CN202545543U

CN202545543U - Low-noise crankshaft of diesel engine

Info

Publication number: CN202545543U
Application number: CN2012201296502U
Authority: CN
Inventors: 吴恢栋; 陶泽民; 沈琼; 蔚兴建
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2012-03-30
Filing date: 2012-03-30
Publication date: 2012-11-21
Anticipated expiration: 2022-03-30

Abstract

The utility model discloses a low-noise crankshaft of a diesel engine. The low-noise crankshaft comprises at least two crank throws and a cam, wherein each crank throw is provided with a connecting rod shaft neck which is connected with a piston connecting rod; and the cam is arranged at the front end of the crankshaft. Preferably, the low-noise crankshaft comprises two crank throws, and an included angle of 90 degrees is formed between the two crank throws in the rotation direction of the crankshaft. The low-noise crankshaft of the diesel engine adopts a cam structure to replace a gear to drive a lubricating system and has the advantage of low noise.

Description

The low noise diesel machine crankshaft

Technical field

The utility model relates to a kind of crankshaft of diesel engine, relates in particular to a kind of low noise diesel machine crankshaft.

Background technique

Bent axle on the DENG is the parts that the to-and-fro motion of piston is converted into circular movement.On conventional diesel engine, the flywheel that bent axle often will be through being installed in its rear end and the vibration damper belt pulley and the gear of its front end drive gas distribution system, oil-fired system, lubrication system etc.Lubrication system wherein generally selects for use gear to drive; Such benefit is that transferring power is stable, flow equalization; But owing to will unavoidably produce being in contact with one another of the gear teeth gear-driven the time, therefore be easy to produce noise from the gear meshing position.

The model utility content

The utility model is in order to overcome above-mentioned defective of the prior art, provides a kind of and replaces the crankshaft of diesel engine of gear drive lubrication system with cam structure, has the advantage of low noise.

For realizing above-mentioned purpose, the openly following technological scheme of the utility model:

A kind of low noise diesel machine crankshaft comprises at least two crank throws, all has the rod journal that is connected with piston rod on each crank throw, also comprises the cam that is arranged on crankshaft front end.

Preferably, said crank throw is two, and the angle of these two crank throws on the sense of rotation of bent axle is 90 °.

Compared with prior art, the utlity model has following beneficial effect:

Replace gear to come drive plunger formula oil pump with cam; Can realize driving to lubricating system of diesel oil engine; Avoided unnecessary parts collision simultaneously, thereby can significantly reduce noise, in addition; Cam also has than the gear intensity of compact structure and Geng Gao more, helps to simplify the structure of bent axle, the life-span of improving bent axle.

Description of drawings

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

Fig. 2 is the H-H schematic cross-section among Fig. 1;

Fig. 3 is the J-J schematic cross-section among Fig. 1;

Fig. 4 is the K-K schematic cross-section among Fig. 1.

In conjunction with the accompanying drawing following reference character of mark above that:

1-first crank throw, 2-second crank throw, 3-rod journal, 4-cam.

Embodiment

Below in conjunction with accompanying drawing, the preferred embodiment of the utility model is described in detail, but the protection domain that is to be understood that the utility model does not receive the restriction of embodiment.

A kind of low noise diesel machine crankshaft, as shown in Figure 1, be included in first crank throw 1 and second crank throw 2 of the 90 ° of settings in space on the sense of rotation of bent axle, be provided with rod journal 3 on these two crank throws 1 and 2, be used for linking to each other with piston rod.The cross section of first crank throw 1 and second crank throw 2 is respectively shown in Fig. 2 and 3.During work, along with the straight reciprocating motion of piston, the crank throw 1 of these 90 ° of settings in two intervals and 2 can change into continuous rotating in a circumferential direction to the straight reciprocating motion of piston, makes bent axle produce power output.Be provided with a cam 4 at crankshaft front end (right side among Fig. 1), drive the plunger type lubrication oil pump in the lubricating system of diesel oil engine in order to replace original gear.Fig. 4 is the schematic cross-section of this cam 4.Because cam 4 can contact with the plunger on the plunger type lubrication oil pump in rotary course all the time, just avoided unnecessary parts collision, thereby can significantly reduce noise.In addition, cam 4 also has than the gear intensity of compact structure and Geng Gao more.

More than the disclosed more excellent specific embodiment that is merely the utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into the protection domain of the utility model.

Claims

1. a low noise diesel machine crankshaft is characterized in that, comprises at least two crank throws, all has the rod journal that is connected with piston rod on each crank throw, also comprises the cam that is arranged on crankshaft front end.

2. low noise diesel machine crankshaft according to claim 1 is characterized in that, said crank throw is two, and the angle of these two crank throws on the sense of rotation of bent axle is 90 °.