CN203348301U - Double-angle small-head connecting rod - Google Patents

Abstract

The utility model relates to the technical field of engines, in particular to a double-angle small-head connecting rod. The double-angle small-head connecting rod comprises a small head, a rod body and a large head, wherein a bushing is embedded and casted in a hole in the small head; an oil through hole is formed in the bushing; the side surface of the small head comprises an upper wedge-shaped structure and a lower wedge-shaped structure; the upper wedge-shaped structure and the lower wedge-shaped structure form the whole wedge-shaped structure; a wedge-shaped angle of the upper wedge-shaped structure is smaller than an angle of the lower wedge-shaped structure; and the bushing is a bronze bushing made of a bronze material. According to the double-angle small-head connecting rod, by the aid of the structure, the upper end of the small head can be guaranteed to have enough width under the premise that the width of the lower end of the small head of the connecting rod is guaranteed to be constant, that is, the bearing capacity is constant, the breakage probability of the upper end of the small head is reduced, and the normal use of the connecting rod is guaranteed.

Description

Two angle small end con rods

Technical field

The utility model relates to technical field of engines, is specifically related to a kind of engine link.

Background technique

The piston rod group is the driving component of motor, and it passes to bent axle to the pressure of combustion gas, makes crankshaft rotating outputting power.The piston rod group mainly is comprised of piston, piston ring, wrist pin and piston rod etc.

The function of piston rod is that the power that piston is born is passed to bent axle, thereby makes the to-and-fro motion of piston be transformed into rotatablely moving of bent axle.Piston rod bears the active force that wrist pin transmits and itself swings and the inertial force during to-and-fro motion of piston group, and the size and Orientation of these power is all periodically variable, therefore, piston rod is subject to is compression, draw high and bending etc. than side load.

Piston rod generally is comprised of microcephaly, shaft and major part three parts.Wherein, the microcephaly of piston rod is connected with wrist pin, and relative movement is arranged during work and between pin.As shown in Figure 1, traditional wedge plungers connecting rod comprises microcephaly 1, shaft 2 and major part (not shown), wherein, and the wedge-shaped structure that microcephaly 1 is integral type, the width of upper end is less than the width of lower end, and the angle between the hypotenuse of its longitudinal section and connecting rod shaft axis is β.In order to improve microcephaly 1 bearing capacity, will guarantee the width b of connecting rod small end 1 bottom, strengthen angle beta, corresponding, the width a of microcephaly 1 upper end will reduce.As β > 14 ° times, width a will be less than allowable value, and the danger of fracture herein will obviously increase.And if to guarantee the width a of microcephaly 1 upper end, certainly will to reduce microcephaly 1 width b, now, will make microcephaly 1 bearing capacity be affected.

The model utility content

The purpose of this utility model is to provide a kind of pair of angle small end con rod, solves above technical problem.

The technical problem that the utility model solves can realize by the following technical solutions:

A kind of pair of angle small end con rod, comprise microcephaly, shaft and major part, it is characterized in that: in described microcephaly's hole, castingin has lining, and described lining is provided with oil through.

Described microcephaly side is by the upper wedge structure, and lower wedge mechanism, the whole wedge-shaped structure that two-part form, and the wedge angle of described upper wedge structure is less than the angle of described lower wedge structure.

Described lining is the bronze bushing that bronze material is made.

Described microcephaly is the wedge-shaped structure consisted of upper and lower two-part, accordingly, the hypotenuse of its longitudinal section comprises upper and lower two sections, wherein, angle between the shaft axis of epimere hypotenuse and connecting rod is the first angle, and the angle between the shaft axis of hypomere hypotenuse and connecting rod is the second angle.The first angle angle is less than the second angle angle.

Say further, described the first angle and described the second angle are two separate angles.In design, their angular dimension can carry out respectively design modifying.

Beneficial effect: compared with prior art, microcephaly of the present utility model is the wedge-shaped structure consisted of upper and lower two-part, accordingly, the hypotenuse of its longitudinal section comprises upper and lower two sections, wherein, the second angle between the first angle between the shaft axis of epimere hypotenuse and connecting rod and the shaft axis of hypomere hypotenuse and connecting rod is separate, and their angular dimension can be adjusted respectively.This structural design of the present utility model can also can guarantee that there are enough width microcephaly's upper end under the prerequisite of the width constant (being that bearing capacity is constant) that guarantees the connecting rod small end lower end, reduces the probability of microcephaly upper end fracture, guarantees the normal use of connecting rod.

The accompanying drawing explanation

Fig. 1 is the structural representation of the two angle small end con rods of traditional wedge shape;

Fig. 2 is the structural representation of described in the utility model pair of angle small end con rod;

Fig. 3 is the A-A view of Fig. 2.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose with effect is easy to understand, below in conjunction with the further elaboration the utility model of concrete diagram.

With reference to Fig. 2, Fig. 3, a kind of pair of angle small end con rod, comprise microcephaly 1, shaft 2 and major part, and in microcephaly 1 hole, castingin has lining 3, and lining 3 is provided with oil through.Microcephaly 1 side is by the upper wedge structure, and lower wedge mechanism, the whole wedge-shaped structure that two-part form, and the wedge angle of upper wedge structure is less than the angle of lower wedge structure.The bronze bushing 3 that lining 3 is made for bronze material.

Microcephaly 1 is the wedge-shaped structure consisted of upper and lower two-part, accordingly, the hypotenuse of its longitudinal section comprises upper and lower two sections, wherein, angle between the shaft axis of epimere hypotenuse 11 and connecting rod is the first angle α, and the angle between the shaft axis of hypomere hypotenuse 12 and connecting rod is the second angle β.The first angle α angle is less than the second angle β angle.Say further, the first angle α and the second angle β are two separate angles.In design, their angular dimension can carry out respectively design modifying.

Above-mentioned this structural design can also can guarantee that there are enough width microcephaly's upper end under the prerequisite of the width constant (being that bearing capacity is constant) that guarantees the connecting rod small end lower end, reduces the probability of microcephaly upper end fracture, guarantees the normal use of connecting rod.

Above demonstration and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (2)

1. a two angle small end con rod, comprise microcephaly, shaft and major part, and it is characterized in that: in described microcephaly's hole, castingin has lining, and described lining is provided with oil through;

Described microcephaly side is by the upper wedge structure, and lower wedge mechanism, the whole wedge-shaped structure that two-part form, and the wedge angle of described upper wedge structure is less than the angle of described lower wedge structure.

2. according to claim 1 pair of angle small end con rod, is characterized in that: the bronze bushing that described lining is the bronze material making.

Images