CN2247110Y

CN2247110Y - Series connection composite structure and flexible spacer for main and assistant leaf spring of rear suspension of truck

Info

Publication number: CN2247110Y
Application number: CN 96229242
Authority: CN
Inventors: 杜干城; 杜志扬; 杜可扬
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-06
Filing date: 1996-02-06
Publication date: 1997-02-12
Anticipated expiration: 2006-02-06

Abstract

The utility model provides a series connection composite structure and flexible spacer for a main leaf spring and an assistant leaf spring of the rear suspension frame of a truck. The contact segment of the main leaf spring and the assistant leaf spring gradually increases the rigidity and forms into a gradual characteristic following the increase of load under the transferring function of the series connection of the spacer; therefore, the bearing potentiality of a suspension frame and the stressing performance of a vane can be improved; the service life of the leaf springs can be prolonged. When the utility model is used, the flexible spacer replaces a cushion block with stiffness with a traditional structure with convenience, simplicity and reliability. The utility model is suitable for all trucks especially for large motor vehicles for goods or passengers with larger load fluctuation and inferior running conditions.

Description

The series combination structure and the flexible gasket of the major and minor leaf spring of autotruck rear suspension

The utility model relates to the unitized construction of major and minor leaf spring in a kind of improved autotruck rear suspension, and particularly a kind of load change is big and in the major and minor spring unitized construction of heavy loading passenger car rear suspension of abominable road traveling.

Autotruck such as lorry and motorcoach rear suspension leaf spring, because of the big reason of its load change, the normal compound rigidity leaf spring that adopts by major and minor spring combination provides desirable vehicle running smoothness and road-holding property with this.The conventional combination structure of compound rigidity leaf spring is on auxiliary spring occupies, and main spring has a stiffness bearer at interval down between two springs, with two U-bolts their middle parts are fixed with automobile axle.Conventional confguration is in entrucking is used, major and minor spring central authorities grow constant because of the supporting of the interval auxiliary spring that is subjected to stiffness bearer, so compound rigidity value at major and minor two leaf springs when working jointly, equal their clamping rigidity sums separately, and the elastic behavior of constant all the time (not considering other factors) compound rigidity leaf spring is a broken line (see figure 2).Tradition is separated major and minor unitized construction and had following shortcoming: it is unfavorable to vehicle running smoothness that (one) rigidity increases suddenly; (2) after major and minor spring is worked simultaneously, displacement in their central clampings place is synchronous, auxiliary spring is because of its bearing receives the moment of flexure bigger than main spring apart from short, can make blade stress too high and rupture, and the burden that the auxiliary spring leaf destruction has increased the weight of main spring afterwards causes the damage of main spring blade.This damage phenomenon of conventional composite rigidity leaf spring is in overload with travel and occurring repeatedly in abominable ground-surface autotruck.

The purpose of this utility model provides a kind of series combination structure of improved major and minor leaf spring and novel pad wherein, makes the compound rigidity of major and minor spring, has roll-off characteristic.

Enforcement of the present utility model is also very simple, needs only the stiffness bearer that conventional combination structure Central Plains is used and pulls down, and changes the flexible gasket of the technical program.The material of pad can be with elastomeric or nonelastic but flexible steel.The central thickness of pad will guarantee to make a circular hole that is enough to hold two heads of major and minor spring center bolt.Upper and lower two surfaces at pad two ends should be done tapered, also can be only last or under a surface on do tapered (seeing Fig. 4,5,6), gradual with assurance pad and main spring excellent contact.

Adopt the technical program, can improve the potential bearing capacity of suspension, can reduce the blade stress under equal load of leaf spring.

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

Fig. 1 is the constructional drawing of the utility model embodiment.

Fig. 2 is the major and minor spring characteristic map of conventional combination structure.

Fig. 3 is the major and minor spring characteristic map of the technical program series combination structure.

Fig. 4 is the constructional drawing of the solid shim embodiment in the utility model.

Fig. 5, the 6th, the constructional drawing of the compound gasket example in the utility model.

1. main spring 2. auxiliary spring bearings 3. auxiliary springs 4. flexible gasket 5.U type bolts among the figure

In Fig. 1 embodiment, main spring (1) auxiliary spring (3) and the flexible gasket (4) in the middle of them are fixed by two U-bolts (5) and automobile axle simultaneously.When auxiliary spring not with its bearing (2) when contacting, by main spring burden, major and minor spring two end in contact bearings begin to work simultaneously with main spring load when load increases separately, after, load continues increase, the auxiliary spring amount of deflection progressively reduces until becoming negative value.In the said process, the contact segment of the bottom of auxiliary spring and pad increases before this, follows by the contact segment increase of pad (4) lower surface and main spring and has improved the compound rigidity of major and minor spring and made it have roll-off characteristic.At this moment the compound rigidity of major and minor spring is series connected from the stressing conditions speech, its value obviously greater than the rigidity of major and minor spring in the conventional confguration and, so can improve the potential bearing capacity of leaf spring.On the other hand, pad has not only played series connected key role in the technical program, and by selecting its different length, thickness, also can obtain the gradually degree scope of desirable suspension leaf spring rigidity.

Pad shown in Figure 4 is the solid shim among the utility model embodiment.Fig. 5, the 6th, among the utility model embodiment with the synthetic pad of two and plural vane group.The thickness of each blade can equate or unequal in the fabricate block pad.The combined method of fabricate block pad is as follows; (1) phase embedding combination, two protruding round cores are made in appropriate location, both sides in last lower surface, symmetry central authorities, and the correspondence position in following sheet is made two corresponding circular holes or pit (see figure 5), also can make protruding core and circular hole or pit on the blade relatively in reverse direction.(2) riveted joint combination, promptly with rivet the blade riveting of combination (see figure 6) together entirely.Pad by combination more than two or two should make the not changing of the relative positions mutually between combined blade in a word, can keep being contained in the concentric position of the major and minor spring center bolt head in their central circular holes reliably.In order to obtain bigger rigidity gradual change scope, can suitably lengthen pad, thicken on demand.

Claims

1, the major and minor leaf spring series combination structure in a kind of autotruck rear suspension is characterized in that: at major and minor spring middle device a flexible gasket is arranged, the material of pad is with elasticity or non-resilient but can be with the steel of major and minor spring bending; The central thickness of pad must be able to be made a circular hole that can hold two center bolt heads of major and minor spring; Two of pad produces end and does at least will a surface therein tapered; Pad can be that an integral body also can be by the synthetic fabricate block pad of two or more vane group.

2, by fabricate block pad in the described structure of claim 1, it is characterized by:

A, combined method can make up with phase embedding combination or riveted joint;

B, length are can each sheet identical or inequality;

C, thickness can each sheet equate or unequal.