CN204984516U

CN204984516U - Assembled camshaft

Info

Publication number: CN204984516U
Application number: CN201520716876.6U
Authority: CN
Inventors: 马霖; 董万清; 单澜; 廖君
Original assignee: TAIZHOU JIAOJIANG XINKE PRECISION MACHINERY Co Ltd
Current assignee: Zhejiang Xin can Pml Precision Mechanism Ltd
Priority date: 2015-09-16
Filing date: 2015-09-16
Publication date: 2016-01-20
Anticipated expiration: 2025-09-16

Abstract

The utility model belongs to the technical field of machinery and specifically relates to indicate an assembled camshaft. An assembled camshaft, includes steel pipe and the cam piece of cover on the steel pipe, and head end axle journal in right time is installed to the one end of steel pipe, and the head end axle journal adopted interference connection pressure equipment in the steel pipe right time, and head end axle journal terminal surface was equipped with side keyway and four axial oil duct holes of the variable device in right time of installation right time, and head end journal center had axially extending bore right time, processed the oilhole that has with the axially extending bore intercommunication on the excircle. Cam piece and thrust cam for the piece wearability and hardenability be superior to that the powder metallurgical material of cold shock cast iron makes, cam axostylus axostyle body by right time head end axle journal and bearing journal form: the head end axle journal adopted 45 numbers high -quality carbon elements right time, and the bearing journal adopts 35 numbers hollow steel pipes of high -quality carbon steel.

Description

A kind of assembled camshaft

Technical field

The utility model relates to mechanical field, refers in particular to a kind of assembled camshaft.

Background technique

At present, comparatively advanced motor car engine mostly adopts the camshaft of variable timing, this camshaft all adopts integrated type cold shock forging type, the shortcoming of this camshaft is: manufacturing enterprise is highly energy-consuming, high pollution foundry enterprise, and the product produced easily produces pore, sand holes, the casting defect such as loose, and the intensity of camshaft is not high, easily fracture is produced in using process, the hardness of cam after cold shock only has HRC45-50, and wear resistance is low, and camshaft is short for working life.

Summary of the invention

Low in order to overcome integrated type Chilled Cast Iron Camshaft intensity, cam cold shock hardness is low, and the shortcoming such as camshaft fracture, wearing and tearing caused, the utility model provides a kind of assembled camshaft.

A kind of assembled camshaft, comprise steel pipe and be enclosed within the cam bit on steel pipe, one end of steel pipe is provided with timing head end axle journal, timing head end axle journal adopts interference connection to be fitted in steel pipe, timing head end axle journal end face is provided with the side keyway and four axial oil channel holes of installing variable timing device, there is axial hole in timing head end journal centre, cylindrical is processed with the oilhole be communicated with axial hole.

Preferably, the described steel pipe the other end overlaps successively and has thrust cam bit, signal panel and steel ball, and steel ball is stopped at end and plays plug effect, and described steel ball interference extrusion in endoporus is fastening, and thrust cam bit and signal panel are fixed on steel pipe.

Preferably, described timing head end axle journal system adopts No. 45 Fine Steel Casting irons to make; Steel pipe adopts No. 35 Fine Steel Casting irons to make; Cam bit, thrust cam bit and signal panel system adopt powder metallurgy manufacture.

Preferred, described cam bit and thrust cam bit hardness after high frequency hardening reach HRC58-65.

The utility model: camshaft is made up of multiple part by use feature; Cam bit, thrust cam bit, signal panel are enclosed within steel pipe, steel ball internal expanding steel pipe is adopted to make steel pipe and cam bit, thrust cam bit, signal panel form keyed interference fit joint, steel ball is stopped at steel tube end part and plays plug effect, again timing head end axle journal is loaded in steel pipe with interference fit, namely become an assembled camshaft.The powdered metallurgical material that cam bit and thrust cam bit wear resistance and hardenability are better than chilled cast iron is made; Camshaft shaft is made up of timing head end axle journal and bearing journal: timing head end axle journal adopts No. 45 high-quality carbon elements, and bearing journal adopts No. 35 Fine Steel Casting iron hollow steel pipes.

The utility model adopts assembled camshaft, according to the handling characteristics at each position of camshaft, the utility model has the advantages that:

1. employ No. 35 Fine Steel Casting iron steel pipes higher than chilled cast iron intensity, the powdered metallurgical material that wear resistance is good with quenching Performance Ratio chilled cast iron, its quenching hardness can reach HRC58-65, the intensity of combined camshaft and wear resistance are obviously better than integrated type Chilled Cast Iron Camshaft, overcome due to the low shortcoming worn no resistance of hardness after cam cold shock.

2. whole axle adopts intensity higher than No. 35 Fine Steel Casting iron hollow steel pipes of cast iron, improves the bulk strength of camshaft, overcomes the shortcoming of camshaft in use easy-rupturing; Hollow steel pipe makes whole camshaft weight saving, decreases cam axle inertia, thus reduces motor energy consumption, better accomplishes energy-saving and emission-reduction.

3. timing head end axle journal adopts No. 45 Fine Steel Casting irons, its intensity is far away higher than cast iron, overcome when with M12x1.25 bolt variable timing device being assemblied in camshaft timing head end axle journal, timing head end axle journal cylindrical due under the pretightening force effect of bolt produce distortion and make advance/retard mechanism and timing head end axle journal stuck, the shortcoming that advance/retard mechanism lost efficacy, improves the reliability of the function of whole motor.

4. operation is few, and cost is low, and technique is advanced, has abandoned the casting technique mode of highly energy-consuming, high pollution, has decreased energy consumption, decreased the pollution to environment.

5. make flexible and changeable, transition is fast, can adapt to and meet the market demand of multi items, small lot, also be conducive to the improvement of gas distribution phase of engine.

Accompanying drawing explanation

Fig. 1 is the utility model decomposition texture schematic diagram.

Fig. 2 is the utility model structural representation.

Fig. 3 is the structural representation of the utility model timing head end axle journal.

Fig. 4 is the axial perspective structural representation of the utility model timing head end axle journal.

Fig. 5 is the A-A sectional drawing of Fig. 4.

Fig. 6 is the B-B sectional drawing of Fig. 4.

Fig. 7 is the C-C sectional drawing of Fig. 4.

In accompanying drawing: 1 is timing head end axle journal, and 2 is cam bits, and 3 is thrust cam bits, and 4 is signal panel, and 5 is steel balls, and 6 is steel pipes.

Embodiment

A kind of assembled camshaft, the cam bit 2 comprising steel pipe 6 and be enclosed within steel pipe 6, one end of steel pipe 6 is provided with timing head end axle journal 1, timing head end axle journal 1 adopts interference connection to be fitted in steel pipe 6, timing head end axle journal 6 end face is provided with side keyway 1-1 and four the axial oil channel hole 1-2 installing variable timing device, there is axial hole 1-3 at timing head end axle journal 1 center, cylindrical is processed with the oilhole 1-4 be communicated with axial hole 1-3.

Assembling method:

Cam bit 2, thrust cam bit 3, signal panel 4 are enclosed within steel pipe 6, be placed in assembling and positioning mould, expand with steel ball 5 pairs of steel pipe 6 endoporus, steel pipe 6 is made to produce plastic deformation and cam bit 2 endoporus, thrust cam bit 3 endoporus, signal panel 4 endoporus form keyed interference fit joint, plug effect is directly played after steel ball 5 puts in place, again timing head end axle journal 1 is loaded in steel pipe 6 with interference fit, namely become an assembled camshaft.

Claims

1. an assembled camshaft, comprise steel pipe and be enclosed within the cam bit on steel pipe, it is characterized in that: one end of steel pipe is provided with timing head end axle journal, timing head end axle journal adopts interference connection to be fitted in steel pipe, timing head end axle journal end face is provided with the side keyway and four axial oil channel holes of installing variable timing device, there is axial hole in timing head end journal centre, cylindrical is processed with the oilhole be communicated with axial hole.

2. assembled camshaft according to claim 1, it is characterized in that: the steel pipe the other end overlaps successively thrust cam bit, signal panel and steel ball, steel ball is stopped at end and plays plug effect, and described steel ball interference extrusion in endoporus is fastening, and thrust cam bit and signal panel are fixed on steel pipe.

3. assembled camshaft according to claim 1, is characterized in that: described timing head end axle journal system adopts No. 45 Fine Steel Casting irons to make; Steel pipe adopts No. 35 Fine Steel Casting irons to make; Cam bit, thrust cam bit and signal panel system adopt powder metallurgy manufacture.

4. assembled camshaft according to claim 3, is characterized in that: described cam bit and thrust cam bit hardness after high frequency hardening reach HRC58-65.