CN2667242Y

CN2667242Y - Magnesium alloy speed variator box body for engine

Info

Publication number: CN2667242Y
Application number: CNU2003201149379U
Authority: CN
Inventors: 杨成君; 汪洋; 杨显荣
Original assignee: Changan Automobile Group Co Ltd
Current assignee: Chongqing Changan Industry Group Co Ltd
Priority date: 2003-10-24
Filing date: 2003-10-24
Publication date: 2004-12-29
Anticipated expiration: 2013-10-24

Abstract

The utility model discloses a magnesium alloy gear box for an engine, and comprises an upper box, a lower box and an extended box, wherein, a rib of 5mm thickness is added between prior two ribs at a bearing hole Phi 58 on the small end face of the lower box; a rib of 5mm is additionally arranged at one side of a big end face of lower box where is provided with a starting engine; and the connective chamfer R of box face is increased at the cylinder bottom of outer arc R12 at the place of the upper box where a stud bolt is arranged. The design reinforces the weak position of the magnesium alloy gear box, improves notably the distribution performance of intensity and lowers the maximum exciting force, and can effectively avoid the fatigue and the damage occurring in production and has good integrity of box, and the box can adopt the prior aluminum alloy production equipment and working piece to manufacture and assembly, and the design of the cavity of the model has no large change, thus larger equipment input can be avoided.

Description

A kind of motor magnesium alloy for cabinet of speed changer

Technical field

The utility model belongs to new material application technology and engine speed changer manufacturing technology field, is specifically related to a kind of motor magnesium alloy for cabinet of speed changer new structure at the F Engine Series.

Background technique

The upper box of engine speed changer and lower box are the motor car engine parts that a kind of stressing conditions complexity, combination property are had relatively high expectations.In car at home and abroad, the little car, particularly domestic, generally all adopt aluminum alloy as raw material.Reducing energy consumption, improve energy utilization rate, reduce environmental pollution and save earth resource more urgent today, magnesium alloy is because of its low density, with aluminum alloy approaching specific strength, specific rigidity are arranged, damping and amortization is good, and vibration damping is good, characteristics such as electromagnetic wave shielding is good and more and more be subjected to the attention of countries in the world, being described as 21 century is imbued with " green material " of development and application most.Magnesium alloy materials is used on the mission case, can alleviate the weight of car load, reduces fuel consumption per hundred kilometers, energy saving, exhaust emissions more clean, environmental protection, simultaneously to reducing the noise of motor, strengthening vibration damping also has effect preferably, has at home and abroad all begun in recent years to adopt.But the structure of existing magnesium alloy for cabinet of speed changer all is the structure of the primary aluminum alloy casing continued to use, after its material changes magnesium alloy into by aluminum alloy, the local area insufficient strength can appear in housing structure, uses to occur fatigue damage, the exciting force performance issues such as great disparity that distribute too after a period of time prematurely.As in assembling and using process, be prone in the place that upper box is adorned stud and break; Because starting electrical machinery has bigger moment when work, often cause the local damaged of upper box dress starting electrical machinery; Because the skewness of exciting force, the damage phenomenon of φ 58 bearing holes once appearred carrying out mountain road examination (when travel in the mountain area, put in the first speed mostly, this moment, exciting force distributed the most uneven), influence the quality of car load when serious.

Summary of the invention

Make the problems referred to above that mission case structurally exists at magnesium alloy substitution of Al alloy, the purpose of this utility model is the motor magnesium alloy for cabinet of speed changer at the F Engine Series that proposes a kind of new structure, be to satisfy mission case in the installation on the car load and not influencing under the prerequisite of existing processing, set assembling technology, remedy the intensity of former magnesium alloy for cabinet of speed changer local area, its intensity level, exciting force are evenly distributed.

Technical solution of the present utility model mainly is to set up stiffening rib in the appropriate location of former housing structure: the one, at lower box small end face upper bearing (metal) hole φ 58 places, between former two stiffening ribs, increase the thick stiffening rib of 5mm, so both satisfied requirement of strength, there is the strength difference that makes three main basal seat areas in the casing to reduce, it is decentralized that intensity distriubtion is tending towards, have intensity distriubtion performance preferably, and such design to original processing, assembly technology all less than the influence.In addition, set up the stiffening rib of a 5mm at upper box large end face one side dress starting electrical machinery place, kept being connected preferably, have stronger unified sense with the stiffening rib of former casing.The upper box dress stud external arc R12 of place cylinder bottom strengthen with the casing face be connected chamfering R, can strengthen the join strength of this circular arc cylinder and box outer surface like this, thereby avoid the splintering problem of casing appearance in assembling, use effectively.

This structure is also further being improved with upper/lower positions: the one, on big end one side external surface of upper box, set up two stiffening ribs along the casing length direction, its length extends to extends on the casing, in case cause casing to break because of automobile violent shake in the process of moving; Set up two stiffening ribs along the casing length direction at lower box cogged assembly die cavity outer surface, not only intensity has obtained reinforcement, and has constituted symmetry with former stiffening rib, makes its outward appearance more harmonious.

Adopt above-mentioned design, the weak part of magnesium alloy for cabinet of speed changer is strengthened, the distribution performance of intensity is significantly improved, maximum excitation power descends, can effectively avoid product to occur fatigue damage too early, the good integrity of casing, and also newly-designed casing can adopt former aluminum alloy manufacturing mechanism, frock to make, assemble fully, do not have big variation on the cavity design of mould yet, can not bring bigger equipment input.

Description of drawings

Fig. 1 is that this mission case is always schemed;

Fig. 2 A is the upper box plan view;

Fig. 2 B is the upper box plan view;

Fig. 2 C is the upper box left view;

Fig. 2 D is an E-E sectional view among Fig. 4;

Fig. 3 A is the lower box right elevation;

Fig. 3 B is the lower box plan view.

Embodiment

This motor uses the general structure of magnesium alloy for cabinet of speed changer referring to Fig. 1, and it comprises upper box 1, lower box 2 and extends casing 3.Referring to Fig. 3 A, the utility model lower box small end face upper bearing (metal) hole φ 58 places increase the thick stiffening rib 4 of 5mm between former two stiffening ribs.Referring to Fig. 2 B, set up the stiffening rib 2 of a 5mm at upper box large end face one side dress starting electrical machinery place., referring to Fig. 2 C and 2D, strengthen in the upper box dress stud bolt external arc R12 of place cylinder bottom with the casing face be connected chamfering R3.Further referring to Fig. 2 A, this magnesium alloy for cabinet of speed changer is set up two stiffening ribs 1 along the casing length direction on big end one side external surface of upper box, and its length extends to extends on the casing.Referring to Fig. 3 B, set up two stiffening ribs 5 along the casing length direction at lower box cogged assembly die cavity outer surface.

Claims

1, a kind of motor magnesium alloy for cabinet of speed changer comprises upper box, lower box and extension casing, it is characterized in that lower box small end face upper bearing (metal) hole φ 58 places, increases the thick stiffening rib of 5mm between former two stiffening ribs; Upper box large end face one side dress starting electrical machinery place sets up the stiffening rib of a 5mm; The upper box dress stud external arc R12 of place cylinder bottom strengthen with the casing face be connected chamfering R.

2, motor magnesium alloy for cabinet of speed changer according to claim 1 is characterized in that: set up two stiffening ribs along the casing length direction on big end one side external surface of upper box, its length extends to extends on the casing; Following upper box cogged assembly die cavity outer surface is set up two stiffening ribs along the casing length direction.