CN202165390U

CN202165390U - Engine cracking connecting bar with bush

Info

Publication number: CN202165390U
Application number: CN2011202855237U
Authority: CN
Inventors: 徐辉
Original assignee: Dongfeng Cummins Engine Co Ltd
Current assignee: Dongfeng Cummins Engine Co Ltd
Priority date: 2011-08-08
Filing date: 2011-08-08
Publication date: 2012-03-14
Anticipated expiration: 2021-08-08

Abstract

The utility model provides an engine cracking connecting bar with a bush, which comprises a connecting bar body as well as a big head hole and a small head hole at the two ends of the connecting bar body. A bush matched with the small head hole is arranged in the small head hole in an embedding way. A V-shaped lubricating oil groove penetrates through the coaxial direction of the inner wall of the bush. As an oil path hole longitudinally penetrating through the connecting bar body is communicated between the inner wall of the big head hole and the inner wall of the small head hole. The bush has a U-shaped hasp connecting structure, namely, one side of a connecting part of the bush bent by a metal plate is provided with a U-shaped depression and the other side is provided with a matched U-shaped hasp; moreover, the U-shaped depression and the U-shaped hasp are connected in an engaging way. After cracking, a big head end cover and the connecting bar body are connected by four dodecagonal bolts; and the two dodecagonal bolts at each side of the big head end cover are arranged along the coaxial direction in parallel. As the bush is arranged in the small head hole, the engine cracking connecting bar with the bush has excellent plasticity and toughness, so that the seizure resistance property of the engine cracking connecting bar with the bush when the bar is connected with a piston pin is greatly improved.

Description

A kind of motor of lined disconnection bar that rises

Technical field

The utility model belongs to technical field of automobile engine, the motor that the is specifically related to a kind of lined disconnection bar that rises.

Background technique

The rise big end hole of disconnection bar of motor is connected with crank-shaft link neck, and the microcephaly hole is connected with wrist pin.The effect of connecting rod is to give bent axle the propagation of pressure from wrist pin, drives crankshaft rotating, and then realizes the power output of motor, is the requisite vital part of combustion engine powered assembly.

The engine crankshaft disconnection bar that rises exists microcephaly hole and wrist pin the situation of killing often to occur, and problems such as the bite-resistant performance difference of connecting rod small end hole and wrist pin mainly are unlubricated causing between microcephaly hole and the wrist pin.The risk of disconnection bar microcephaly and wrist pin interlock because heavy duty diesel engine heat load height, urgent need reduction motor rise.

The big end hole of connecting rod is designed with the fractional fissure that rises, so that open when installing.But the disconnected process that rises can produce the underproof problem of face absolutely that rises, and rises and has no progeny, and the major part end cap is not ideal enough with being connected of connecting rod shank, exists the big end hole section junction of rising to have slight crack to influence problems such as smoothness, the instability that is connected of major part end cap and connecting rod shank.

Summary of the invention

The purpose of the utility model is in order to solve the bite-resistant performance of connecting rod small end hole and wrist pin, to improve the plasticity and the toughness problem in connecting rod small end hole, the motor that the designs a kind of lined disconnection bar that rises.

The technological scheme that the utility model adopted is following: the motor of the lined of the utility model disconnection bar that rises comprises the big end hole and the microcephaly hole at connecting rod shank, connecting rod shank two ends, and the lining of in the microcephaly hole, establishing with microcephaly hole coupling is embedded in the microcephaly hole.

Described V-type oil groove penetration liner inwall axially.

The motor of the described lined disconnection bar that rises is communicated with an oil channel hole that vertically runs through the connecting rod body of rod by big end hole inwall to microcephaly hole inwall, and the outlet of oil channel hole is arranged on lining.

Described lining is a U-shaped hasp linkage structure, i.e. the joint that bends by sheet metal of lining, Yi Bian the U-shaped notch is arranged, another side has the U-shaped hasp of coupling, and U-shaped notch and U-shaped hasp are connected.

The motor of the described lined disconnection bar that rises is had no progeny rising, and the bolt that the major part end cap is connected with the connecting rod body of rod adopts four bihexagonal head screws to connect, and in the both sides of major part end cap, two bihexagonal head screws of every side are arranged side by side vertically.

The advantage of the utility model is following:

1) in the microcephaly hole, establish lining, lining adopts Cu alloy material to make, and has superior plasticity and toughness, and the bite-resistant performance that makes it when being connected with wrist pin improves greatly.

2) motor that relates to of the utility model disconnection bar that rises under the enough situation of connecting rod Fatigue Strength Analysis, increases an oil channel hole that runs through from crank pin end pore to microcephaly hole; Transfer to crank pin end pore to machine oil through the oil channel hole on the bent axle from the motor main oil gallery; Mode through pressure lubrication transfers to the connecting rod small end hole to machine oil from crank pin end pore again, and the lining of establishing the band V-type oil groove that matees with the microcephaly hole is embedded in the microcephaly hole, is more conducive to oil storage in the V-type lubrication groove; Guarantee oil slick thickness; Improve the lubricated of connecting rod small end hole, thereby reached the purpose that the lube pistons pin connects with connecting rod small end, reduced the risk that connecting rod small end hole and wrist pin are killed.

2) the major part end cap of the utility model adopts four bihexagonal head screws and the connecting rod body of rod to tighten, make be fitted to each other again after the big end hole cracking stable, the circularity of big end hole after the reliability that has guaranteed assembling and the assembling.

3) through finite element analysis and series calculation, virtual assembling is connected with interference checking, structural stress analysis, bolt to analyze etc. all to be passed through, and adopts the design of V-type oil groove, all meets the demands through simulation analysis demonstration oil film distribution and oil pressure, thinks feasible.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the longitudinal sectional view of the utility model.

Fig. 3 is the structural representation of the lining of the utility model.

Specific embodiments

Below in conjunction with embodiment the utility model is further described.

Like Fig. 1, Fig. 2: the motor of the lined of the utility model disconnection bar that rises comprises the big end hole 2 and the microcephaly hole 3 at the connecting rod body of rod 1, the connecting rod body of rod 1 two ends; Precrack 6 on big end hole 2 is characterized in that: in microcephaly hole 3, establish the lining 3a that matees with microcephaly hole 3 and be embedded in the microcephaly hole 3.

Establish the V-type oil groove at lining 3a inwall, V-type oil groove 7 penetration liner 3a inwalls axially.

In the microcephaly hole, establish lining, lining adopts Cu alloy material to make, and has superior plasticity and toughness, and the bite-resistant performance that makes it when being connected with wrist pin improves greatly.

Fig. 3 is the structural representation of the lining of the utility model:

Lining 3a is a U-shaped hasp linkage structure, and 3a1 is a hasp.Because lining 3a is by the sheet metal bending forming, on one side there is the U-shaped notch joint, another side has the U-shaped hasp of coupling; U-shaped notch and U-shaped hasp are connected; This structure makes junction surface more smooth, and bending forming back bush jointing does not have convexity, has reduced lining and has been connected the risk of killing with pin.

Like Fig. 1, Fig. 2: have no progeny rising, the bolt 5 that major part end cap 2a is connected with the connecting rod body of rod 1 adopts four bihexagonal head screws to connect, and in the both sides of major part end cap 2a, two bihexagonal head screws of every side are arranged side by side vertically.The major part end cap adopts four bihexagonal head screws and the connecting rod body of rod to tighten, and makes the big end hole section combination of rising reliable and stable, has reduced big end hole hole wall cracks step, has improved the circularity in hole.

Be communicated with an oil channel hole 4 that vertically runs through the connecting rod body of rod 1 by big end hole 2 inwalls to microcephaly hole 3 inwalls, the outlet 4a of oil channel hole 4 is arranged on lining 3a.Oil channel hole 4 transfers to crank pin end pore 2 to the machine oil from the motor main oil gallery through the oil channel hole on the bent axle; Mode through pressure lubrication is from crank pin end pore 2 again; Transfer to connecting rod small end hole 3 to machine oil through oil channel hole 4, and stay in the V-type lubrication groove 7, improved the lubricated of connecting rod small end hole 3; Thereby reach lubricated pin purpose of connecting, reduce the risk that connecting rod small end hole and wrist pin are killed.

The utility model is established the laser disconnected groove 8 that rises at precrack 6 places of big end hole 2, making rises, and the rise when disconnected quality of section is guaranteed, and has improved the disconnection bar up-to-standard rate that rises.

Claims

1. the motor of the lined disconnection bar that rises; The big end hole (2) and microcephaly hole (3) that comprise the connecting rod body of rod (1), the connecting rod body of rod (1) two ends; Precrack (6) on big end hole (2) is characterized in that: in microcephaly hole (3), establish the lining (3a) that matees with microcephaly hole (3) and be embedded in the microcephaly hole (3).

2. the motor of the lined according to claim 1 disconnection bar that rises is characterized in that: establish V-type oil groove (7) at described lining (3a) inwall, V-type oil groove (7) penetration liner (3a) inwall axially.

3. the motor of the lined according to claim 1 and 2 disconnection bar that rises; It is characterized in that: be communicated with an oil channel hole (4) that vertically runs through the connecting rod body of rod (1) by big end hole (2) inwall to microcephaly hole (3) inwall, the outlet (4a) of oil channel hole (4) is arranged on lining (3a).

4. the motor of the lined according to claim 1 and 2 disconnection bar that rises; It is characterized in that: lining (3a) is for U-shaped hasp linkage structure, i.e. the joint that bent by sheet metal of lining (3a) is Yi Bian there is the U-shaped notch; Another side has the U-shaped hasp of coupling, and U-shaped notch and U-shaped hasp are connected.

5. the motor of the lined according to claim 1 and 2 disconnection bar that rises; It is characterized in that: have no progeny rising; The bolt (5) that major part end cap (2a) is connected with the connecting rod body of rod (1) side adopts four bihexagonal head screws to connect; In the both sides of major part end cap (2a), two bihexagonal head screws of every side are arranged side by side vertically.