CN202170948U - Novel plate springs and suspension - Google Patents

Abstract

The utility model relates to plate springs, especially a plate spring and a suspension using the plate springs used for a vehicle suspension system. A middle part of each of the plate springs is relatively thick, and two ends of the plate spring are relatively thin, and the part between the middle part and the two ends is a gradually changing transition section. The suspension comprises a plurality of laminatedly arranged plate springs and connection parts, and is characterized in that the middle parts of the plate springs are relatively thick, and two ends of the plate springs are relatively thin, and the parts between the middle parts and the ends are gradually changing transition sections; a plurality of plate springs are bended and laminated correspondingly in the same direction; the plate springs are contacted with each other in a surface to surface manner; the transmission acting force can be inevitably more uniform. Not only can the applied force on the suspension be more uniform, but also the damping performance can be good. The possibility of damage on one plate spring caused by partial uneven force application can be prevented. The plate springs provided in the utility model have wide application in the vehicle suspension system, and meanwhile can be used in the occasion where a plurality of layers of plate springs are arranged in a laminated manner.

Description

Novel leaf spring and suspension

Technical field

The utility model relates to leaf spring, especially vehicle suspension system leaf spring that uses and the suspension that utilizes this leaf spring.

Background technique

The leaf spring cross section along its length of existing leaf spring all is prismatic.Common multi-disc leaf spring arranged stacked; The width of leaf spring, thickness equate; Usually the leaf spring that gets in the shackle bracket is the longest, and all the other leaf spring length are successively decreased, and it is overall so just to have constituted suspension; The short side of the leaf spring of suspension is connected with vehicle bridge or wheel, the first side two ends are connected with car body or vehicle frame in addition, also has certainly to connect the occasion of using in contrast; The vibrations meeting of wheel is realized buffering and damping effect by the elastic strain of transfer function power generation and elastic acting force counteracting successively between the leaf spring then.Such leaf spring and suspension are widely used in the suspension system of automobile, tractor and rail truck; And have a long history.

But such suspension damping performance is still reliable and stable inadequately; Mainly show: the force transmission between prismatic leaf spring is still even inadequately; Will lean on than the intensity of long slab spring self and the transmission of rigidity realizable force because stretch out than the part of short slab spring than the long slab spring; The all such transfer function power of multilayer leaf spring has in fact also just become a kind of stack of nonuniformity, certainly will cause unbalance stress like this; The thickness size of monolithic leaf spring is less simultaneously, and single leaf spring is distortion under external force easily, so just further increases the weight of discontinuity; Also have single leaf spring thickness size little, intensity is low, damages easily; Leaf spring number on each suspension is many, and connected elements such as connecting bolt are many, uses the inconvenient overall cost that also increases device simultaneously.

Summary of the invention

The purpose of the utility model provides a kind of novel leaf spring, and this leaf spring is applicable in the suspension of vehicle and has stressed uniform characteristic.

Be to realize above-mentioned purpose, the utility model has adopted following technological scheme: a kind of novel leaf spring is characterized in that: the leaf spring intermediate portion is thicker, two ends are thinner, between be the gradual transition section.

The crooked layer by layer back of such leaf spring arranged stacked just can be made into suspension.This leaf spring just is similar to the iso-stress beam.

Another object of the present invention is: the vehicle suspension that provides a kind of leaf spring that utilizes foregoing invention to conceive to process, suspension is stressed more even, the damping property better effects if.

For realizing above-mentioned purpose; The utility model has adopted following technological scheme: a kind of suspension, comprise a plurality of leaf springs and the connected element of range upon range of setting, and it is characterized in that: described leaf spring intermediate portion is thicker, two ends are thinner; Between be the gradual transition section, a plurality of leaf springs ground that coincide is crooked in the same way stacked.

The beneficial effect of the utility model is: suspension is whole be the integral body of gradual transition section for thick middle, two ends are thin, middle, realizes active force is transmitted the effect with damping equably with regard to the length that need not rely on the change leaf spring like this.Can be equal length between each leaf spring so, carry out the contact of face face between the leaf spring more, transfer function power be just inevitable more even.Not only suspension stressed more evenly, damping performance is better, and also avoided when a leaf spring occur local pressure uneven and ruined maybe.Such leaf spring has purposes widely in vehicle suspension system.Also be suitable for the occasion of the range upon range of setting of multilayer leaf spring in the existing technology simultaneously.

The standard size of suspension is the four-piece type structure; Also can be two-piece, three pieces type, five chips, six chips, seven slice structures, this selects and designs to get final product according to load capacity size and client's specific (special) requirements.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the plan view of Fig. 1;

Fig. 3 is that A-A among Fig. 1 is to sectional view;

Fig. 4 is that B among Fig. 1 is to view;

Fig. 5 is the left view of Fig. 4.

Embodiment

Like Fig. 1, utilize that a kind of intermediate portion is thicker, two ends are thinner shown in 2, between be the vehicle suspension that the leaf spring 1,2,3,4 of gradual transition section is made.Described leaf spring 1,2,3,4 is about the center symmetry.Just about two-part before and after in the longitudinal direction about neutral position symmetry, bilateral symmetry on width direction.Length ratio as for centre, two ends and gradual transition section does not then have strict requirement, can regard that when the gradual transition section is longer whole leaf spring all is that the cross section size gradually changes as yet.

The suspension that is constituted is exactly specifically; The a plurality of leaf springs 1,2,3,4 and the connected element that comprise range upon range of setting; Described leaf spring 1,2,3,4 intermediate portions are thicker, two ends are thinner, between be the gradual transition section, a plurality of leaf springs 1,2,3,4 ground that coincide is crooked in the same way stacked.Described identical ground curved major in the same way can be surperficial snugly stacked together as far as possible after will being meant each leaf spring bending, rather than want crooked radian in full accord.As shown in the figure, described suspension is about the center symmetry.Since leaf spring the 1,2,3, the 4th, about centrosymmetric, the suspension that constitutes so also is about centrosymmetric, like Fig. 1, shown in 2 naturally.The quantity of leaf spring is confirmed according to the design load of suspension and thickness, length, the width equidimension specification of leaf spring itself, the leaf spring that size is big more, and quantity is few more.For example among Fig. 1,2 in the structure of four leaf springs, the thickness * width of four leaf springs 1,2,3,4 is 32*120, and fulcrum can satisfy the requirement of 20 tons of design loads apart from being 1.55 meters.

Further improve and be: the leaf spring 4 lower surface levels of described lower side, leaf spring 4 equal in length of remaining leaf spring 1,2,3 and lower side and the ground downwarping that coincide successively.Leaf spring 4 can a side surface is arranged man-hour be smooth adding like this, is convenient to processing.

Further, pad 7 is set between the described leaf spring.So further be convenient to leaf spring 1,2,3, the even transmission and the dispersion of active force between 4; Reduce the machining accuracy of leaf spring 1,2,3 bending simultaneously; Leaf spring 1,2,3, realization face face contact between 4; Avoid the inhomogeneous of force transmission, also avoid leaf spring 1,2,3, directly produce metal friction between 4, reduce working life.

Described connected element comprises the company of wearing and is fastened on the screw bolt and nut 5 in leaf spring neutral position, is arranged on two chucks 8 on the gradual transition section; Described each chuck 8 reaches the nut check of mating with bolt by bolt 82, and two chucks 8 are about the neutral position symmetry of leaf spring 1,2,3,4.Just about the center line symmetry of vertical direction about suspension shown in Figure 1.Preferably, chuck 8 is " U " shape, and the bottom is provided with through hole, with the cushion block 83 of materials such as the backing metal of a low hardness of rivet or rubber, reduces the vehicle vibrations to impact and damage between connecting.

Further, described connected element comprises that lower floor's leaf spring 3 is longer than at orlop leaf spring 4 two ends and downwarping constitutes joint 9.The auxiliary fixing and the position-limiting action of the connected element that can realize like this suspension is connected with vehicle make the connected element of suspension and vehicle under big external impacts effect, also can not be shifted or come off, and guarantee that suspension plays reliable cushioning effect all the time.

Being suspended on the basis that keeps former uniform section leaf spring and suspension product each item performance like this can significantly reduce the quality and the complete vehicle quality of leaf spring, compares with general original multi-disc uniform section leaf spring, and sprung mass can reduce 51%.The changeable section plate spring of few sheet bending can improve automobile ride effectively, through the change to the leaf spring number, can realize the increase of spring fatigue life.

Leaf spring of the utility model and suspension are applicable to that the single-point suspension that trailer uses also is used in being suspended in the shock mitigation system of common vehicle.

Claims (8)

1. novel leaf spring, it is characterized in that: the leaf spring intermediate portion is thicker, two ends are thinner, between be the gradual transition section.

2. novel leaf spring according to claim 1 is characterized in that: described leaf spring is about the center symmetry.

3. suspension; The a plurality of leaf springs (1,2,3,4) and the connected element that comprise range upon range of setting; It is characterized in that: intermediate portion is thicker, two ends are thinner for described leaf spring (1,2,3,4), between be the gradual transition section, a plurality of leaf springs (1,2,3,4) ground that coincide is crooked in the same way stacked.

4. suspension according to claim 3 is characterized in that: described suspension is about the center symmetry.

5. suspension according to claim 4 is characterized in that: the leaf spring of described lower side (4) lower surface level, remaining leaf spring (1,2,3) and leaf spring (4) equal in length of lower side and identical ground downwarping successively.

6. suspension according to claim 5 is characterized in that: pad (7) is set between the described leaf spring.

7. according to claim 3 or 4 or 5 or 6 described suspensions; It is characterized in that: described connected element comprises the company of wearing and is fastened on the screw bolt and nut in leaf spring neutral position (5), is arranged on two chucks (8) on the gradual transition section; Described each chuck (8) reaches the nut check of mating with bolt by bolt (82), and two chucks (8) are about the neutral position symmetry of leaf spring (1,2,3,4).

8. suspension according to claim 7 is characterized in that: described connected element comprises that lower floor's leaf spring (3) is longer than at orlop leaf spring (4) two ends and downwarping constitutes joint (9).

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