CN202391940U

CN202391940U - Engine connecting rod

Info

Publication number: CN202391940U
Application number: CN201120489183XU
Authority: CN
Inventors: 王占朋; 王鹏; 苏正杲
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2011-11-30
Filing date: 2011-11-30
Publication date: 2012-08-22
Anticipated expiration: 2021-11-30

Abstract

The utility model discloses an engine connecting rod, comprising a small head, a rod body and a large head, wherein a transition part of the small head and the rod body is provided with a reinforcing rib extending from the small head to the large head; furthermore, the transition part is a large-radius round-angle transition part. Through the structure of the engine connecting rod, the strength and the stiffness of the small head are increased, the stress on the transition part of the small head and the rod body can be reduced, the purpose of increasing the strength of the connecting rod is realized, and the safety and the reliability of operation of an engine are improved. The engine connecting rod disclosed by the utility model has the advantages of simple and compact structure, small volume, light mass, high efficiency and low cost, and is suitable for various vehicles.

Description

Engine link

Technical field

The utility model belongs to the power plant field, especially relates to a kind of engine component, specifically a kind of engine link.

Background technique

As one of kernel component of motor, connecting rod is made up of microcephaly, shaft and major part, and its function is that the power that piston bears is passed to bent axle, and changes the to-and-fro motion of piston into bent axle rotatablely move.Connecting rod small end is connected with wrist pin, and is reciprocating together with piston; Connnecting rod big end is connected with crank pin, rotates together with bent axle, and therefore connecting rod is done complicated plane motion when engine operation.Connecting rod mainly bears stress alternations such as compression, stretching and bending, requires connecting rod that enough fatigue strength and structural rigidity must be arranged.

At present, connecting rod small end generally adopts the thin wall circular structure on the high speed engine, and like Fig. 4, shown in Figure 5, the connecting rod strength and the rigidity of this structure are lower.Along with improving constantly of motor reinforcing degree; The load that connecting rod bears is also increasingly high; If adopt this traditional thin wall circular structure, the strength and stiffness deficiency can appear in the stressed bigger side of connecting rod small end, and microcephaly and shaft transition position the bigger phenomenon of localized stress can appear especially; The connecting rod cracking that may cause motor when serious influences the Security and the reliability of engine operation.

Usually; Can strengthen the strength and stiffness of connecting rod small end through strengthening the connecting rod small end size; But so not only can increase the size and the weight of connecting rod self, compactedness motor preferably also increases piston compression height and cylinder body height possibly, and the quality of piston rod group will increase greatly; Simultaneously, be again movement parts because connecting rod is a force transmission element, for the reciprocal inertia force of equalizing piston connection rod set, also must increase the quality of bent axle and trunnion shaft, be unfavorable for the light-weight design and the compactedness of motor.Therefore when carrying out the engine link design, must consider how under the prerequisite that does not strengthen the connecting rod small end size, to improve microcephaly's strength and stiffness, and avoid stress to concentrate.

The model utility content

The technical problem that the utility model will solve provides a kind of engine link, through increasing microcephaly's strength and stiffness, can reducing the stress of microcephaly and shaft transition position, realizes improving the purpose of connecting rod strength, improves the Security and the reliability of engine operation.The utlity model has simple and compact for structure, volume is little, light weight and the low characteristics of cost.

For solving the problems of the technologies described above, the technological scheme that the utility model is taked is:

A kind of engine link comprises microcephaly, shaft and major part, and microcephaly and shaft transition position are provided with the stiffening rib that extends to microcephaly's direction from major part.

Said stiffening rib respectively has two places in the two sides, front and back, is symmetrical set between every two places and the general structure of the two is the W type.

Said microcephaly and shaft joint are round-corner transition, and the radius of fillet is 5～15mm.(stress that can reduce both transition positions is concentrated, and has improved the fatigue strength of intermediate location, reduces the possibility that there is fracture hidden danger in weak link.）

The further feature of the utility model also has: stiffening rib forms by the shank of shaft I-shape beam is outwardly-bent.

Owing to adopted above-mentioned technological scheme, the utility model compared with prior art, institute's acquisition of technology progress is:

Through stiffening rib being set in microcephaly and shaft transition position, strengthening the structure of fillet radius; Effectively strengthen the strength and stiffness of connecting rod; Reduce the stress of connecting rod small end and shaft transition position, improve the job security and the reliability of motor, help the light-weight design of motor; Prolong the working life of connecting rod, save cost.

The utility model is suitable for the motor connecting rod of making various vehicles.

The utility model below will combine Figure of description and specific embodiment to do further explain.

Description of drawings

Fig. 1 is the utility model embodiment's an integrally-built plan view;

Fig. 2 be embodiment illustrated in fig. 1 in the microcephaly and with the structural representation of shaft joint;

Fig. 3 is the side view of Fig. 2;

Fig. 4 be available engine connecting rod product the microcephaly and with the structural representation of shaft joint;

Fig. 5 is the side view of Fig. 4.

Among the figure: 1-microcephaly, 2-shaft, 3-major part, 4-stiffening rib, 5-fillet.

Embodiment

Embodiment 1

Shown in Figure 1 is a kind of engine link, comprises microcephaly 1, shaft 2 and major part 3.

As shown in Figure 2, microcephaly 1 is provided with stiffening rib 4 with shaft 2 transition positions.The bearing of trend of stiffening rib 4 is to microcephaly's direction, by outwardly-bent the forming of shank of shaft 2 I-shape beams from major part 1.

Stiffening rib 4 respectively has two places in the two sides, front and back of this engine link, and setting and the general structure of the two are the W type between two place's bilateral symmetry of each face.

Microcephaly 1 is the long radius round-corner transition with shaft 2 joints, and the radius of fillet is 5～15mm.

Claims

1. an engine link comprises microcephaly, shaft and major part, It is characterized in that:Microcephaly and shaft transition position are provided with the stiffening rib that extends to microcephaly's direction from major part.

2. engine link according to claim 1, It is characterized in that:Said stiffening rib respectively has two places in the two sides, front and back, is symmetrical set between every two places and the general structure of the two is the W type.

3. engine link according to claim 1, It is characterized in that:Said microcephaly and shaft joint are round-corner transition, and the semidiameter of fillet is 5～15mm.