CN201218269Y - Crankshaft of medium and small power diesel engine - Google Patents

Abstract

The utility model relates to a low and medium power diesel engine crankshaft. In order to satisfy the demand of a low and medium power diesel motor of passenger cars, the crankshaft is of an integral linear four-cylinder and full support type, the diameter of the main journal of the crankshaft is phi 60 +/-0.5 mm, the width of the main journal of the crankshaft is 28+/-0.5 mm, the diameter of a connecting rod journal is phi 50+/-0.5 mm, and the width is 28 +/- 0.5 mm; and the semidiameter of the transition fillet of the main journal of the crankshaft and the connecting rod journal of the crankshaft is R1.3+/-0.3 mm. The utility model has the advantages that the crankshaft can be used for a low and medium power diesel motor of passenger cars below 100 kW and the crankshaft has compact structure and bigger intensity potential.

Description

The medium and small power diesel engine bent axle

Technical field

The utility model relates to diesel engine part, exactly is crankshaft of diesel engine.

Background technique

Bent axle is made up of one or more crank throws.Each crank throw then is made up of crank arm, main journal and rod journal three parts.Crankshaft rear end is equipped with flywheel, and in order to drive other mechanical rotation: crankshaft front end drives the assisting agency of motor itself by corresponding driving mechanism.

Bent axle be most important in the motor, carry one of complicated parts.Bent axle should have enough intensity, to prevent fatigue ruption under the compression and reciprocal and rotating inertia force stretching action of cylinder pressure.

1.9L the crank shaft blank of charge inter cooling diesel engine adopts the Alloy Constructional Steel die-forging forming, forging palpus normalizing quenching with Subsequent tempering and shot blast, and main journal, rod journal and bent axle Rear oil seal face must be handled through high frequency hardening.The roll extrusion fillet that all main journals of bent axle and rod journal place adopt reduces the degree that stress is concentrated, and improves Crankshaft Fatigue Strength.

Summary of the invention

In order to satisfy the requirement of passenger car middle low power diesel engine, the utility model provides a kind of integrated type forged steel medium and small power diesel engine bent axle.

Concrete structural design scheme is as follows:

The medium and small power diesel engine bent axle is whole in-line four cylinder, full supporting form bent axle, comprises four crank throws, and each crank throw is made up of crank arm, main journal and rod journal three parts, and wherein crank arm is connecting crankshaft counter balance;

Described crankshaft main journal diameter is φ 60 ± 0.5mm, and width is 28 ± 0.5mm, and the rod journal diameter is φ 50 ± 0.5mm, and width is 28 ± 0.5mm;

Described crankshaft counter balance width is 142 ± 0.5mm, and arm is thick to be 20 ± 0.5mm, and wherein the 8th equilibrium block radius is R72 ± 0.5mm, and all the other equilibrium block radiuses are R76 ± 0.5mm;

The fillet radius of described crankshaft main journal and rod journal knuckle is R1.3 ± 0.3mm.

Useful technique effect of the present utility model: can be used for the following passenger car middle low power diesel engine of 100kW, this bent axle has bigger intensity potentiality, the crankshaft main journal diameter is φ 60 ± 0.5mm, width is 28 ± 0.5mm, the rod journal diameter is φ 50 ± 0.5mm, width is 28 ± 0.5mm, has guaranteed the structural compactness of this bent axle.

Description of drawings

Fig. 1 is the vertical view of the utility model,

Fig. 2 is the A-A sectional view of Fig. 1,

Fig. 3 is the B-B sectional view of Fig. 1,

Fig. 4 is the knuckle enlarged view.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

Embodiment:

Referring to Fig. 1, Fig. 2 and Fig. 3,1.9L the bent axle of charge inter cooling diesel engine, its form are whole in-line four cylinder, full supporting structure, comprise four crank throws, each crank throw is made up of crank arm, main journal and rod journal three parts, and wherein crank arm is connecting crankshaft counter balance;

The crankshaft main journal diameter is φ 60 ± 0.5mm, and width is 28 ± 0.5mm, and the rod journal diameter is φ 50 ± 0.5mm, and width is 28 ± 0.5mm.

The fillet radius of all crankshaft main journals and rod journal knuckle is R1.3 ± 0.3mm, improves Crankshaft Fatigue Strength, as shown in Figure 4.

The crankshaft counter balance width is 142 ± 0.5mm, and arm is thick to be 20 ± 0.5mm, and wherein the 8th equilibrium block radius is R72 ± 0.5mm, and all the other equilibrium block radiuses are R76 ± 0.5mm;

Crank shaft blank adopts the Alloy Constructional Steel die-forging forming, forging palpus normalizing quenching with Subsequent tempering and shot blast, and main journal, rod journal and bent axle Rear oil seal face must be handled through high frequency hardening.The roll extrusion fillet that all main journals of bent axle and rod journal place adopt reduces the degree that stress is concentrated, and improves Crankshaft Fatigue Strength.

Claims (1)

1, medium and small power diesel engine bent axle for whole in-line four cylinder, full supporting form bent axle, comprises four crank throws, and each crank throw is made up of crank arm, main journal and rod journal three parts, and wherein crank arm is connecting crankshaft counter balance, it is characterized in that:

Described crankshaft main journal diameter is φ 60 ± 0.5mm, and width is 28 ± 0.5mm, and the rod journal diameter is φ 50 ± 0.5mm, and width is 28 ± 0.5mm;

Described crankshaft counter balance width is 142 ± 0.5mm, and arm is thick to be 20 ± 0.5mm, and wherein the 8th equilibrium block radius is R72 ± 0.5mm, and all the other equilibrium block radiuses are R76 ± 0.5mm;

The fillet radius of described crankshaft main journal and rod journal knuckle is R1.3 ± 0.3mm.

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