CN201258906Y

CN201258906Y - Ultralight crankshaft

Info

Publication number: CN201258906Y
Application number: CNU2008201907340U
Authority: CN
Inventors: 王锦焱; 姬传斌
Original assignee: Huanyu Automobile Components And Parts Co Ltd Jingzhou
Current assignee: Huanyu Automobile Components And Parts Co Ltd Jingzhou
Priority date: 2008-09-11
Filing date: 2008-09-11
Publication date: 2009-06-17
Anticipated expiration: 2018-09-11

Abstract

The utility model relates to a super-light crankshaft, belongs to the technical field of the internal combustion engine. The utility model comprises a main journal, a rod journal, a shaft shoulder and a balance iron. The main journal of the crankshaft is provided with a quincunx flange. The center of the main journal is provided with a center hollow hole. The core part of the rod journal is provided with a butt-type lightening hole. The shaft shoulder is provided with a large R-shaped lightening curved surface. The lateral side of the balance iron is provided with a ring shaped lightening trough. Under the premise of not reducing the service performance of the crankshaft, the self-weight of the crankshaft can be reduced to the macimum range. The target of improving the overall efficiency of the power mechanism and reducing the weight of the entire machine can be achieved. The super-light crankshaft changes the design of the traditional crankshaft. The rigidity and the capacity of the anti-torsional vibration of the crankshaft are increased after the structure is improved. The effect of energy saving and environmental protection is achieved. The super-light crankshaft is in particular suitable for engines which have strict requirement for entire machine weight, such as senior racing car, high speed yacht, light aircraft and so on.

Description

The surperlight type bent axle

Technical field:

The utility model relates to a kind of surperlight type bent axle, belongs to the internal combustion engine part technical field.

Background technique:

Steel part material bent axle is all kinds of high-performance enginers, all kinds of to-and-fro motion and the kernel component of the high-performance mechanism of conversion mutually that rotatablely moves.But for the mechanism of some overcritical complete machine weight, as the steel part bent axle of used motors such as senior racing car, speedboat, baby plane, the optimization of weight is particularly important.Mechanism efficiency is obviously improved, and consumption declines to a great extent, and resource occupation and pollution reduce, and can also reach effects efficient, energy-saving and environmental protection simultaneously.Domestic have manufacturer once to adopt optimizing design scheme in the casting crankshaft field, its crankshaft material adopts spheroidal graphite cast iron or high-duty malleable cast iron, utilize the flowability of high temperature liquid iron, crankshaft casting is become the hollow pattern of main journal and rod journal, but the main purpose of this optimizing design scheme is in order to reduce the inner defective of casting, is not the optimization for weight.For forged steel crankshaft, owing to can not forge complicated crank forging like this, the Weight-optimised method that does not influence bent axle performance excess metal is removed in order to alleviate bent axle weight by the at present domestic manufacturer that finds no.

Summary of the invention:

The purpose of this utility model is: provide a kind of under the prerequisite that does not reduce the bent axle usability, maximum magnitude alleviate the bent axle own wt, improve the surperlight type bent axle that complete machine weight reduces to reach the power mechanism overall efficiency.

The utility model is to realize above-mentioned purpose by the following technical solutions:

This surperlight type bent axle is made of main journal, rod journal, the shaft shoulder and balance iron, it is characterized in that: be shaped on quincunx flange on the described main journal, the main journal center is shaped on hollow hole of centre; Be shaped on the dock lightening hole on the rod journal core; Be shaped on big R shape loss of weight curved surface on the shaft shoulder; The balance iron outside of main journal and rod journal bi-side is shaped on annular loss of weight groove, and balance iron front end and back end is shaped on streamline balance tail.

The utility model beneficial effect compared with prior art is:

After this surperlight type bent axle adopts the technique scheme optimal design, the surperlight type bent axle of making except that weight saving about 1/4th, also has other multinomial optimization effect: 1,, the bearing centrifugal force load of rod journal position centrifugal force and main journal is reduced greatly owing to alleviated rod journal and shaft shoulder weight.2, main journal and rod journal adopt the hollow type structure, have increased the rigidity of bent axle and the ability of opposing torsional vibration, have reduced the extensional vibration of bent axle, and the bearing capacity of bent axle and fatigue strength are significantly strengthened.3, its engine horsepower of bent axle installation back after form structure improves obviously strengthens, descend with specific fuel consumption, has played the effect of not only energy-conservation but also environmental protection, and the parent who is subjected to the racing car amateur especially looks at.

Description of drawings:

Fig. 1 is the structural representation of surperlight type bent axle;

Fig. 2 is the A-A view of surperlight type crankshaft counterbalance iron;

Fig. 3 is the B-B view of surperlight type crankshaft main journal.

Among the figure: 1, main journal, 2, rod journal, 3, the shaft shoulder, 4, balance iron, 5, quincunx flange, 6, hollow hole of centre, 7, the dock lightening hole, 8, big R shape loss of weight curved surface, 9, annular loss of weight groove, 10, streamline balance tail.

Embodiment:

This surperlight type bent axle is made of main journal 1, rod journal 2, the shaft shoulder 3 and balance iron 4, and its position relation each other is the same with existing bent axle with form structure, it is characterized in that:

The utility model is made quincunx flange 5 with the flange on the main journal 1, and hollow hole of centre 6 is made at the center of main journal 1, improves the integral rigidity of bent axle.

In addition,, also determined the shape and the weight of balancer weight, reduced its weight and can obviously alleviate integral shaft weight because the rod journal of bent axle and the weight of the shaft shoulder had both influenced the dynamic balancing situation.Therefore on the core of rod journal 2, be shaped on dock lightening hole 7, be shaped on big R shape loss of weight curved surface 8 on the shaft shoulder 3.

The balance iron 4 of bent axle is to be provided with for satisfying its dynamic balance performance that runs up in the crankshaft structure, and when bent axle rotated in cylinder body, balance iron 4 was with the long-pending oil in the high speed impact oil sump, and this moment, fluid also produced very big resistance to operating bent axle.Therefore the utility model is in the outside of the balance iron 4 of main journal 1 and rod journal 2 bi-side, adopt main journal 1 concentric circle and rod journal 2 concentric structure methods to remove respectively to the little metal of aequum influence, keep the outer balance weight of iron of outermost circle, be shaped on annular loss of weight groove 9 in the outside of balance iron 4, and balance iron front end and back end shape optimized with the streamline design proposal.Streamline balance tail 10 is made in the front end and back end of balance iron 4.

This surperlight type bent axle has changed traditional steel part material crankshaft designs, increased the annular loss of weight groove 9 of crankshaft main journal 1 and rod journal 2 bi-side balance iron, the rod journal 2 and the shaft shoulder 3 are shaped on the big R shape loss of weight curved surface 8 of loss of weight, rod journal 2 is shaped on the dock lightening hole 7 of loss of weight, the center of main journal 1 is shaped on the hollow hole of centre 6 and the flange of loss of weight and makes quincunx flange 5, increased the rigidity of bent axle and the ability of opposing torsional vibration after the architecture advances, the bearing capacity of bent axle and fatigue strength are significantly strengthened.Its engine horsepower of bent axle installation back obviously strengthens, and has played the effect of not only energy-conservation but also environmental protection, and the motor as senior racing car, speedboat, baby plane etc. that is specially adapted to some overcritical complete machine weight uses.

Claims

1, a kind of surperlight type bent axle, it is made of main journal (1), rod journal (2), the shaft shoulder (3) and balance iron (4), and it is characterized in that: be shaped on quincunx flange (5) on the described main journal (1), the center of main journal (1) is shaped on hollow hole of centre (6); Be shaped on dock lightening hole (7) on the core of rod journal (2); Be shaped on big R shape loss of weight curved surface (8) on the shaft shoulder (3); The outside of the balance iron (4) of main journal (1) and rod journal (2) bi-side is shaped on annular loss of weight groove (9), and balance iron (4) front end and back end is shaped on streamline balance tail (10).