CN201705490U - Piston connecting rod structure of internal combustion engine - Google Patents
Piston connecting rod structure of internal combustion engine Download PDFInfo
- Publication number
- CN201705490U CN201705490U CN2010201701595U CN201020170159U CN201705490U CN 201705490 U CN201705490 U CN 201705490U CN 2010201701595 U CN2010201701595 U CN 2010201701595U CN 201020170159 U CN201020170159 U CN 201020170159U CN 201705490 U CN201705490 U CN 201705490U
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- CN
- China
- Prior art keywords
- connecting rod
- piston
- small end
- combustion engine
- pin
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- Expired - Fee Related
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Abstract
The utility model relates to a piston connecting rod structure of an internal combustion engine, a piston is hinged with a connecting rod small end through a piston pin, the left and right sides of the connecting rod small end are symmetrically respectively provided with a slope, so that the connecting rod small end can form a wedge-shaped head part, the centers of the slopes of the symmetrical sides of the wedge-shaped head part are provided with a through hole for assembling the piston pin, the position of the piston, which is used for assembling the connecting rod, is provided with a wedge-shaped groove, and the pin hole arranged on the piston pin seat of the piston passes through the wedge-shaped groove. The utility model solves the problem that the existing piston connecting rod can not overcome the contradiction between the mass and the inertia force, and improves the property of the internal combustion engine.
Description
Technical field
The utility model is particularly related to a kind of piston connecting rod structure of internal-combustion engine.
Background technique
The piston of Small Universal internal-combustion engine is connected with connecting rod small end by wrist pin, and connnecting rod big end is connected by crank pin with bent axle, and piston drives the bent axle rotation by connecting rod during internal combustion engine.Because connecting rod carries out periodically variable to-and-fro motion and self swing with it under the driving of reciprocating motion of the pistons, what therefore connecting rod was subjected to is compression, the intersection varying load that stretching and bending etc. are very complicated, this must have enough strength and stiffness to guarantee proper functioning and working life with regard to requiring connecting rod, therefore existing piston connecting rod small end bi-side symmetrical parallel normally, see Fig. 2,5 liang of symmetrical side end face 3a of connecting rod small end are parallel, and the fitting recess both sides of corresponding piston 1 also are parallel edges, though the notch both sides of fitting recess are provided with a bit of hypotenuse 2a for the ease of assembling, this hypotenuse 2a does not surpass the pin-and-hole center line 4 of wrist pin.Adopt this parallel symmetry plane microcephaly to make the thickness of connecting rod small end can satisfy the needs of strength and stiffness.Yet, because at present to satisfy the strength and stiffness of connecting rod by the mode that guarantees connecting rod thickness, the quality of connecting rod is increased, the big more inertial force of connecting rod when moving back and forth that just makes of quality is big more, and reciprocal inertia force is big more, influence to the piston rod exercise performance is big more, can cause service life of engine and performance to suffer adverse effect thus.At quality and the conflicting problem of inertial force that piston rod exists, how to solve under the prerequisite that guarantees connecting rod strength and rigidity, reduce the problem of piston rod reciprocal inertia force, be a difficult problem of internal-combustion engine manufacturing industry for a long time always.
Summary of the invention
The purpose of this utility model provides a kind of piston connecting rod structure of internal-combustion engine, and it makes connecting rod small end adopt wedge-shaped structure, realizes reducing of connecting rod reciprocal inertia force by the quality more than needed that deducts connecting rod, can satisfy the strength and stiffness of piston rod simultaneously again.
The purpose of this utility model is achieved in that piston is hinged by wrist pin and connecting rod small end, the bilateral symmetry side of described connecting rod small end is set to the inclined-plane, make connecting rod small end form the wedge shape head, the symmetrical skew back face center of wedge shape head is provided for assembling the through hole of wrist pin, the position that being used to of described piston assembled connecting rod is set to wedge slot, and the pin-and-hole that is provided with on the piston pin boss of piston passes from wedge slot.
The angle of the medial axis of described connecting rod small end inclined-plane and connecting rod is 5 °～20 °.
The hypotenuse height of the wedge slot on the described piston is greater than the height at piston pin hole center.
Owing to adopt technique scheme, the bilateral symmetry side of connecting rod small end is set to the inclined-plane, make connecting rod small end form the wedge shape head, can be under the prerequisite of the strength and stiffness that satisfy connecting rod, reduce the quality more than needed of connecting rod to greatest extent, should " more than needed quality " be meant satisfying whole workpiece intensity, but because structural restriction, make part a part safety coefficient too high (generally greater than 5) and cause this part mass excess; The position that being used to of described piston assembled connecting rod is set to wedge slot, reduces the quality more than needed of piston equally to greatest extent.The total quality of realizing piston rod thus alleviates, and realizes reducing of piston rod reciprocal inertia force, to guarantee the mechanical property and the working life of piston rod, improves the service behaviour of internal-combustion engine simultaneously.
The angle of the medial axis of described connecting rod small end inclined-plane and connecting rod is 5 °～20 °, by this angle parameter, can guarantee that the intensity of connecting rod small end and rigidity can not weaken, and what deduct is quality more than needed.
The hypotenuse height of the wedge slot on the described piston is realized the minimizing of piston quality more than needed thus, and can not influenced piston self intensity greater than the height at piston pin hole center.
Of the present utility model simple in structure, make easily, it is by being made into connecting rod small end the wedge shape microcephaly, the connecting rod fitting recess of piston is made into wedge slot, reduced the quality more than needed of piston rod to greatest extent, the to-and-fro motion inertial force of piston rod is reduced, solved existing piston rod and can't overcome contradiction between quality and the inertial force, thereby improve the performance of internal-combustion engine.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of existing connecting rod.
In the accompanying drawing, 1 is piston, 2,2a is hypotenuse, and 3 is the inclined-plane, and 3a is the side end face, and 4 is the pin-and-hole center, and 5 is connecting rod small end, and 6 is connnecting rod big end, and 7 is through hole.
Embodiment
With reference to Fig. 1, the piston 1 of internal-combustion engine is connected with connecting rod small end 5 by wrist pin, and connnecting rod big end 6 is connected by crank pin with bent axle, and piston drives the bent axle rotation by connecting rod during internal combustion engine.The bilateral symmetry side of described connecting rod small end 5 is set to inclined-plane 3, makes connecting rod small end 5 form the wedge shape head, can reduce the quality more than needed of connecting rod to greatest extent under the prerequisite of the strength and stiffness that satisfy connecting rod.Connecting rod small end inclined-plane 3 is 5 °～20 ° with the angle of the medial axis of connecting rod, by this angle parameter, the intensity and the rigidity that can guarantee connecting rod small end can not weaken, and what deduct is quality more than needed, and the angle of the medial axis of present embodiment connecting rod small end inclined-plane and connecting rod is 10 °.Symmetrical skew back face 3 centers of wedge shape head are provided for assembling the through hole 7 of wrist pin.The position that being used to of described piston 1 assembled connecting rod is set to wedge slot, and the pin-and-hole that is provided with on the piston pin boss of piston passes from wedge slot.Hypotenuse 2 height of the wedge slot on the described piston 1 are realized the minimizing of piston quality more than needed thus, and can not influenced piston self intensity greater than the height at piston pin hole center.
The connecting rod assembly process: the connecting rod small end 5 of connecting rod is inserted the wedge slot of pistons, and the through hole of connecting rod small end 5 is relative with piston pin hole, fixes from the piston pin hole one side wrist pin of packing into.By changing the structure of connecting rod small end, can not weaken in the intensity and the rigidity that guarantee connecting rod small end, and what deduct is quality more than needed.
Claims (3)
1. the piston connecting rod structure of an internal-combustion engine, piston is hinged by wrist pin and connecting rod small end, it is characterized in that: the bilateral symmetry side of described connecting rod small end is set to the inclined-plane, make connecting rod small end form the wedge shape head, the symmetrical skew back face center of wedge shape head is provided for assembling the through hole of wrist pin, the position that being used to of described piston assembled connecting rod is set to wedge slot, and the pin-and-hole that is provided with on the piston pin boss of piston passes from wedge slot.
2. according to the piston connecting rod structure of the described internal-combustion engine of claim 1, it is characterized in that: the angle of the medial axis of described connecting rod small end inclined-plane and connecting rod is 5 °～20 °.
3. according to the piston connecting rod structure of the described internal-combustion engine of claim 1, it is characterized in that: the hypotenuse height of the wedge slot on the described piston is greater than the height at piston pin hole center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201701595U CN201705490U (en) | 2010-04-26 | 2010-04-26 | Piston connecting rod structure of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201701595U CN201705490U (en) | 2010-04-26 | 2010-04-26 | Piston connecting rod structure of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201705490U true CN201705490U (en) | 2011-01-12 |
Family
ID=43442645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201701595U Expired - Fee Related CN201705490U (en) | 2010-04-26 | 2010-04-26 | Piston connecting rod structure of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201705490U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806246A (en) * | 2010-04-26 | 2010-08-18 | 隆鑫工业有限公司 | Piston connecting rod structure of internal-combustion engine |
-
2010
- 2010-04-26 CN CN2010201701595U patent/CN201705490U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806246A (en) * | 2010-04-26 | 2010-08-18 | 隆鑫工业有限公司 | Piston connecting rod structure of internal-combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20150426 |
|
| EXPY | Termination of patent right or utility model |