CN208456723U - The piston rod part of three-cylinder engine - Google Patents
The piston rod part of three-cylinder engine Download PDFInfo
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- CN208456723U CN208456723U CN201820623574.8U CN201820623574U CN208456723U CN 208456723 U CN208456723 U CN 208456723U CN 201820623574 U CN201820623574 U CN 201820623574U CN 208456723 U CN208456723 U CN 208456723U
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Abstract
The utility model discloses a kind of piston rod parts of three-cylinder engine, including piston, piston pin and connecting rod, piston includes piston crown and piston skirt, piston crown is equipped with first piston annular groove, second-ring groove and third piston ring groove, there is inner wall and the first lower inner wall on first in first piston annular groove, there is inner wall and the second lower inner wall on second in second-ring groove, with inner wall under inner wall in third and third in third piston ring groove, there is angle between inner wall and the first lower inner wall on first, there is angle between inner wall and the second lower inner wall on second, there is between inner wall under inner wall and third angle in third.The piston rod part of the utility model three-cylinder engine, all piston ring grooves on piston are arranged to the angle for having certain, pumping effect of the piston when moving up and down can effectively be inhibited in this way, the consumption of lubricating oil of complete machine is reduced, can prevent machine oil from scurrying into combustion chamber after-combustion leads to excessive carbon distribution.
Description
Technical field
The utility model belongs to technical field of engines, specifically, the utility model relates to a kind of three-cylinder engines
Piston rod part.
Background technique
The consumption of lubricating oil of engine is always that engine one is difficult to the difficulty overcome greatly, and the consumption of lubricating oil of available engine is big
Part is all caused by being pumped as the machine oil of lubrication piston and piston ring by the pumping effect of piston and burning into combustion chamber, this
Sample also results in excessive carbon distribution.
In addition, the engine to run at high speed can make piston pin hole, piston pin, small end of connecting rod that high-frequency opposite fortune occur
Dynamic, will lead to scratch piston pin hole inner wall there are the piston pin of sharp edge leads to piston Strength Changes and other many exceptions, is filling
Piston pin, small end of connecting rod etc. are scratched with also resulting in the process, it is serious to damage piston when may cause assembly.
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model mentions
For a kind of piston rod part of three-cylinder engine, it is therefore an objective to reduce consumption of lubricating oil.
To achieve the goals above, the technical solution that the utility model is taken are as follows: the piston rod part of three-cylinder engine,
Including piston, piston pin and connecting rod, piston includes the piston crown being connected and piston skirt, and it is living that piston crown is equipped with first
Plug ring slot, second-ring groove and third piston ring groove, have in first piston annular groove on positioned opposite first inner wall and
First lower inner wall, second-ring groove is interior to have inner wall and the second lower inner wall, third piston on positioned opposite second
There is in annular groove in third positioned opposite inner wall under inner wall and third, on described first inner wall and it is described first it is lower in
There is angle, inner wall and described second descends to have angle between inner wall on described second, interior in the third between wall surface
There is between inner wall angle under wall surface and the third.
Inner wall on described first, inner wall is parallel in inner wall and the third on described second, under described first
Inner wall is parallel under inner wall, the second lower inner wall and the third.
Angle on described first between inner wall and the first lower inner wall is 0 ° 30 ', inner wall on described second
Angle between the described second lower inner wall is 0 ° 30 ', in the third under inner wall and the third between inner wall
Angle is 0 ° 30 '.
The distance between inner wall is greater than inner wall and institute on described second on inner wall and described second on described first
State the distance between inner wall in third.
The piston skirt includes main thrust side skirt wall, secondary thrust sides skirt wall and main thrust side skirt wall and the piston head
First reinforcing rib of portion's connection and the second reinforcing rib for connect with secondary thrust sides skirt wall and piston crown, main thrust side skirt wall with
Secondary thrust sides skirt wall is that wall thickness positioned opposite and main thrust side skirt wall is greater than time wall thickness of thrust sides skirt wall.
First reinforcing rib is arranged two, and second reinforcing rib is arranged two, between two the first reinforcing ribs away from
From less than the distance between two second reinforcing ribs.
The piston skirt further includes connecting the face-port of the main thrust side skirt wall and the secondary thrust sides skirt wall and setting
The key seat being placed on face-port, key seat have pin hole, and face-port is equipped with weight loss groove and concave inward structure, and the depth of weight loss groove is the work
0.4~0.6 times of the height of plug head is provided with third reinforcing rib, third reinforcing rib and face-port and piston crown in weight loss groove
Connection.
The concave inward structure is located at the two sides of main thrust side skirt wall and the secondary thrust sides skirt wall.
The piston pin includes cylindrical piston pin ontology and the end construction that connect with piston pin ontology, end construction
With an end face, a circular conical surface, the first guide surface being connect with end face and circular conical surface and connect with circular conical surface second
Guide surface, the first guide surface and the second guide surface are arc surface, and circular conical surface is between the first guide surface and the second guide surface.
The radius of first guide surface and second guide surface is 0.3mm.
The piston rod part of the utility model three-cylinder engine, all piston ring grooves on piston are arranged to have
Certain angle can effectively inhibit pumping effect of the piston when moving up and down in this way, reduce the consumption of lubricating oil of complete machine,
Can prevent machine oil from scurrying into combustion chamber after-combustion leads to excessive carbon distribution；It is fallen simultaneously by the way that two circles are arranged in the end of piston pin
Angle, can be effectively prevented piston pin assembly and engine operation process in scratch, also avoid engine piston and
The components such as connecting rod damage.
Detailed description of the invention
This specification includes the following drawings, and shown content is respectively:
Fig. 1 is the structural schematic diagram of the piston rod part of the utility model three-cylinder engine；
Fig. 2 is the cross-sectional view of piston；
Fig. 3 is enlarged drawing at A in Fig. 2；
Fig. 4 is the structural schematic diagram of piston；
Fig. 5 is the enlarged drawing at pin hole；
Fig. 6 is the structural schematic diagram of pin hole；
Fig. 7 is the structural schematic diagram at piston skirt；
Fig. 8 is the structural schematic diagram of piston pin；
Fig. 9 is enlarged drawing at B in Fig. 8；
In the figure, it is marked as inner wall on 1, first；2, the first lower inner wall；3, inner wall on second；4, the second lower inner wall
Face；5, inner wall in third；6, inner wall under third；7, face-port；8, key seat；9, main thrust side skirt wall；10, secondary thrust side skirt
Wall；11, the first inner headed face；12, the second inner headed face；13, third inner headed face；14, the first reinforcing rib；15, the second reinforcing rib；16,
Third reinforcing rib；17, weight loss groove；18, concave inward structure；19, long axis；20, short axle；21, pin hole；22, piston pin ontology；23, outer
Disc；24, the first guide surface；25, the second guide surface；26, end face；27, circular conical surface；28, connecting rod.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to specific embodiment of the present utility model further detailed
Thin explanation, it is therefore an objective to help those skilled in the art to the design of the utility model, technical solution have it is more complete, accurate and
Deep understanding, and facilitate its implementation.
As shown in Figure 1 to Figure 3, the utility model provides a kind of piston rod part of three-cylinder engine, including piston,
One end of piston pin and connecting rod 28, connecting rod 28 is connect by piston pin with piston, and the other end of connecting rod 28 with crankshaft for connecting.
Piston includes the piston crown being connected and piston skirt, piston crown be equipped with first piston annular groove, second-ring groove and
Third piston ring groove, first piston annular groove is interior to have inner wall 1 and the first lower inner wall 2 on positioned opposite first, and second is living
There is inner wall 3 and the second lower inner wall 4 on positioned opposite second in plug ring slot, have in third piston ring groove positioned opposite
Third on inner wall 6 under inner wall 5 and third, there is on first angle between inner wall 1 and the first lower inner wall 2, second
There is angle between upper inner wall 3 and the second lower inner wall 4, there is folder between inner wall 6 under inner wall 5 and third in third
Angle.
Specifically, as shown in Figures 2 and 3, first piston annular groove, second-ring groove and third piston ring groove are in work
For installing along the annular groove entirely circumferentially extended, first piston annular groove and second-ring groove on the periphery of plug head
Compression ring primarily serves the effect of sealing and heat transfer, is used to install oil ring, first piston annular groove, second in third piston ring groove
Piston ring groove and third piston ring groove are set gradually on piston crown for the axial direction along piston crown, the position of first piston annular groove
Nearly top land is rested against, third piston ring groove is located proximate to piston skirt.
As shown in Figures 2 and 3, inner wall 5 is parallel in inner wall 3 and third on inner wall 1, second on first, and first
Inner wall 6 is parallel under the lower inner wall 4 of lower inner wall 2, second and third.Inner wall 3, third on inner wall 1, second on first
Inner wall is the lesser circular conical surface of taper under the lower inner wall 4 of the lower inner wall 2, second of upper inner wall 5, first and third, on first
Inner wall 3 on inner wall 1, second, inner wall is under the lower inner wall 4 of the lower inner wall 2, second of inner wall 5, first and third in third
It is coaxially disposed and coaxial with piston crown.First piston annular groove also has the first inner headed face 11, on first under inner wall 1 and first
A centre bore is all had at the center of inner wall 2, the aperture of the centre bore of inner wall 1 and the first lower inner wall 2 is big on first
Small identical and coaxial, the first inner headed face 11 is located on first in the centre bore of inner wall 1 and the first lower inner wall 2, the first inner circle
Face 11 is anchor ring and its bus is the circular arc line with certain radian, inner wall on the top edge and first of the first inner headed face 11
1 inward flange (edge at diameter minimum) connection, the inward flange of the lower edge of the first inner headed face 11 and the first lower inner wall 2
(edge at diameter minimum) connects, the outer edge (edge of diameter maximum) of inner wall 1 and the first lower inner wall 2 on first
It is connect with the periphery of piston crown.Second-ring groove also has the second inner headed face 12, interior under inner wall 3 and second on second
A centre bore is all had at the center of wall surface 4, the pore size of the centre bore of inner wall 3 and the second lower inner wall 4 on second
Identical and coaxial, the second inner headed face 12 is located on second in the centre bore of inner wall 3 and the second lower inner wall 4, the second inner headed face
12 be anchor ring and its bus is the circular arc line with certain radian, inner wall 3 on the top edge and second of the second inner headed face 12
Inward flange (edge at diameter minimum) connection, the inward flange of the lower edge of the second inner headed face 12 and the second lower inner wall 4 is (directly
Edge at diameter minimum) connection, on second the outer edge (edge of diameter maximum) of inner wall 3 and the second lower inner wall 4 with
The periphery of piston crown connects.Third piston ring groove also has third inner headed face 13, inner wall under inner wall 5 and third in third
A centre bore is all had at the center in face 6, in third under inner wall 5 and third the centre bore of inner wall 6 pore size phase
With and it is coaxial, third inner headed face 13 is located in third under inner wall 5 and third in the centre bore of inner wall 6, third inner headed face 13
For anchor ring and its bus is the circular arc line with certain radian, inner wall 5 on the top edge of third inner headed face 13 and third
Inward flange (edge at diameter minimum) connects, the inward flange (diameter of inner wall 6 under the lower edge and third of third inner headed face 13
The edge at minimum place) connection, the outer edge (edge of diameter maximum) of inner wall 6 and work under inner wall 5 and third in third
The periphery of plug head connects.
As shown in Figures 2 and 3, preferably, the angle on first between inner wall 1 and the first lower inner wall 2 is 0 °
30 ' (i.e. 0.5 °), the vertical range on first between inner wall 1 and the first lower inner wall 2 are from the axis close to piston crown
Start to be gradually reduced along the axial location of piston crown being radially orientated far from piston crown at position, i.e., inner wall on first
Vertical range between the inward flange in face 1 and the inward flange of the first lower inner wall 2 is greater than on first the outer edge of inner wall 1 and the
The vertical range between the outer edge of inner wall 2 once, and hanging down between the outer edge and piston-top surface of inner wall 1 on first
Straight distance is greater than the vertical range on first between the inward flange and piston-top surface of inner wall 1, the outer edge of the first lower inner wall 2
Vertical range between piston-top surface is less than the vertical range between the inward flange and piston-top surface of the first lower inner wall 2, peace
Piston ring in first piston annular groove thickness (thickness refer between the upper and lower surfaces of piston ring it is vertical away from
From) less than first on vertical range between inner wall 1 and the first lower inner wall 2, it is living thus on piston into moving process
There is gap between the lower surface of plug ring and the first lower inner wall 2, which forms the oil storage space for accommodating machine oil, avoid machine oil
Be squeezed into combustion chamber and burn, equally during piston moves down, on the upper surface of piston ring and first inner wall 1 it
Between have gap, the gap formed accommodate machine oil oil storage space, avoid machine oil from being squeezed into combustion chamber and burn.That is,
During piston up-down, first piston annular groove can form the oil storage space for accommodating machine oil, Ke Yiyou between piston ring
Effect inhibits pumping effect of the piston when moving up and down, and avoids machine oil from being squeezed into combustion chamber and burn, to reduce
The consumption of machine oil, and the angle on first between inner wall 1 and the first lower inner wall 2 is arranged to 0.5 °, and effect is best.
As shown in Figures 2 and 3, preferably, the also angle on second between inner wall 3 and the second lower inner wall 4 is
0 ° 30 ' (i.e. 0.5 °), the vertical range on second between inner wall 3 and the second lower inner wall 4 is from the axis close to piston crown
Start to be gradually reduced along the axial location of piston crown being radially orientated far from piston crown at line position, i.e., on second in
Vertical range between the inward flange of wall surface 3 and the inward flange of the second lower inner wall 4 be greater than on second the outer edge of inner wall 3 and
Vertical range between the outer edge of second lower inner wall 4, and on second between the outer edge and piston-top surface of inner wall 3
Vertical range is greater than the vertical range on second between the inward flange and piston-top surface of inner wall 3, the outside of the second lower inner wall 4
Vertical range between edge and piston-top surface descends the vertical range between the inward flange and piston-top surface of inner wall 4 less than second,
(thickness refers to vertical between the upper and lower surfaces of piston ring the thickness for the piston ring being mounted in second-ring groove
Distance) less than second on vertical range between inner wall 3 and the second lower inner wall 4, thus on piston into moving process,
There is gap between the lower surface of piston ring and the second lower inner wall 4, which forms the oil storage space for accommodating machine oil, avoid machine
Oil is squeezed into combustion chamber and burns, equally during piston moves down, inner wall 3 on the upper surface of piston ring and second
Between have gap, the gap formed accommodate machine oil oil storage space, avoid machine oil from being squeezed into combustion chamber and burn.That is,
During piston up-down, second-ring groove can form the oil storage space for accommodating machine oil between piston ring, can be with
The effective pumping effect for inhibiting piston when moving up and down, avoids machine oil from being squeezed into combustion chamber and burn, to reduce
The consumption of machine oil, and the angle on second between inner wall 3 and the second lower inner wall 4 is arranged to 0.5 °, and effect is best.
As shown in Figures 2 and 3, preferably, the also angle in third under inner wall 5 and third between inner wall 6 is
0 ° 30 ' (i.e. 0.5 °), the vertical range in third under inner wall 5 and third between inner wall 6 is from the axis close to piston crown
Start to be gradually reduced along the axial location of piston crown being radially orientated far from piston crown at line position, i.e., in third in
Vertical range under the inward flange and third of wall surface 5 between the inward flange of inner wall 6 be greater than in third the outer edge of inner wall 5 and
Vertical range under third between the outer edge of inner wall 6, and in third between the outer edge and piston-top surface of inner wall 5
Vertical range is greater than the vertical range in third between the inward flange and piston-top surface of inner wall 5, the outside of inner wall 6 under third
Vertical range between edge and piston-top surface is less than the vertical range under third between the inward flange and piston-top surface of inner wall 6,
(thickness refers to vertical between the upper and lower surfaces of piston ring the thickness for the piston ring being mounted in third piston ring groove
Distance) less than the vertical range between inner wall 6 under inner wall 5 in third and third, thus on piston into moving process,
There is gap, which forms the oil storage space for accommodating machine oil, avoid machine under the lower surface of piston ring and third between inner wall 6
Oil is squeezed into combustion chamber and burns, equally during piston moves down, inner wall 5 on the upper surface of piston ring and third
Between have gap, the gap formed accommodate machine oil oil storage space, avoid machine oil from being squeezed into combustion chamber and burn.That is,
During piston up-down, third piston ring groove can form the oil storage space for accommodating machine oil between piston ring, can be with
The effective pumping effect for inhibiting piston when moving up and down, avoids machine oil from being squeezed into combustion chamber and burn, to reduce
The consumption of machine oil, and the angle in third under inner wall 5 and third between inner wall 6 is arranged to 0.5 °, and effect is best.
As shown in Figures 2 and 3, the distance between inner wall 3 is greater than inner wall on second on inner wall 1 and second on first
The distance between 3 and inner wall 5 in third.
As shown in Fig. 2, Fig. 4 and Fig. 7, piston skirt includes main thrust side skirt wall 9, secondary thrust sides skirt wall 10 and main thrust
Side skirt wall 9 and piston crown connection the first reinforcing rib 14 and connect with secondary thrust sides skirt wall 10 and piston crown second add
Strengthening tendons 15, main thrust side skirt wall 9 and time thrust sides skirt wall 10 are positioned opposite and main thrust side skirt wall 9 and time thrust sides skirt wall 10
On the same straight line perpendicular in the axis (namely axis of piston entirety) with piston crown, main thrust side skirt wall 9 and time
Thrust sides skirt wall 10 is arc-shaped structure, main thrust side skirt wall 9 and time thrust sides skirt wall 10 be fixedly connected with piston crown and
Extend towards the lower section of piston crown.
The area of main thrust side skirt wall 9 is less than time area of thrust sides skirt wall 10, after so that main thrust side skirt wall 9 is absorbed load
Time thrust sides skirt wall 10 is decomposed by face-port 7, meanwhile, keep the deformation of main thrust side skirt wall 9 small.Preferably, main thrust
The wall thickness of side skirt wall 9 is greater than time wall thickness of thrust sides skirt wall 10, and the wall thickness of main thrust side skirt wall 9 is preferably 2.35mm, secondary thrust
The thickness of side skirt wall 10 is preferably 2mm, secondary 10 wall thickness reduction of thrust sides skirt wall, in this way while ensuring piston skirt intensity,
Piston total quality can be mitigated, the reciprocal inertia force and corresponding reciprocal inertia force square of bent machine system is greatly reduced, subtract
The vibration of few engine, promotes engine level of NVH.
As shown in fig. 7, in the present embodiment, the first reinforcing rib 14 setting two, the second reinforcing rib 15 setting two, first
The setting of reinforcing rib 14 and the second reinforcing rib 15, ensure that the structural strength of piston skirt.Two the first reinforcing ribs 14 are located at master
The inside of thrust sides skirt wall 9 and the first reinforcing rib 14 is connect with the inner wall of main thrust side skirt wall 9, two the first reinforcing ribs 14 are simultaneously
To be sequentially arranged along the circumferential direction of main thrust side skirt wall 9, two the second reinforcing ribs 15 are located at time inside of thrust sides skirt wall 10 and the
Two reinforcing ribs 15 connects with the inner wall of time thrust sides skirt wall 10, two the second reinforcing ribs 15 and be along secondary thrust sides skirt wall 10
It is circumferentially sequentially arranged, the distance between two first reinforcing ribs 14 are less than the distance between two second reinforcing ribs 15, due to master
Stress is larger at thrust sides skirt wall 9, and two the first reinforcing ribs 14 are arranged relatively close, facilitates the structural strength for ensuring piston skirt
And the bonding strength with piston crown.
As shown in Figure 2 and Figure 4, piston skirt further includes the face-port 7 for connecting main thrust side skirt wall 9 and time thrust sides skirt wall 10
And it is set to the key seat 8 on face-port 7, key seat 8 has the pin hole for allowing piston pin to be inserted into, and face-port 7 is equipped with weight loss groove 17
With concave inward structure 18.Weight loss groove 17 is the groove being arranged on face-port 7, and the depth of weight loss groove 17 is the height of piston crown
0.4~0.6 times, third reinforcing rib 16 is provided in weight loss groove 17, third reinforcing rib 16 is connect with face-port 7 and piston crown, face
Window 7 is arranged two and two face-ports 7 are located between main thrust side skirt wall 9 and secondary thrust sides skirt wall 10.Third reinforcing rib 16 is arranged
To be welded in weight loss groove 17, third reinforcing rib 16 is simultaneously extended on face-port 7, and third reinforcing rib 16 is located at the outside of face-port 7, the
Three reinforcing ribs 16 are connect with the outside wall surface of face-port 7, and third reinforcing rib 16 is the strengthening rib strip with bending, and such structure increases
The structural strength of piston skirt and the bonding strength with piston crown.
As shown in Figure 2 and Figure 4, the third reinforcing rib 16 connecting with each face-port 7 is at least provided with a, with the same face-port
All third reinforcing ribs 16 of 7 connections in the two sides of pin hole, improve the intensity of piston pin installation site, improve using the longevity respectively
Life.
As shown in Figure 2 and Figure 4, concave inward structure 18 is located at the two sides of main thrust side skirt wall 9 and time thrust sides skirt wall 10, promotes mainly
A concave inward structure 18 is respectively set in the two sides of power side skirt wall 9, and an indent knot is respectively set in the two sides of secondary thrust sides skirt wall 10
Structure 18, each weight loss groove 17 are located between two concave inward structures 18, and each third reinforcing rib 16 is located at weight loss groove 17 and one
Between a concave inward structure 18.Concave inward structure 18 is the groove being arranged on face-port 7, and the setting of concave inward structure 18 further mitigates
Piston total quality, the reciprocal inertia force and corresponding reciprocal inertia force square, reduction for greatly reducing bent machine system start
The vibration of machine promotes engine level of NVH.
As shown in Figure 2, Figure 5 and Figure 6, key seat 8 is arranged two, and two key seats 8 are fixedly connected with a face-port 7 respectively, respectively
A pin hole is respectively set on a key seat 8, the both ends of piston pin are inserted into respectively in a pin hole.Preferably, pin hole is ellipse
Round hole, the cross section (section that the cross section refers to axis perpendicular parallel with the axis of piston and with pin hole) of pin hole
Minor axis dimension (short axle of pin shaft and the axis of piston are spatially perpendicular) for ellipse, pin hole is kept constant, pin hole
Major axis dimension (long axis of pin shaft and the axis of piston are parallel) is to be gradually increased.In the axial direction of pin hole, at each position
Minor axis dimension size is identical, and the major axis dimension at each position is gradually to increase since one end far from piston axis to the other end
Big, and piston pin is straight pin, so when the engine is working, gudgeon pin shaft can change up and down in the range of pin hole,
To playing a protective role to pin hole, the deformation quantity of piston piston pin by maximum outbreak pressure when is complied with, piston is made
The uniform load of pin hole wall is distributed, and prevents from being broken at pin hole.
As shown in Figure 8 and Figure 9, piston pin includes cylindrical piston pin ontology 22 and the end that connect with piston pin ontology 22
Portion's structure, end construction have an end face 26 and a circular conical surface 27, and end construction also has and end face 26 and circular conical surface 27
First guide surface 24 of connection and the second guide surface 25 being connect with circular conical surface 27, the first guide surface 24 and the second guide surface 25
For arc surface, circular conical surface 27 is between the first guide surface 24 and the second guide surface 25.
As shown in Figure 8 and Figure 9, piston pin ontology 22 is the cylindrical structure of inner hollow, and the end construction of piston pin is set
Two are set, two end constructions are fixedly connected with one end of piston pin ontology 22 respectively, and piston pin ontology 22 is located at two ends
Between structure, end construction is cirque structure and end construction and piston pin ontology 22 is coaxial arrangement.Piston pin ontology 22
Periphery 2 be cylindrical surface, the first guide surface 24 positioned at end face 26 and circular conical surface 27 between, end face 26 for and piston pin ontology 22
Axis perpendicular plane, circular conical surface 27 have a bigger diameter end and a miner diameter end, the diameter of the bigger diameter end of circular conical surface 27
Greater than the diameter of miner diameter end, the diameter of the bigger diameter end of circular conical surface 27 is less than the diameter of periphery 2, the miner diameter end of circular conical surface 27 it is straight
Diameter is greater than the overall diameter of end face 26, and an end margin of the first guide surface 24 is connect with the outer edge of end face 26, the first guide surface 24
Another end margin connect with the edge at the miner diameter end of circular conical surface 27, an end margin of the second guide surface 25 and periphery 2
End edge connection, another end margin of the second guide surface 25 are connect with the edge at the bigger diameter end of circular conical surface 27, the first guidance
Face 24 and the second guide surface 25 are with end face 26, circular conical surface 27 and periphery 2 and to be coaxially disposed.First guide surface 24 and second is drawn
The setting of guide face 25 so that between end face 26 and circular conical surface 27, between circular conical surface 27 and periphery 2 be arc transition, thus
Piston pin can be effectively prevented to scratch in assembly and engine operation process, also avoid the piston and connecting rod of engine
Equal components damage.
Preferably, the radius of the first guide surface 24 is 0.3mm, the radius of the second guide surface 25 is 0.3mm, entire living
The assembling process smooth of plug pin, effect is more preferable, and the first guide surface 24 is identical with the radius size of the second guide surface 25, convenient
Processing.
Preferably, the periphery 23 of piston pin ontology 22 is equipped with spiral shape lubrication groove, spiral shape lubrication groove is used for
Lubricating oil is stored, spiral shape lubrication groove is the groove extended on the periphery 23 of piston pin ontology 22 along axial screw and spiral
Shape lubrication groove is from one end of piston pin ontology 22 to extend to the other end, can reduce in this way piston pin in piston pin hole and
Frictional resistance in connecting rod aperture.
In order to further decrease friction, one layer of baking vanish can be applied on the periphery 23 of piston pin ontology 22, is preferably rubbed
Erasing layer or noncrystalline piston material, preferably diamond shape carbon (DLC), coating also enhance work while reducing frictional influence
The wearability of plug pin.
The utility model is exemplarily described in conjunction with attached drawing above.Obviously, the utility model implements not
It is limited by aforesaid way.As long as the various unsubstantialities that the method concept and technical solution that use the utility model carry out
Improvement；Or it is not improved, the above-mentioned conception and technical scheme of the utility model are directly applied into other occasions, at this
Within the protection scope of utility model.
Claims (10)
1. the piston rod part of three-cylinder engine, including piston, piston pin and connecting rod, piston includes the piston crown being connected
And piston skirt, piston crown are equipped with first piston annular groove, second-ring groove and third piston ring groove, first piston annular groove
It is interior that there is inner wall and the first lower inner wall on positioned opposite first, have on positioned opposite second in second-ring groove
Inner wall and the second lower inner wall have in third positioned opposite inner wall under inner wall and third in third piston ring groove,
First piston annular groove, second-ring groove and third piston ring groove are to prolong on the periphery of piston crown structure along entire circumferential direction
Annular groove and first piston annular groove, second-ring groove and the third piston ring groove stretched are in piston crown structure for along piston
The axial direction of head construction is set gradually, and first piston annular groove is located proximate to top land, and third piston ring groove is located proximate to
Piston skirt, it is characterised in that: inner wall and described first descends to have angle between inner wall on described first, on described second
There is angle between inner wall and the second lower inner wall, have between inner wall under inner wall and the third in the third
There is angle, inner wall on first, inner wall on second, inner wall, the first lower inner wall, the second lower inner wall and third in third
Lower inner wall is circular conical surface.
2. the piston rod part of three-cylinder engine according to claim 1, it is characterised in that: inner wall on described first
Face, inner wall is parallel in inner wall and the third on described second, the described first lower inner wall, the second lower inner wall
It is parallel with inner wall under the third.
3. the piston rod part of three-cylinder engine according to claim 2, it is characterised in that: inner wall on described first
And the angle under described first between inner wall is 0 ° 30 ', on described second between inner wall and the second lower inner wall
Angle is 0 ° 30 ', and the angle in the third under inner wall and the third between inner wall is 0 ° 30 '.
4. the piston rod part of three-cylinder engine according to any one of claims 1 to 3, it is characterised in that: described first
On upper inner wall and described second the distance between inner wall be greater than on described second in inner wall and the third inner wall it
Between distance.
5. the piston rod part of three-cylinder engine according to any one of claims 1 to 3, it is characterised in that: the piston
Skirt section includes main thrust side skirt wall, secondary thrust sides skirt wall, the first reinforcement connecting with main thrust side skirt wall and the piston crown
Muscle and the second reinforcing rib connecting with secondary thrust sides skirt wall and piston crown, main thrust side skirt wall and time thrust sides skirt wall are phase
Time wall thickness of thrust sides skirt wall is greater than to the wall thickness of arrangement and main thrust side skirt wall.
6. the piston rod part of three-cylinder engine according to claim 5, it is characterised in that: first reinforcing rib is set
Set two, second reinforcing rib is arranged two, between less than two the second reinforcing ribs of the distance between two first reinforcing ribs
Distance.
7. the piston rod part of three-cylinder engine according to claim 5, it is characterised in that: also wrap the piston skirt
The key seat for connecting the face-port of the main thrust side skirt wall and the secondary thrust sides skirt wall and being set on face-port is included, key seat has
Pin hole, face-port are equipped with weight loss groove and concave inward structure, and the depth of weight loss groove is 0.4~0.6 times of the height of the piston crown,
Third reinforcing rib is provided in weight loss groove, third reinforcing rib is connect with face-port and piston crown.
8. the piston rod part of three-cylinder engine according to claim 7, it is characterised in that: the concave inward structure is located at
The two sides of main thrust side skirt wall and the secondary thrust sides skirt wall.
9. the piston rod part of three-cylinder engine according to any one of claims 1 to 3, it is characterised in that: the piston
Pin includes cylindrical piston pin ontology and the end construction connecting with piston pin ontology, and end construction has end face, one
A circular conical surface, the first guide surface being connect with end face and circular conical surface and the second guide surface being connect with circular conical surface, the first guidance
Face and the second guide surface are arc surface, and circular conical surface is between the first guide surface and the second guide surface.
10. the piston rod part of three-cylinder engine according to claim 9, it is characterised in that: first guide surface
Radius with second guide surface is 0.3mm.
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| CN201820623574.8U CN208456723U (en) | 2018-04-28 | 2018-04-28 | The piston rod part of three-cylinder engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757205A (en) * | 2018-04-28 | 2018-11-06 | 江西腾勒动力有限公司 | The piston rod part of three-cylinder engine |
| CN115653749A (en) * | 2022-09-20 | 2023-01-31 | 上汽通用五菱汽车股份有限公司 | Crankshaft connecting rod assembly, engine and automobile |
-
2018
- 2018-04-28 CN CN201820623574.8U patent/CN208456723U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757205A (en) * | 2018-04-28 | 2018-11-06 | 江西腾勒动力有限公司 | The piston rod part of three-cylinder engine |
| CN115653749A (en) * | 2022-09-20 | 2023-01-31 | 上汽通用五菱汽车股份有限公司 | Crankshaft connecting rod assembly, engine and automobile |
| CN115653749B (en) * | 2022-09-20 | 2023-08-29 | 上汽通用五菱汽车股份有限公司 | Crankshaft connecting rod assembly, engine and automobile |
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