CN204003929U - A kind of connecting rod small end of engine structure - Google Patents
A kind of connecting rod small end of engine structure Download PDFInfo
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- CN204003929U CN204003929U CN201420400277.9U CN201420400277U CN204003929U CN 204003929 U CN204003929 U CN 204003929U CN 201420400277 U CN201420400277 U CN 201420400277U CN 204003929 U CN204003929 U CN 204003929U
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- connecting rod
- small end
- rod small
- face
- internal face
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- 208000004141 microcephaly Diseases 0.000 claims abstract description 19
- 230000007704 transition Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 210000000707 wrist Anatomy 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 210000003625 skull Anatomy 0.000 description 1
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a kind of connecting rod small end of engine structure, comprise the connecting rod small end being connected with connecting rod shank, connecting rod small end has microcephaly hole and relative the first end face and the second end face, described the first end face and described the second end face are provided with groove, and the first end face is identical with groove location alignment and shape on the second end face.This connecting rod small end of engine structure, by the both ends of the surface at connecting rod small end, groove is set, change the structural rigidity of connecting rod small end, make the bottom semicircular center of rigidity plane stiffness of connecting rod small end large, then rigidity is successively decreased gradually to both ends of the surface, microcephaly hole is in stressed like this, because rigidity diminishes, there is deformation in microcephaly hole, present the general layout that is conducive to distribution of force, can effectively solve the situation of connecting rod small end unbalance stress, improved the lubricated of connecting rod small end, prevent the generation of inordinate wear, and do not increase any cost of production, do not increase any production difficulty.
Description
Technical field
The utility model belongs to technical field of engines, and specifically, the utility model relates to a kind of connecting rod small end of engine structure.
Background technique
The connecting rod of motor bears the Repeated Compression of the cylinder pressure box reciprocal inertia force being transmitted by piston group and draws high in high-speed motion, namely bears the alternate load that gas pressure and reciprocal inertia force produce.May produce fatigue ruption thus, be one of main stressed movement parts of internal-combustion engine.Therefore, when design, should first guarantee that connecting rod has enough fatigue strength and structural rigidity, if the fracture of connecting-rod bolts, large skull or shaft will occur insufficient rigidity, cause serious accident.Equally, if connection rod set insufficient rigidity also can be brought bad impact to the work of connecting rod.
In modern high-speed engines, connecting rod small end generally adopts thin-wall circular annular structure.This light and handy, easily manufactured, when work simple in structure stress distribution even, stock utilization is high, for wear-resisting, is also pressed with anti-wearing liner in microcephaly hole.
Connecting rod small end hole bears by wrist pin and transmits next gas blow-through pressure, due to its structural distribution, power is passed over by the side, two ends of connecting rod, the inevitable power distribution increasing gradually to two ends from central plane that forms at connecting rod small end endoporus, according to traditional design, connecting rod small end endoporus is the positive toroidal of standard, but the stressed uneven distribution that is, the stressed center stressed that is greater than in two ends, distribution of force as shown in Figure 4.When pressure surpasses a threshold value, lubricant film breaks, and surface of contact generation dry friction must cause the wearing and tearing of connecting rod small end endoporus abnormal, and abnormal sound occurs then, even the serious accident such as connecting rod small end fatigue fracture.
Therefore along with modern age high speed engine reinforcing degree more and more higher, the requirement of fuel economy is more and more stricter, traditional structural design can not meet our needs.
Model utility content
The utility model provides a kind of connecting rod small end of engine structure, and object is to prevent connecting rod small end discontinuity.
In order to solve the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of connecting rod small end of engine structure, comprise the connecting rod small end being connected with connecting rod shank, connecting rod small end has microcephaly hole and relative the first end face and the second end face, described the first end face and described the second end face are provided with groove, and the first end face is identical with groove location alignment and shape on the second end face.
Described groove is Y shape groove.
Described groove is between described microcephaly hole and described connecting rod shank.
Described groove has the first internal face, the second internal face and the 3rd internal face that is arc and protrudes towards groove inner side, the first internal face is coaxial with described microcephaly hole, the second internal face is connected with the first internal face at the two ends of the first internal face respectively with the 3rd internal face, and the second internal face and the 3rd internal face are symmetrical.
Between described the second internal face and described the 3rd internal face and described the first internal face, it is arc transition.
Described groove extends on described connecting rod shank.
Connecting rod small end of engine structure of the present utility model, by the both ends of the surface at connecting rod small end, groove is set, change the structural rigidity of connecting rod small end, make the bottom semicircular center of rigidity plane stiffness of connecting rod small end large, then rigidity is successively decreased gradually to both ends of the surface, microcephaly hole is in stressed like this, because rigidity diminishes, there is deformation in microcephaly hole, present the general layout that is conducive to distribution of force, can effectively solve the situation of connecting rod small end unbalance stress, improved the lubricated of connecting rod small end, prevent the generation of inordinate wear, and do not increase any cost of production, do not increase any production difficulty.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model connecting rod small end;
Fig. 2 is the sectional view of the utility model connecting rod small end;
Fig. 3 is the distribution of force figure of the utility model connecting rod small end;
Fig. 4 is the distribution of force figure of connecting rod small end in background technique;
Mark in above-mentioned figure is: 1, connecting rod small end; 11, microcephaly hole; 12, the first end face; 13, the second end face; 14, groove; 15, the first internal face; 16, the second internal face; 17, the 3rd internal face; 2, connecting rod shank.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, embodiment of the present utility model is described in further detail, and object is to help those skilled in the art to have more complete, accurate and deep understanding to design of the present utility model, technological scheme, and contributes to its enforcement.
As depicted in figs. 1 and 2, a kind of connecting rod small end of engine structure of the utility model, comprise the connecting rod small end 1 being connected with connecting rod shank 2, connecting rod small end 1 has microcephaly hole 11 and relative the first end face 12 and the second end face 13, the first end face 12 and the second end face 13 are provided with groove 14, the first end faces 12 with groove 14 aligned in position on the second end face 13 and shape is identical, the degree of depth is identical.
Specifically, the groove 14 on the first end face 12 and the second end face 13 is the Y shape groove forming towards connecting rod small end 1 internal recess, and two grooves 14 are symmetrical.
In length of connecting rod direction, groove 14 is between microcephaly hole 11 and connecting rod shank 2.Because the bottom of connecting rod small end 1 is main force part, groove 14 is arranged on herein, make the bottom of connecting rod small end 1 form thick middle, the thin shape in two ends, to reduce the rigidity at two ends, connecting rod is in operation and bears the pressure that wrist pin transmission comes, under large pressure-acting, the two ends, bottom of connecting rod small end 1 deform, microcephaly hole 11 diameters become large, pressure distribution is eased in both ends of the surface position, is stable and distributes on whole axial cross section, and oil film pressure is uniformly distributed, fully lubricated, so just can not there is the problem of both ends of the surface wearing and tearing.
As depicted in figs. 1 and 2, the groove 14 on the first end face 12 and the second end face 13 has the first internal face 15, the second internal face 16 and the 3rd internal face 17, the first internal faces 15, the second internal face 16 and the 3rd internal face 17 and surrounds Y-shaped groove 14.The first internal face 15, the second internal face 16 and the 3rd internal face 17 are arc and all towards groove 14 inner sides, protrude, and the first internal face 15 is coaxial with microcephaly hole 11, and the axis of the second internal face 16 and the 3rd internal face 17 is parallel with the axis of the first internal face 15.The second internal face 16 is connected with the first internal face 15 at the two ends of the first internal face 15 respectively with the 3rd internal face 17, and the second internal face 16 and the 3rd internal face 17 be take the center line of connecting rod small end 1 width direction, and to be that symmetrical line is symmetrical distribute.
As preferably, the radian of the first internal face 15 of groove 14 is 60 to 90 degree, between the second internal face 16 and the 3rd internal face 17 and the first internal face 15 and be arc transition.In addition, groove 14 is to extend on connecting rod shank 2 from connecting rod small end 1 always.
In design process, by CAE computational tool, analyze the stressing conditions in the microcephaly hole 11 of connecting rod small end 1, distribution of force figure is as shown in Figure 3.Connecting rod small end 1 structure is carried out to rational layout design simultaneously, the rigidity of the stressed high crest segment in microcephaly bottom is and stressed corresponding variation tendency.
By reference to the accompanying drawings the utility model is exemplarily described above; obviously the utility model specific implementation is not subject to the restrictions described above; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technological scheme carry out; or without improving, design of the present utility model and technological scheme are directly applied to other occasion, all within protection domain of the present utility model.
Claims (6)
1. a connecting rod small end of engine structure, comprise the connecting rod small end being connected with connecting rod shank, connecting rod small end has microcephaly hole and relative the first end face and the second end face, it is characterized in that: described the first end face and described the second end face are provided with groove, the first end face is identical with groove location alignment and shape on the second end face.
2. connecting rod small end of engine structure according to claim 1, is characterized in that: described groove is Y shape groove.
3. connecting rod small end of engine structure according to claim 2, is characterized in that: described groove is between described microcephaly hole and described connecting rod shank.
4. according to the connecting rod small end of engine structure described in claim 2 or 3, it is characterized in that: described groove has the first internal face, the second internal face and the 3rd internal face that is arc and protrudes towards groove inner side, the first internal face is coaxial with described microcephaly hole, the second internal face is connected with the first internal face at the two ends of the first internal face respectively with the 3rd internal face, and the second internal face and the 3rd internal face are symmetrical.
5. connecting rod small end of engine structure according to claim 4, is characterized in that: between described the second internal face and described the 3rd internal face and described the first internal face, be arc transition.
6. connecting rod small end of engine structure according to claim 5, is characterized in that: described groove extends on described connecting rod shank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420400277.9U CN204003929U (en) | 2014-07-19 | 2014-07-19 | A kind of connecting rod small end of engine structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420400277.9U CN204003929U (en) | 2014-07-19 | 2014-07-19 | A kind of connecting rod small end of engine structure |
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| Publication Number | Publication Date |
|---|---|
| CN204003929U true CN204003929U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420400277.9U Active CN204003929U (en) | 2014-07-19 | 2014-07-19 | A kind of connecting rod small end of engine structure |
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| CN (1) | CN204003929U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483760A (en) * | 2021-12-31 | 2022-05-13 | 宁波中策动力机电集团有限公司 | Connecting rod structure of high-power engine |
-
2014
- 2014-07-19 CN CN201420400277.9U patent/CN204003929U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483760A (en) * | 2021-12-31 | 2022-05-13 | 宁波中策动力机电集团有限公司 | Connecting rod structure of high-power engine |
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| GR01 | Patent grant |