pin 12
By in the closed situation of Quality Mgmt Dept 18, the situation that lubricating oil flows into through hole 12d is seldom at both ends.But once due to certain
Kind reason lubricating oil enters in through hole 12d, then external discharge of the lubricating oil without normal direction piston pin 12, to as dynamic vibration absorber
Function impact, in some instances it may even be possible to influence the movement of piston 10.Based on this point, according to the present embodiment, due to being formed with
Through hole 18a, so allowing to flow into via the lubricating oil of through hole 18a to through hole 12d, and can be to the outer of piston pin 12
Portion's discharge, therefore can prevent drawbacks described above results from possible trouble.
Fig. 6 to Fig. 8 is the figure for the variation for illustrating the internal combustion engine of embodiments of the present invention 2.These variations are all
It is to be related to the variation of the connection of piston pin 12 and Quality Mgmt Dept 18.In the example shown in Fig. 6, with the end phase of Quality Mgmt Dept 12c
Pair Quality Mgmt Dept 18 end become shape corresponding with the shape of through hole 12d, by by the end be pressed into through hole 12d,
To which Quality Mgmt Dept 12c (i.e. piston pin 12) is connect with Quality Mgmt Dept 18.In this example, the same as that of the second embodiment, Quality Mgmt Dept 12c
It is equivalent to the mass body for the dynamic vibration absorber for inhibiting the flexible resonance of connecting rod with Quality Mgmt Dept 18, elastic portion 12b is equivalent to this
The elastomer of dynamic vibration absorber.In addition, in this example, the same as that of the second embodiment, Quality Mgmt Dept 18 has to be connected with through hole 12d
Logical through hole 18a.Therefore, example according to figure 6 can also omit the only portion for the purpose of the fixation of dynamic vibration absorber
Part lubricating oil can be discharged to the external of piston pin 12 via through hole 18a.
In Fig. 7 into example shown in Fig. 8, elastic portion 12b is fixed by Quality Mgmt Dept 18.In the example shown in Fig. 7, elastic
The radial thickness of portion 12b is made thin.In addition, being formed on the end face of the Quality Mgmt Dept 18 opposite with the end face of elastic portion 12b
The groove portion 18c of shape corresponding with the shape of elastic portion 12b, by the way that elastic portion 12b is pressed into groove portion 18c, thus elastic
Portion 12b (i.e. piston pin 12) and Quality Mgmt Dept 18 link.In this example, the part of the indentation groove portion 18c of elastic portion 12b and Quality Mgmt Dept
18 are equivalent to the mass body for the dynamic vibration absorber for inhibiting the flexible resonance of connecting rod.In addition, the exposed division split-phase of elastic portion 12b
When in the elastomer of the dynamic vibration absorber.In addition, the exposed portion have the internal diameter through hole 12e bigger than through hole 12d and
It is connected to the through hole 12f of through hole 12e Yu pin hole 10b.Therefore, in this example, through hole 12d is via through hole 12e, 12f
External with piston pin 12 is connected to.Therefore, example according to figure 7 can also be omitted and is only fixed as with dynamic vibration absorber
The component of purpose lubricating oil can be discharged to the external of piston pin 12 via through hole 12e, 12f.
In the example shown in Fig. 8, the radial thickness of elastic portion 12b elastic portion 12b thinning with two stages, thinner
(below for ease of description, referred to as " elastic portion 121b ".) perforation Quality Mgmt Dept 18.In addition, elastic portion 121b from Quality Mgmt Dept 18
End face protrusion outstanding processed through overstocked chisel.Elastic portion 12b (i.e. piston pin 12) and Quality Mgmt Dept 18 link as a result,.?
In this example, elastic portion 121b and Quality Mgmt Dept 18 are equivalent to the mass body for the dynamic vibration absorber for inhibiting the flexible resonance of connecting rod.
Elastic portion 12b in addition to elastic portion 121b part (hereinafter, for ease of description, referred to as " elastic portion 122b ".) it is equivalent to this
The elastomer of dynamic vibration absorber.In addition, elastic portion 122b has through hole 12e and through hole 12f.Therefore, in this example, with figure
Similarly, through hole 12d is connected to via through hole 12e, 12f with the external of piston pin 12 example shown in 7.Therefore, according to Fig. 8
Shown in example, can also omit the only component for the purpose of the fixation of dynamic vibration absorber, can via through hole 12e, 12f will
External discharge of the lubricating oil to piston pin 12.
Embodiment 3.
Next, illustrating embodiments of the present invention 3 referring to Fig. 9 to Figure 10.
Fig. 9 is the schematic cross-sectional view of the end perimeter of the piston pin in the internal combustion engine of embodiments of the present invention 3.Such as Fig. 9
Shown, piston pin 12 has pin main body 12a.Selling main body 12a has through hole 12d this point identical as embodiment 1.In addition,
It is also identical as embodiment 1 configured with split ring 10c this point in the inner peripheral surface of pin hole 10b.
Unlike embodiment 1, in the present embodiment, Quality Mgmt Dept 18 and elastic portion with pin main body 12a connection
20 be integrated integral structure, is the component different from pin main body 12a (component in addition).Quality Mgmt Dept 18 is circle by section
Pipe formed (there is no particular limitation for the section shape of Quality Mgmt Dept 18), have through hole 18a.Elastic portion 20 is circle by section
Pipe form (there is no particular limitation for the section shape of elastic portion 20), there is the through hole 20a that is connected to through hole 12d.?
The groove portion 12g of shape corresponding with the shape of the elastic portion 20 is formed on pin main body 12a, by the way that elastic portion 20 is pressed into the slot
Portion 12g, to sell main body 12a (i.e. piston pin 12) and the connection of elastic portion 20.In addition, the outer peripheral surface with elastic portion 20 is relatively matched
It is equipped with split ring 10c.
Illustrate the effect of present embodiment below.In the present embodiment, using having elastic portion 20 and Quality Mgmt Dept 18
Dynamic vibration absorber inhibits the flexible resonance of connecting rod, and the component only for the purpose of the fixation of the dynamic vibration absorber is omitted.Therefore, energy
Enough lightweights for realizing internal combustion engine and piston pin as fixed object.In addition, in the present embodiment, the exposing of elastic portion 20
Part is equivalent to the elastomer for the dynamic vibration absorber for inhibiting the flexible resonance of connecting rod, and Quality Mgmt Dept 18 is equivalent to the dynamic absorber
The mass body of device.Figure 10 is the enlarged diagram around the elastic portion 20 of Fig. 9.As shown in Figure 10, the opening portion warp of groove portion 12g
Cross chamfer machining.The exposed portion of elastic portion 20 is equivalent to the part (bullet in figure for being located at and leaning on 18 side of Quality Mgmt Dept than corner portion 12h
Property portion).Elastic portion 20 be located at than corner portion 12h by the side pin main body 12a part (linking part in figure) and pin main body 12a at
It is integrated, is functioned hardly as elastomer.In addition, according to the present embodiment, in the same manner as embodiment 1, Neng Gouyou
Effect can make key seat 10a reliable to the bearing of piston pin 12 using the space in the outside for the outer peripheral surface for being formed in elastic portion 12b.
In addition, in the present embodiment, by obtaining piston 10, pin main body 12a, Quality Mgmt Dept 18, elastic portion 20 and small end
The mass M of portion 14a entirety and the spring constant K of column portion 14c are simultaneously substituted into the formula of above-mentioned spring-mass model, so that it is determined that
The frequency that the flexible resonance of connecting rod generates.
In addition, as described above, elastic portion 20 has the through hole 20a being connected to through hole 12d.Through hole 20a and matter
Amount portion 18 is connected to.Therefore, according to the present embodiment, allow via through hole 18a, 20a stream from lubricating oil to through hole 12d
Enter, and therefore, can prevent event caused by flowing into the lubricating oil of through hole 12d to the external discharge of piston pin 12
The generation of barrier.
In addition, as shown in figure 9, in the present embodiment, the outer diameter of elastic portion 20 is smaller than the outer diameter of pin main body 12a, opening
Ring 10c and the outer peripheral surface of elastic portion 20 are relatively configured.Therefore, according to the present embodiment, it can also efficiently use and be formed in bullet
The space in the outside of the outer peripheral surface in property portion 20.In addition, according to the present embodiment, in the same manner as embodiment 1, key seat can be made
10a is reliable to the bearing of piston pin 12.
Embodiment 4.
Next, referring to Fig.1 1 to Figure 12, illustrate embodiments of the present invention 4.
Figure 11 is the schematic cross-sectional view of the end perimeter of the piston pin in the internal combustion engine of embodiments of the present invention 4.Such as figure
Shown in 11, piston pin 12 has pin main body 12a, elastic portion 12b and Quality Mgmt Dept 12c.Sell main body 12a, elastic portion 12b and Quality Mgmt Dept
There is 12c this point of through hole 12d and the size of the outer diameter of pin main body 12a, elastic portion 12b and Quality Mgmt Dept 12c to close jointly
It is identical as embodiment 1.In addition, with the outer peripheral surface of elastic portion 12b be relatively configured split ring 10c this point also with implementation
Mode 1 is identical.
Unlike embodiment 1, in the present embodiment, the capacity of Quality Mgmt Dept 12c becomes smaller.In addition, Quality Mgmt Dept 181
Additionally it is arranged in a manner of covering Quality Mgmt Dept 12c.Quality Mgmt Dept 181 is that circular pipe forms that (Quality Mgmt Dept 181 is cutd open by section
There is no particular limitation for face shape), there is the through hole 24 being connected to through hole 12d.The internal diameter of through hole 24 is than through hole 12d
Internal diameter it is small.On the end face of the Quality Mgmt Dept 181 opposite with the end face of Quality Mgmt Dept 12c, it is formed with the shape pair with Quality Mgmt Dept 12c
The groove portion 18b for the shape answered, by the way that Quality Mgmt Dept 12c is pressed into groove portion 18b, thus Quality Mgmt Dept 12c (i.e. piston pin 12) and matter
Amount portion 181 links.That is, the Quality Mgmt Dept 18 illustrated in the basic structure of Quality Mgmt Dept 181 and embodiment 2 is identical.
Unlike embodiment 2, in the present embodiment, elasticity is further provided in the outside of Quality Mgmt Dept 181
Portion 22 and Quality Mgmt Dept 182.Elastic portion 22 and Quality Mgmt Dept 182 are that circular pipe forms (elastic portion 22 and Quality Mgmt Dept 182 by section
There is no particular limitation for section shape), and there is through hole 24 jointly with Quality Mgmt Dept 181.In addition, elastic portion 22 and Quality Mgmt Dept
182 be the integral structure integrated with Quality Mgmt Dept 181.
Elastic portion 12b, 22 and Quality Mgmt Dept 12c, 181,182 constitute a dynamic vibration absorber on the whole.The dynamic absorber
Device is configured to the frequency vibration not only generated with the flexible resonance of connecting rod, is also vibrated with the frequency different from the frequency.As this
Different frequencies, for example, be set as connecting rod flexible resonance generate frequency near frequency.By being set as such frequency
Rate can reduce sound pressure level in certain frequency range of the frequency caused by the flexible resonance comprising connecting rod.
In the present embodiment, using by the first elastic portion (spring constant k1) and the first mass body (quality m1) constitute
The first dynamic vibration absorber install by the first elastic portion (spring constant k2) and the second mass body (quality m2) constitute the second power
The model of bump leveller shows dynamic vibration absorber.In addition, the model is on without premised on subtracting the 2DOF system to decline, first, second
Mass body is all used as particle.In addition, not accounting for the weight of the first, second elastic portion.
In the model, by the displacement of the first mass body and the second mass body, (two elastic portions are from the position of common equilibrium
Mobile amount of movement) when being set to x1, x2, formula (1), (2) equation of motion set up.
Formula 1
In formula (1), (2), k11=k1+k2, k22=k2, k12=k21=-k2。
Assuming that the first, second dynamic vibration absorber carries out periodic motion, then it can be by formula (1), solution x1, x2 of (2) as formula (3)
It places like that.
Formula 2
Formula (3) are substituted into formula (1), in (2), then deriving (4), (5).
Formula 3
(-m1ω2+k11)u1+k12u2=0 ... (4)
k12u1+(-m2ω2+k22)u2=0 ... (5)
Since the coefficient matrix that simple equation is found by the company of formula (4), (5) is 0, formula (6) is set up.
Formula 4
Solution formula (6), export indicate the natural frequency ω of 2DOF system entirety1、ω2Formula (7).
Formula 5
Spring constant k shown in formula (7)1It is equivalent to the spring constant of elastic portion 12b, spring constant k2It is equivalent to elastic portion
22 spring constant.In addition, quality m shown in formula (7)1It is equivalent to the whole matter comprising Quality Mgmt Dept 12c and Quality Mgmt Dept 181
Amount, quality m2It is equivalent to the quality of Quality Mgmt Dept 182.In the present embodiment, natural frequency ω shown in formula (7)1、ω2In
One side is equal to the frequency that the flexible resonance of connecting rod generates, and so that another party is equal to the target frequency different from the frequency, according in this way
To adjust the spring constant of elastic portion 12b, 22 and the quality of Quality Mgmt Dept 12c, 181,182.
In addition, in the present embodiment, by obtaining piston 10, piston pin 12, Quality Mgmt Dept 181,182,22 and of elastic portion
The mass M of small end 14a entirety and the spring constant K of column portion 14c are simultaneously substituted into the formula of above-mentioned spring-mass model, from
And determine the frequency that the flexible resonance of connecting rod generates.
Illustrate the effect of present embodiment below.In the present embodiment, using having elastic portion 12b, 22 and quality
The dynamic vibration absorber of portion 12c, 181,182 inhibits the flexible resonance of connecting rod, is omitted and is only fixed as with the dynamic vibration absorber
The component of purpose.Therefore, it can be realized the lightweight of the internal combustion engine and piston pin as fixed object.In addition, in this embodiment party
In formula, the sound pressure level under the frequency of the flexible resonance generation of connecting rod can not only be reduced, additionally it is possible to reduce different from the frequency
Frequency under sound pressure level.In addition, according to the present embodiment, in the same manner as embodiment 1, can efficiently use and be formed in bullet
The space in the outside of the outer peripheral surface of property portion 12b, can make key seat 10a reliable to the bearing of piston pin 12.
In the present embodiment, elastic portion 22 and Quality Mgmt Dept 182 are set in the outside of Quality Mgmt Dept 181.But it is also possible to
On the basis of making 181 hollow structure of Quality Mgmt Dept, elastic portion 22 and Quality Mgmt Dept 182 are accommodated in the Quality Mgmt Dept 181.Figure 12 is to use
In the figure of the variation for the internal combustion engine for illustrating embodiments of the present invention 4.As shown in figure 12, in the variation, with pin main body
12a connection Quality Mgmt Dept 181 and elastic portion 20 be integrated integral structure, be the component different from pin main body 12a (in addition
Component).The groove portion 12g of shape corresponding with the shape of the elastic portion 20 is formed on pin main body 12a, by by elastic portion 20
It is pressed into groove portion 12g, to sell main body 12a and the connection of elastic portion 20.In addition, being relatively configured with the outer peripheral surface of elastic portion 20
Split ring 10c.In addition, Quality Mgmt Dept 181 has hollow portion 181a and groove portion 181b, by the way that elastic portion 22 is pressed into the groove portion
181b, so that Quality Mgmt Dept 181 and elastic portion 20 link.
In the variation, elastic portion 20,22 and Quality Mgmt Dept 181,182 constitute a dynamic vibration absorber on the whole.In addition,
The dynamic vibration absorber is configured to the frequency vibration not only generated with the flexible resonance of connecting rod, is also shaken with the frequency different from the frequency
It is dynamic.Therefore, according to the variation, the sound pressure level under frequency caused by the flexible resonance of connecting rod can not only be reduced, moreover it is possible to
Enough sound pressure levels reduced under the frequency different from the frequency.In addition, in the variation, intrinsic frequency shown in formula (7)
ω1、ω2In a side be equal to connecting rod flexible resonance generate frequency, another party be equal to the target frequency different from the frequency,
According to the quality of the such spring constant for adjusting elastic portion 20,22 and Quality Mgmt Dept 181,182.In addition, the indentation slot of elastic portion 20
The part of portion 12g is equivalent to the linking part of pin main body 12a Yu elastic portion 20, functions hardly as elastomer.In addition, bullet
Property portion 22 the part of indentation groove portion 181b be equivalent to the linking part of groove portion 181b Yu elastic portion 22, sent out hardly as elastomer
Wave function.
Embodiment 5.
Next, 3 to Figure 14 illustrating embodiments of the present invention 5 referring to Fig.1.
Figure 13 is the schematic diagram of the end perimeter of the piston pin in the internal combustion engine of embodiments of the present invention 5.Such as Figure 13 institute
Show, piston pin 12 has pin main body 12a, elastic portion 12b and Quality Mgmt Dept 12c.Sell main body 12a, elastic portion 12b and Quality Mgmt Dept 12c
The common size relation with through hole 12d this point and the outer diameter for selling main body 12a, elastic portion 12b and Quality Mgmt Dept 12c with
Embodiment 1 is identical.
Unlike embodiment 1, in the present embodiment, Quality Mgmt Dept 12c has from the end face of the side elastic portion 12b
EF2Extend to end face (the i.e. end face EF of its opposite side1) notch section 12i.Notch section 12i is by from end face EF2To end face
EF1Quality Mgmt Dept's 12c notch is processed into arc-shaped and the part that is formed in ground.As shown in figure 13, Quality Mgmt Dept 12c has notch section
12i, as a result, the end face EF of the side Quality Mgmt Dept 12c of elastic portion 12b3Locally expose.
4 effect for illustrating present embodiment referring to Fig.1.Figure 14 is the figure for illustrating the installation gimmick of split ring 10c.Such as
In Figure 14 shown in arrow, the piston pin 12 that is mounted on of split ring 10c is inserted into while progress to pin hole 10b.Specifically, on one side
Undergauge is carried out with outer diameter of the fixture to the split ring 10c for being hung on elastic portion 12b, piston pin 12 is inserted into pin hole 10b on one side.So
Afterwards, by removing fixture from split ring 10c in the position of groove portion 10d (referring to Fig. 3), thus bullet of the split ring 10c due to itself
Property restore and expanding, and be imported into groove portion 10d.
Since groove portion 10d is formed in the inner peripheral surface of pin hole 10b, so split ring 10c needs to press from both sides to the installation of groove portion 10d
Tool is inserted into the position of groove portion 10d.The fixture be inserted in Quality Mgmt Dept 12c outer diameter it is smaller than the internal diameter of pin hole 10b in the case where base
There is no problem for this, but when the outer diameter of Quality Mgmt Dept 12c becomes larger, then correspondingly becomes difficult.Based on this point, according to Quality Mgmt Dept
12c has the present embodiment of notch section 12i, due to end face EF3C locally exposes, so the insertion of fixture facilitates.Cause
This, can make the installation exercise of split ring 10c efficient.
In the present embodiment, notch section 12i is formed in Quality Mgmt Dept 12c.But, notch section same as notch section 12i
Also the Quality Mgmt Dept 18 illustrated in embodiment 2 to 3 and the Quality Mgmt Dept illustrated in embodiment 4 181,182 are capable of forming.
In addition, in the present embodiment, the shape of notch section 12i is arc-shaped.But as long as by from Quality Mgmt Dept
The end face EF of 12c2Extend to end face EF1So as to make the end face EF of elastic portion 12b3The notch section locally exposed, then its shape
There is no particular limitation for shape, such as can be linearly, is also possible to V-shaped, rectangular shape, trapezoidal shape.
The explanation of appended drawing reference
10 pistons
10a key seat
10b pin hole
10c split ring
10d, 12g, 18b, 18c, 181b groove portion
12 piston pins
12a sells main body
12b, 20,22,121b, 122b elastic portion
The Quality Mgmt Dept of 12c, 18,181,182
12d, 12e, 12f, 14d, 14e, 18a, 20a, 24 through holes
12h corner portion
12i notch section
14 connecting rods
14a small end
The big end 14b
14c column portion
16 bushings
181a hollow portion
30 cylinders.
Claims (14)
1. a kind of internal combustion engine has the piston pin of piston and connecting rod connection, the internal combustion engine is characterized in that,
The piston pin has the pin main body and dynamic vibration absorber of tubulose, and the dynamic vibration absorber is for inhibiting along with burning
The flexible resonance of connecting rod,
It is fixed with the dynamic vibration absorber in the tube end of the pin main body,
The fixed bit of the dynamic vibration absorber is set to the side of the tube end on the central axis direction of the pin main body.
2. internal combustion engine according to claim 1, which is characterized in that
The dynamic vibration absorber has the elastic portion of tubulose, and the elastic portion is equivalent to elastomer, and has than the tube end
The small outer diameter of outer diameter,
The outer peripheral surface of the elastic portion and the inner peripheral surface of pin hole are opposite, and the pin hole is formed in key seat, are inserted into for the pin main body,
On the face opposite with the outer peripheral surface of the inner peripheral surface, it is formed with cricoid groove portion along the outer peripheral surface,
Split ring is embedded in the groove portion, the split ring has in the state of being embedded in the groove portion than the elasticity
The outer diameter in portion is big and the internal diameter smaller than the outer diameter of the tube end.
3. internal combustion engine according to claim 1 or 2, which is characterized in that
The dynamic vibration absorber has the Quality Mgmt Dept of tubulose and the elastic portion of tubulose, and the Quality Mgmt Dept is equivalent to mass body, institute
It states elastic portion and is equivalent to elastomer, the Quality Mgmt Dept is connect with the tube end, and there is the outer diameter than the tube end
Small outer diameter,
The outer peripheral surface of the elastic portion and the inner peripheral surface of pin hole are opposite, and the pin hole is formed in key seat, are inserted into for the pin main body,
On the inner peripheral surface opposite with the outer peripheral surface, it is formed with along the outer diameter of the elastic portion for split ring to be arranged
Cricoid groove portion, the split ring has internal diameter bigger than the outer diameter of the elastic portion and smaller than the outer diameter of the tube end,
The Quality Mgmt Dept has notch section, and the notch section extends to the face of its opposite side from the end face of the elastic portion side, makes
Expose the end face of the Quality Mgmt Dept side of the elastic portion.
4. internal combustion engine according to claim 1 or 2, which is characterized in that
The dynamic vibration absorber has Quality Mgmt Dept and elastic portion, and the Quality Mgmt Dept is equivalent to mass body, and the elastic portion is equivalent to
Elastomer, and the Quality Mgmt Dept is connect with the tube end,
The Quality Mgmt Dept is the other component relative to the pin main body.
5. internal combustion engine according to claim 4, which is characterized in that
The elastic portion is the other component relative to the pin main body,
The groove portion for the elastic portion to be embedded in is formed in the tube end.
6. internal combustion engine according to claim 1 or 2, which is characterized in that
The dynamic vibration absorber is the integral structure with the tube end one.
7. internal combustion engine according to claim 1 or 2, which is characterized in that
The tube end insertion is formed in the pin hole of key seat,
The dynamic vibration absorber has Quality Mgmt Dept, the end face in the outside positioned at the pin hole of the Quality Mgmt Dept and the inner wall of cylinder
Face is opposite,
The radius of curvature of the end face of the Quality Mgmt Dept opposite with the inner wall is equal with the radius of curvature of the inner wall.
8. internal combustion engine according to claim 1 or 2, which is characterized in that
The dynamic vibration absorber is configured to the frequency vibration not only generated with the flexible resonance, also to produce with the flexible resonance
The different frequency vibration of raw frequency.
9. a kind of piston pin links the piston of internal combustion engine and connecting rod, the piston pin is characterized in that having:
The pin main body of tubulose；And
Dynamic vibration absorber, the dynamic vibration absorber are used to inhibit the flexible resonance of the connecting rod along with burning,
The dynamic vibration absorber is fixed on the tube end of the pin main body,
The fixed bit of the dynamic vibration absorber is set to the side of the tube end on the central axis direction of the pin main body.
10. piston pin according to claim 9, which is characterized in that
The dynamic vibration absorber has the Quality Mgmt Dept of tubulose and the elastic portion of tubulose, and the Quality Mgmt Dept is equivalent to mass body, described
Elastic portion is equivalent to elastomer, and the Quality Mgmt Dept is connect with the tube end, and has smaller than the outer diameter of the tube end
Outer diameter,
The Quality Mgmt Dept has notch section, and the notch section extends to the end face opposite side from the end face of the elastic portion side
Face exposes the end face of the Quality Mgmt Dept side of the elastic portion.
11. piston pin according to claim 9 or 10, which is characterized in that
The dynamic vibration absorber has Quality Mgmt Dept and elastic portion, and the Quality Mgmt Dept is equivalent to mass body, and the elastic portion is equivalent to
Elastomer, and the Quality Mgmt Dept is connect with the tube end,
The Quality Mgmt Dept is the other component relative to the pin main body.
12. piston pin according to claim 11, which is characterized in that
The elastic portion is the other component relative to the pin main body,
The groove portion for the elastic portion to be embedded in is formed in the tube end.
13. piston pin according to claim 9 or 10, which is characterized in that
The dynamic vibration absorber is the integral structure with the tube end one.
14. piston pin according to claim 9 or 10, which is characterized in that
The dynamic vibration absorber is configured to the frequency vibration not only generated with the flexible resonance, also to produce with the flexible resonance
The different frequency vibration of raw frequency.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015228863A JP6274190B2 (en) | 2015-11-24 | 2015-11-24 | Internal combustion engine and piston pin |
| JP2015-228863 | 2015-11-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106763467A CN106763467A (en) | 2017-05-31 |
| CN106763467B true CN106763467B (en) | 2019-05-10 |
Family
ID=58817937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610854204.0A Expired - Fee Related CN106763467B (en) | 2015-11-24 | 2016-09-27 | Internal combustion engine and piston pin |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6274190B2 (en) |
| CN (1) | CN106763467B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60154663U (en) * | 1984-03-26 | 1985-10-15 | 日産自動車株式会社 | Piston pin for internal combustion engine |
| JPS62163365U (en) * | 1986-04-01 | 1987-10-17 | ||
| JPH10220578A (en) * | 1997-02-03 | 1998-08-21 | Isuzu Motors Ltd | Piston |
| CN101105206A (en) * | 2007-08-02 | 2008-01-16 | 力帆实业(集团)有限公司 | Motorcycle engine vibration damping device |
| CN102356256A (en) * | 2009-03-20 | 2012-02-15 | 瓦锡兰芬兰有限公司 | Piston pin and a piston - piston pin combination |
| EP2746622A1 (en) * | 2012-12-20 | 2014-06-25 | MWM GmbH | Emergency guiding element for piston pin |
| CN104454223A (en) * | 2013-09-18 | 2015-03-25 | 马自达汽车株式会社 | Piston structure for engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014034034A1 (en) * | 2012-08-29 | 2014-03-06 | マツダ株式会社 | Piston structure for engine |
-
2015
- 2015-11-24 JP JP2015228863A patent/JP6274190B2/en not_active Expired - Fee Related
-
2016
- 2016-09-27 CN CN201610854204.0A patent/CN106763467B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60154663U (en) * | 1984-03-26 | 1985-10-15 | 日産自動車株式会社 | Piston pin for internal combustion engine |
| JPS62163365U (en) * | 1986-04-01 | 1987-10-17 | ||
| JPH10220578A (en) * | 1997-02-03 | 1998-08-21 | Isuzu Motors Ltd | Piston |
| CN101105206A (en) * | 2007-08-02 | 2008-01-16 | 力帆实业(集团)有限公司 | Motorcycle engine vibration damping device |
| CN102356256A (en) * | 2009-03-20 | 2012-02-15 | 瓦锡兰芬兰有限公司 | Piston pin and a piston - piston pin combination |
| EP2746622A1 (en) * | 2012-12-20 | 2014-06-25 | MWM GmbH | Emergency guiding element for piston pin |
| CN104454223A (en) * | 2013-09-18 | 2015-03-25 | 马自达汽车株式会社 | Piston structure for engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2017096164A (en) | 2017-06-01 |
| JP6274190B2 (en) | 2018-02-07 |
| CN106763467A (en) | 2017-05-31 |
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Granted publication date: 20190510 |