CN203611648U

CN203611648U - I beam structure front axle body

Info

Publication number: CN203611648U
Application number: CN201320646480.XU
Authority: CN
Inventors: 韩振国; 魏建飞; 刘继军
Original assignee: Beiben Trucks Group Co Ltd
Current assignee: Beiben Trucks Group Co Ltd
Priority date: 2013-10-17
Filing date: 2013-10-17
Publication date: 2014-05-28
Anticipated expiration: 2023-10-17

Abstract

The utility model discloses an I beam structure front axle body, and belongs to the technical field of design of automotive parts. The I beam structure front axle body is characterized in that an offset I beam structure is arranged between two leaf spring surfaces. The center of a main pin hole and the center of a leaf spring are offset to distinguish the assembly direction, so that the front axle bears force better in a braking working condition, and an inner-side limit block can be only reserved; the stress value of the front axle body using an offset I beam is less than that of the front axle body using the traditional symmetric structure in a simulation working condition; the problems that the front axle body has stress concentration, unreasonable stress distribution, large mass, high cost and the like in a vertical bending working condition and the braking working condition are solved.

Description

Pontic before a kind of structural I-beam

Technical field

The utility model belongs to the Design of Auto Parts technical field, relates to the non-driving structural I-beam of heavy motor vehicle steeraxle.

Background technology

Non-driving steeraxle is to utilize the stub between steering swivel and front pontic to connect, and makes wheel be rotated to realize turning to of automobile around stub, and general multidigit, in automotive front, therefore also often becomes propons.Non-driving steeraxle, except bearing vertical load, also bears the moment that longitudinal force and side force and these power cause.To forge and form with steel as the front pontic of non-driving propons body element.Between front pontic two leaf spring faces 1, be designed to I shape and can guarantee that its quality rigidity minimum and in vertical plane is large, intensity is high, front pontic leaf spring face 1 is to neck 3 squarelys between bridge fist 2, can improve torsional strength, as shown in Figure 1, existing front steering axle pontic main cross sections is section for symmetrical " work " font.

Before tradition, pontic is not distinguished assembly direction, and front pontic kingpin bore axis 4 is coplanar with leaf spring face 1 axis, and the structural I-beam between two spring blocks 1 is symmetrical expression.Conventional confguration is not highly resistant to horizontal bending moment under emergency braking operating mode, easily produces the concentrated pontic that causes of stress and ruptures, and in the time of vertical dynamic load operating mode, is not highly resistant to vertical moment of flexure.If meet various operating mode demands, utilize conventional confguration to cause design rough, product weight is large, and cost is high, without lightweight advantage.

In conjunction with Fig. 1, front pontic, under vertical curve operating mode and damped condition, can obtain each section of Bending Moment Equations according to mechanical model, can obtain bending-moment diagram and twisting moment diagram by equation.Therefrom can find out that E-E cross section is for plane of weakness.But H-girder is symmetrical expression in traditional design, regardless of assembly direction, easily produces the concentrated pontic that causes of stress and rupture.Various operating modes are not carried out to specific aim design, therefore under the prerequisite that meets each operating mode, cause Cross section Design rough, product weight is high, and cost is high.

Utility model content

The technical matters that the utility model solves is to provide the front pontic of a kind of structural I-beam, between two leaf spring faces, be designed to offset structural I-beam, can solve propons body stress under vertical curve operating mode and damped condition and concentrate, distribution of stress is unreasonable, quality is large, high in cost of production problem.

The technical scheme that solves the utility model technical matters is that pontic before a kind of structural I-beam, comprises two leaf spring faces, the bridge fist at two ends, limiting stopper, the H-girder between bridge fist, between two leaf spring faces, cross section is I shape, and leaf spring face is positioned at the upper horizontal bar of H-girder, two leaf spring face symmetries; It is characterized in that, a limiting stopper is positioned at the bridge fist inner side on front pontic; The kingpin bore axis at two ends departs from certain distance L to leaf spring horizontal center line inner side, and L gets 20-40mm, two ends kingpin bore deflection the same side; Between two leaf spring faces, the stage casing of a section is asymmetric H-girder, and the upper horizontal bar width L1 in H-girder inner side is greater than the upper horizontal bar width L2 in outside; On inner side, horizontal bar thickness L3 is greater than the upper horizontal bar thickness L4 in outside; The lower horizontal bar thickness L5 in outside is greater than the lower horizontal bar thickness L6 in inner side; Be greater than the lower horizontal bar thickness of other parts at the lower horizontal bar thickness of the H-girder in leaf spring face place.

The beneficial effects of the utility model are, distinguish assembly direction, and stress dispersion is good, and H-girder is asymmetric structure, effectively reduces each operating mode stress value, and product weight is light, and cost is low.

Specified axle load is the front pontic of the employing offset structural I-beam of 5.5 tons, and under vertical dynamic load operating mode and emergency braking operating mode, each position stress value is all less than the stress value that specified axle load is 7.5 tons of existing front pontic same area, and stress value is evenly distributed.Before offset structural I-beam, pontic finished weight is 77.128kg, and 4.5 tons of propons body weight of product rated load of conventional confguration are 95.6Kg, before solution, in the problem of stress concentration of pontic in the time of each condition, realize lightweight object.

Accompanying drawing explanation

The utility model has 4 width accompanying drawings.

The schematic diagram of pontic before the existing structural I-beam of Fig. 1;

Pontic front view before Fig. 2 a kind of structural I-beam of the present utility model;

Pontic birds-eye view before Fig. 3 a kind of structural I-beam of the present utility model.

E-E in Fig. 4 Fig. 3 is to view (top is upper horizontal bar, and right side is inner side).

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Pontic before a kind of structural I-beam of the present utility model, comprises two leaf spring faces, the bridge fist at two ends, and limiting stopper, the H-girder between bridge fist, leaf spring face is positioned at the upper horizontal bar of H-girder, two leaf spring face symmetries.

The something in common of front pontic of the present utility model and existing front pontic is, between front pontic two leaf spring faces 1, cross section is I shape, difference is, existing front pontic kingpin bore axis 4 is coplanar with leaf spring face 1 axis, and the structural I-beam between two spring blocks 1 is symmetrical expression.

Inventive point of the present utility model is mainly reflected in following 3 aspects.

1, as shown in Figure 3, kingpin bore center and leaf spring center-biased are to distinguish assembly direction, stressed better while making propons body damped condition, and can only retain inner side limiting-position piece 3.The kingpin bore axis 4 at two ends departs from certain distance L to leaf spring horizontal center line 5 inner sides, generally gets 20-40mm, distinguishes direction when assembling, and there is limiting steering piece the bridge fist inner side on front pontic, two ends kingpin bore deflection the same side.Inner side is automobile reversing sense one side of advancing, and outside is automobile working direction one side.

2, the stage casing of a section between two leaf spring attachment faces is designed to asymmetric structural I-beam, H-girder inner side (inner side be automobile advance reversing sense) upper horizontal bar width (being that end is from H-girder neutral surface distance) L1 is greater than the upper horizontal bar width L2 (outside is automobile working direction) in outside; On inner side, horizontal bar thickness L3 is greater than the upper horizontal bar thickness L4 in outside; The lower horizontal bar thickness L5 in outside is greater than the lower horizontal bar thickness L6 in inner side, as shown in Figure 4.

3. the below at leaf spring face place is horizontal bar 6 position thickenings under H-girder, is greater than the lower horizontal bar thickness of other parts, as shown in Figure 2 at the lower horizontal bar thickness of the H-girder in leaf spring face place.

Adopt the stress value of " offset H-girder " front pontic under simulated condition to be all less than traditional symmetrical structure." offset H-girder " front pontic finished weight that rated load is 5.5 tons is 77.128kg, and 4.5 tons of H-girder symmetrical structure propons body weight of existing rated load are 95.6Kg,

The utility model is to meet on other existing front pontic performance perameter bases, and the specified axle load of front pontic is 5.5 tons.

Claims

1. a pontic before structural I-beam, comprises two leaf spring faces, the bridge fist at two ends, and limiting stopper, the H-girder between bridge fist, between two leaf spring faces, cross section is I shape, leaf spring face is positioned at the upper horizontal bar of H-girder, two leaf spring face symmetries; It is characterized in that, a limiting stopper is positioned at the bridge fist inner side on front pontic; The kingpin bore axis at two ends departs from certain distance L to leaf spring horizontal center line inner side, and L gets 20-40mm, two ends kingpin bore deflection the same side; Between two leaf spring faces, the stage casing of a section is asymmetric H-girder, and the upper horizontal bar width L1 in H-girder inner side is greater than the upper horizontal bar width L2 in outside; On inner side, horizontal bar thickness L3 is greater than the upper horizontal bar thickness L4 in outside; The lower horizontal bar thickness L5 in outside is greater than the lower horizontal bar thickness L6 in inner side; Be greater than the lower horizontal bar thickness of other parts at the lower horizontal bar thickness of the H-girder in leaf spring face place.