CN1857939A

CN1857939A - High rigidity riding vehicle rear axle

Info

Publication number: CN1857939A
Application number: CN 200610026667
Authority: CN
Inventors: 祁斌
Original assignee: SHANGHAI JIASHIJIU ENTERPRISE DEVELOPMENT Co Ltd
Current assignee: SHANGHAI JIASHIJIU ENTERPRISE DEVELOPMENT Co Ltd
Priority date: 2006-05-18
Filing date: 2006-05-18
Publication date: 2006-11-08

Abstract

The high rigidity rear axle for car is constituted through connecting the rear axle tube, the longitudinal axle tube and the support integrally, and setting two needle bearings into longitudinal oscillating arm. The outer bearing for the longitudinal axle tube is one integral ring. The rear axle in the said structure has high strength and high rigidity, less early wear, less deformation and less wear of tyre, and can raise the running performance of the car.

Description

High rigidity riding vehicle rear axle

Technical field

The present invention relates to a kind of high rigidity riding vehicle rear axle, belong to the category of manned vehicle rear suspension assembly.

Background technology

The family expenses riding vehicle rear axle is the important assembly parts of of manned vehicle chassis, its reasonableness structurally directly affects the stable and safety performance of manned vehicle, simultaneously also affect the life-span and the maintenance on manned vehicle chassis, but also can the parts that rear suspension assembly connects mutually be affected.

Riding vehicle rear axle (Fig. 1) for the arm-type independent suspension of single pitch, its main body is bound up by stabilizer rod (1) and torsion bar (7,11) by back axle central siphon (3), inside and outside needle bearing (2,6), swing arm central siphon (4), support (5) and these five kinds of vital partss of trailing arm (8), torsion bar (7, a 11) end is fixed on the support (5), and the other end is fixed on the trailing arm (8).Trailing arm (8) connects with two trailing wheels mutually by hub spindle (10), drg, and left and right sides support is supporting the latter half of weight of manned vehicle by the elastic buffer piece on the servo support, connects mutually with vehicle body by the double-acting type hydraulic shock absorber simultaneously.

Existing riding vehicle rear axle is owing to structural irrationality, and integral rigidity is poor, exists many shortcomings:

For example, certain type riding vehicle rear axle structure (Fig. 1) can be regarded back axle central siphon (3) and (5) one groups of parts of support and trailing arm (8) and (4) one groups of parts of swing arm central siphon as and form swing by two needle bearings (2,6).Because two needle bearings (2,6) are at a distance of big (213mm), integral rigidity is poor, easy deformation, moment of flexure at car trailing arm in service (8) and (4) one groups of parts of swing arm central siphon makes bearing (2,6) wearing and tearing too early, make swing arm central siphon (4) and back axle central siphon (3) lose right alignment, cause car to break away and wear on tyres, reduced riding traveling comfort.In addition, inadequate natural endowment structurally, two needle bearings (2,6) that are on back axle central siphon (3) the in-to-in swing arm central siphon (4) contact with (5) two parts of back axle central siphon (3) and support respectively, work in-process bearing (2,6) is difficult to guarantee in optimum regime with the tolerance clearance of back axle central siphon (3), support (5), rear overhang is hung assembly and will be out of shape inevitably in operational process, finally cause prenex and tire inclination deviation, thereby influence the car load rideability.Simultaneously, for neck bearing (2) is installed, back axle central siphon (3) must be not easy to processing away from the axle head undergauge, also is difficult for guaranteeing working accuracy.In addition, the two ends of this back axle central siphon (3) are sealing not, and back axle central siphon (3) is water inlet easily, makes back axle central siphon (3) corrosion prematurely, greatly reduces service life and has increased maintenance load and maintenance cost.

And for example, the back axle central siphon (2) and swing arm central siphon (3) length of fit of existing certain another model riding vehicle rear axle structure (Fig. 2) are almost 0, can regard as cooperate the utmost point not closely, all very poor (3) one groups of parts of back axle central siphon (2), support (4), swing arm central siphon and the trailing arm (7) of strength and stiffness, form swing by two bearings (5,8) that are positioned on swing arm central siphon (3) outer end.Though the fulcrum of two bearings is little, bearing is not to be in two groups but be between two parts, processing is easier to guarantee tolerance clearance, the wearing and tearing of bearing have been improved, but its main shortcoming is, process and be installed in trailing arm central siphon (3) and back axle central siphon (2) in the support (4) is difficult to guarantee both when assembling right alignment respectively, length of fit between trailing arm central siphon (3) and support (4) is too short in addition, the moment of bearing trailing arm (7) is little, under the effect of trailing arm power, can produce the gap unavoidably between trailing arm central siphon (3) and support (4), can lose the right alignment of trailing arm central siphon (3) and back axle central siphon (2) again once more, finally cause prenex and tire inclination deviation, thereby influence the car load rideability.

Summary of the invention

The object of the present invention is to provide the riding overall height rigidity of a kind of alternative family expenses back axle, it adopts one-piece construction, has improved the strength and stiffness of back axle central siphon, support and trailing arm central siphon; Shorten the fulcrum of inside and outside two needle bearings, be convenient to guarantee back axle central siphon and the right alignment of trailing arm central siphon in processing and assembling; Can also prevent the rear axle water inlet.The present invention especially wants to provide a kind of back axle, and it reduces the bearing premature wear, avoids car to break away and wear on tyres, reduces inclination angle accuracy error and prenex deviation, improves the car load rideability, increases service life

The riding overall height rigidity of a kind of family expenses shown in Figure 3 disclosed by the invention back axle, be bound up by stabilizer rod (1) and torsion bar (6,11) by back axle central siphon (2), inside and outside needle bearing (5,8), swing arm central siphon (3), support (4) and these five kinds of vital partss of trailing arm (7), wherein back axle central siphon (2), trailing arm central siphon (3) and support (4) fuse by flush fit, inside and outside needle bearing (5,8) moves and is put in the trailing arm (7), and the outer bearing (8) of trailing arm central siphon (3) adopts integral type outer race.

Because back axle central siphon (2), trailing arm central siphon (3) and support (4) fuse by flush fit, so the rigidity of rear suspension assembly and intensity are improved.Compare to prior art, this can reduce the distortion in the automotive operation, reduces wear on tyres, avoids prenex and changes with the tire inclination deviation, thereby improved the car load rideability.

Be put in the trailing arm (7) because inside and outside needle bearing (5,8) moves, therefore the pivot distance of two needle bearings (5,8) shortens, thereby reduces the influence of trailing arm (7) moment of flexure to bearing (5,8), has overcome the premature wear of bearing (5,8).

The outer bearing (8) of trailing arm central siphon (3) adopts integral type outer race, is in order to prevent that muddy water from entering back axle central siphon (2) and causing corrosion.

The job operation of the riding overall height rigidity of family expenses of the present invention back axle is: before assembling, earlier trailing arm central siphon (3) is a tight fit in back axle central siphon (2), trailing arm central siphon (3) to these branch unit two ends carries out disposable ground finish then, to guarantee the right alignment of this branch unit and whole back axle, again this branch unit is a tight fit in support (4).

Effect of the present invention is achieved by the following technical solution:

1, the end with trailing arm central siphon (3) inserts back axle central siphon (2) formation flush fit, and making cooperatively interacts reaches certain length;

2, press-fiting good back axle central siphon branch unit, carry out the outer disposable grinding in garden of two ends, make it to guarantee fully with one heart;

3, again the back axle central siphon (2) behind the flush fit and trailing arm central siphon (3) are press-fited in the support (4), reach certain length, the three is become one with the flush fit of support (4);

4, increase the width of support (4), the rigidity after the raising triplicity;

5, two needle bearings (5,8) are placed (7) parts of trailing arm.Because the pivot distance of bearing (5,8) reduces, bearing under the situation of same moment, the present invention can make bearing (5,8) reduce premature wear, increases service life;

6, bearing (8) outer ring of trailing arm central siphon (3) outer end is made enclosedly, enters back axle to prevent muddy water.

7, owing to shortened trailing arm central siphon (3), reduced and used material, helped the lightweight of automobile, reduced consumption of fuel, energy-saving material-saving.

Improved the integral rigidity of rear suspension assembly so greatly, guaranteed precision in processing and the assembling more conveniently, the variation of back axle central siphon (2) and trailing arm central siphon (3) right alignment in further having reduced to use, guaranteed the variation at automobile toe-in and tire inclination angle, improved service life simultaneously, reduced maintenance load.

Description of drawings

Fig. 1 is existing certain model back axle structural representation.

Fig. 2 is existing certain another model back axle structural representation.

Fig. 3 is a high rigidity back axle structural representation of the present invention.

The specific embodiment

After the high rigidity of the present invention bridge construction as shown in Figure 3, it is made up of stabilizer rod (1), back axle central siphon (2), trailing arm central siphon (3), support (4), preceding torsion bar (6), neck bearing (5), spacer ring (9), outer bearing (8), trailing arm (7), hub spindle (10) and back torsion bar (11); Its stabilizer rod can be built-in (in back axle central siphon (2)), also can be external (outside back axle central siphon (2)); Wherein, back axle central siphon (2), trailing arm central siphon (3) and support (4) fuse by flush fit; Inside and outside needle bearing (5,8) moves and is put in the trailing arm (7); The outer bearing (8) of trailing arm central siphon (3) adopts integral type outer race.

The concrete grammar step of its processing and assembling is as follows:

1,, back axle central siphon (2) two ends is carried out the section of cooperation of undergauge processing and right boring processing central siphon endoporus, correct grinding processing back axle central siphon and support (4) by certain-length and diameter according to the requirement of different back axles;

2, the section of cooperation of correct grinding processing trailing arm central siphon and back axle central siphon;

3, trailing arm central siphon (3) is pressed into back axle central siphon (2), the section of cooperation of correct grinding processing two ends trailing arm central siphon and bearing (5,8);

4, back axle central siphon (2) is pressed into support (4);

5, go up running in bearings (5,8) and spacer ring (9) at trailing arm central siphon (3);

6, trailing arm (7) is pressed on the trailing arm central siphon (3) that tape spool holds.

Claims

1, the riding overall height rigidity of a kind of family expenses back axle, be bound up by stabilizer rod (1) and torsion bar (6,11) by back axle central siphon (2), inside and outside needle bearing (5,8), swing arm central siphon (3), support (4) and these five kinds of vital partss of trailing arm (7), it is characterized in that:

Back axle central siphon (2), trailing arm central siphon (3) and support (4) fuse by flush fit, thereby improve the rigidity and the intensity of rear suspension assembly;

Inside and outside needle bearing (5,8) moves and is put in the trailing arm (7), thereby shorten the fulcrum of two needle bearings (5,8), reduce of the influence of trailing arm (7) moment of flexure to bearing (5,8), overcome the premature wear of bearing (5,8), reduced the distortion in the automotive operation, reduced wear on tyres, avoided prenex and changed, thereby improved the car load rideability with the tire inclination deviation.

2, the riding overall height rigidity of family expenses according to claim 1 back axle is characterized in that the outer bearing (8) of described trailing arm central siphon (3) adopts integral type outer race, to prevent that muddy water from entering back axle central siphon (2) and causing corrosion.

3, according to the job operation of claim 1, the riding overall height rigidity of 2 described family expenses back axle, it is characterized in that: before assembling, earlier trailing arm central siphon (3) is a tight fit in back axle central siphon (2), swing arm central siphon (3) to these branch unit two ends carries out disposable ground finish then, to guarantee the right alignment of this branch unit and whole back axle, again this branch unit is a tight fit in support (4).