CN202203272U

CN202203272U - Connecting rod of engine

Info

Publication number: CN202203272U
Application number: CN201120197118XU
Authority: CN
Inventors: 田放; 黄鹏华; 罗珒
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2011-06-10
Filing date: 2011-06-10
Publication date: 2012-04-25
Anticipated expiration: 2021-06-10

Abstract

The utility model provides a connecting rod of an engine, which belongs to the field of components and parts of the engine, and comprises a large end, a rod body and a small end, wherein the large end is provided with an expansion slot which is located at the expansion part of the large end and is symmetrical to an expansion splitting surface. According to the utility model, due to the arrangement of the expansion slot, an oil guiding groove and the wedge-shape small end, the problem of serious deformation of the expansion splitting surface is solved, the quality of a finished product is improved, the safety factor of the connecting rod is improved, and the design requirement of light weight of the modern engine is met.

Description

A kind of engine link

Technical field

The utility model belongs to the engine component field, relates in particular to engine link.

Background technique

Engine link comprises little head end, shaft and stub end, and its effect is that the gas pressure that piston bears is passed to bent axle, and makes the to-and-fro motion of piston change rotatablely moving of bent axle into, with external output power.

Traditional connecting rod adopts connecting rod shank and connecting rod cap split Forging Technology, and manufacturing procedure is complicated, and the Location accuracy of connecting rod shank and connecting rod cap is low, and therefore novel connecting rod is bloated, and disconnected technology is found broad application.Its principle is through designing and process the stress groove in connnecting rod big end end appropriate location, form stress and concentrate, applying perpendicular to the load of prejudging broken face again and carry out cracking.The problem that this technology exists is to expand that to separate facial disfigurement big in fracture, and it is more that material falls slag, and the assembling and positioning of connecting rod shank and connecting rod cap is accurate inadequately, has influenced end product quality.The Traditional engine connecting rod is the cooling of assurance cylinder body main thrust face and piston and lubricates, often at connnecting rod big end end design oilhole.Because the load of connnecting rod big end end is higher, the existence of oilhole makes connecting rod and connecting rod bearing exist stress to concentrate, and the safety coefficient of connecting rod is reduced greatly.

Therefore, the problem that fractured connecting rod exists at present is to expand that to separate facial disfigurement big in fracture, and it is more that material falls slag, influenced the assembling and positioning precision of connecting rod shank and connecting rod cap; Conventional linkage designs oilhole at stub end, and safety coefficient reduces greatly.

The model utility content

For solving the problem that existing technology exists (it is big that facial disfigurement is separated in the fracture of expanding, and it is more that material falls slag, locatees accurately inadequately, and safety coefficient is not high), the utility model provides a kind of engine link.

A kind of engine link comprises little head end, shaft and stub end, and stub end is provided with bloated fault trough, and bloated fault trough is positioned at the disconnected position of expanding of stub end, and separates in the face of claiming with respect to the fracture of expanding.Engine link is after the solid forging moulding; Through stress application expands disconnected at bloated fault trough place; The section stress that expands is concentrated more be prone to form, solve the bloated fracture that connnecting rod big end end size causes greatly and separated the big problem of facial disfigurement, the material that fracture causes falls slag reduces; The assembling and positioning of connecting rod shank and connecting rod cap is more accurate, has improved end product quality.

As the further improvement of the utility model, said bloated fault trough is separately positioned on the rear and front end face of stub end, all is two in the front-end face and the quantity on the ear end face of stub end, and the symmetry plane of the bloated fault trough of rear and front end face overlaps.

As the further improvement of the utility model, the width of said bloated fault trough is 2～5mm.

As the further improvement of the utility model, said stub end also is provided with the Oil Guide groove, and the normal direction angle that face is separated in the bloated fracture of the opening direction of Oil Guide groove and stub end is 15 °～30 °.The utility model is provided with the Oil Guide groove at stub end and replaces traditional stub end oilhole; Guaranteed the continuity of stub end and bearing shell area of contact; Improved the bearing capacity of connecting rod and bearing shell, improved the safety coefficient of connecting rod, the while has also guaranteed the cooling of cylinder body main thrust face and piston and has lubricated.On the rear and front end face of stub end the Oil Guide groove is set all, can the lubricant oil of connecting rod bearing shell and crankshaft-link rod collar be discharged rapidly, the heat that friction is generated is able to timely eliminating, avoids the overheated ablation fault that causes bearing shell.

As the further improvement of the utility model, said connecting rod small end end structure is wedge shape.The big end of wedge shape is compared with the wedge shape small end, and the big end of wedge shape is more near the shaft of connecting rod.Wedge shape microcephaly design can increase the bearing area of piston pin boss and connecting rod small end end, and the span of dwindling the piston pin boss fulcrum reduces the size of wrist pin, the bearing capacity of raising piston pin boss and wrist pin.The weight that wedge shape microcephaly's design can alleviate piston, connecting rod and wrist pin has satisfied the light-weight design requirement of modern engine.

Compared with prior art; The beneficial effect of the utility model is: solved the bloated fracture that connnecting rod big end end size causes greatly and separated the big problem of facial disfigurement; The material that fracture causes falls slag to be reduced, and the assembling and positioning of connecting rod shank and connecting rod cap is more accurate, has improved end product quality; Improve the bearing capacity of connecting rod and bearing shell, improved the safety coefficient of connecting rod; Improve the bearing capacity of piston pin boss and wrist pin, satisfied the light-weight design requirement of modern engine.

Description of drawings

Fig. 1 is the plan view of the utility model.

Fig. 2 is the rear view of the utility model.

Fig. 3 is the structural representation of the little head end of the utility model.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is explained further details.

As shown in Figure 1, engine link comprises that the microcephaly holds 1, shaft 2 and stub end 3.The shaft 2 one ends microcephaly that ins succession holds 1, the other end stub end 3 of ining succession, shaft 2 and microcephaly hold 1 with the joint of stub end 3 be arc transition.The fault trough 31 that expands before the front-end face of the stub end 3 of engine link is provided with two, preceding bloated fault trough 31 is positioned at the disconnected position of expanding of stub end 3, and separates in the face of claiming that the width of preceding bloated fault trough 31 is 2～5mm with respect to the fracture of expanding.Oil Guide groove 32 replaced traditional stub end 3 oilholes before the front-end face of the stub end 3 of engine link also was provided with; Preceding Oil Guide groove 32 is positioned at the non-bearing zone, and the normal direction angles that face is separated in the opening direction of preceding Oil Guide groove 32 and stub end 3 bloated fractures are 15 °～30 °.

As shown in Figure 2, the fault trough 33 that expands after the ear end face of the stub end 3 of engine link is provided with two, the back fault trough 33 that expands is positioned at the disconnected position of expanding of stub end 3, and separates in the face of claiming with respect to the fracture of expanding, and the expand width of fault trough 33 of back is 2～5mm.The ear end face of the stub end 3 of engine link also is provided with back Oil Guide groove 34 and replaces traditional stub end 3 oilholes; Back Oil Guide groove 34 is positioned at the non-bearing zone, and the normal direction angle that face is separated in the opening direction of back Oil Guide groove 34 and stub end 3 bloated fractures is 15 °～30 °.

As shown in Figure 3, the microcephaly of engine link holds 1 to be wedge shape, and the big end of wedge shape is compared with the wedge shape small end, and the big end of wedge shape is more near the shaft 2 of connecting rod.

Engine link forms through solid forging, and expand fault trough 33 and back Oil Guide groove 34 of preceding bloated fault trough 31, preceding Oil Guide groove 32, back needn't be processed behind forging molding again, makes easy.The preceding fault trough 31 that expands overlaps with the symmetry plane of the bloated fault trough 33 in back.Connecting rod shank and connecting rod cap expand to rupture with bloated fault trough 33 places, back at preceding bloated fault trough 31 and separate.During engine operation; Under the effect of inertial force; The lubricant oil of connnecting rod big end end 3 upwards splashes through preceding Oil Guide groove 32 and back Oil Guide groove 34, cylinder body main thrust face and piston is lubricated and cools off, and in time get rid of the heat of connecting rod bearing shell and journal friction generation.

Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.For the those of ordinary skill of technical field under the utility model, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be regarded as belonging to the protection domain of the utility model.

Claims

1. an engine link comprises stub end, shaft and little head end, and it is characterized in that: said stub end is provided with bloated fault trough, and bloated fault trough is positioned at the disconnected position of expanding of stub end, and separates in the face of claiming with respect to the fracture of expanding.

2. a kind of engine link according to claim 1; It is characterized in that: said bloated fault trough is separately positioned on the rear and front end face of stub end; Front-end face and the quantity on the ear end face at stub end all are two, and the symmetry plane of the bloated fault trough of rear and front end face overlaps.

3. a kind of engine link according to claim 1 and 2 is characterized in that: the width of said bloated fault trough is 2～5mm.

4. a kind of engine link according to claim 1 is characterized in that: said stub end also is provided with the Oil Guide groove, and the normal direction angle that face is separated in the bloated fracture of the opening direction of Oil Guide groove and stub end is 15 °～30 °.

5. a kind of engine link according to claim 1 is characterized in that: said microcephaly's end structure is wedge shape.