CN201021091Y

CN201021091Y - Automobile suspension combined spring device

Info

Publication number: CN201021091Y
Application number: CNU2007200690765U
Authority: CN
Inventors: 曹晓青
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-04-19
Filing date: 2007-04-19
Publication date: 2008-02-13
Anticipated expiration: 2017-04-19

Abstract

The utility model discloses a vehicle suspension combination elastic device, which comprises a vehicle axle and a vehicle frame. Two compression springs forming an included angle are symmetrically arranged between the vehicle axle and the vehicle frame, wherein one compression spring is connected with the left edge of the vehicle axle and the left edge of the vehicle frame through a hinge, the other compression spring is connected with the right edge of the vehicle axle and the right edge of the vehicle frame through the hinge; one compression spring connected with the vehicle axle and the vehicle frame is arranged between the two compression springs forming an included angle. The utility model reasonably utilizes the mechanics combination principle, preferably solves the contradiction of the smooth-going and stability of the vehicle suspension, and has enough holding power, the applied range is wide, not only can the utility model be used for the small car, but also can be used for the heavy vehicle.

Description

Automotive suspension combined elastic device

Technical field

The utility model relates to a kind of combined elastic device, relates in particular to a kind of automotive suspension combined elastic device.

Background technology

Automotive suspension is connected between vehicle bridge and the vehicle frame, plays buffering, guiding and damping of vibrations, is made up of elastic element, guide piece and bumper usually.It is excessive to jolt when preventing running car, and the elasticity modulus of the elastic element on the automotive suspension can not be too big, and promptly elastic element is wanted " soft " in other words; In order to make automotive suspension have enough strong bearing force and road-holding property, reduce the inclination and the pitching of car body, the elasticity modulus of the elastic element on the automotive suspension again can not be too little, and promptly in other words, elastic element is wanted " firmly ".

Present automotive suspension adopts the mono-elastic element mostly, such as, steel spring, coil spring, torsion bar spring, gas spring and rubber spring, these springs respectively have advantage, and, these springs all can't satisfy the requirement of above-mentioned two aspects separately simultaneously.

In order to overcome the deficiency of above-mentioned spring, be necessary to develop a kind of combined elastic device, existing good buffering and damping performance have enough bearing forces and road-holding property again.

Summary of the invention

The purpose of this utility model provides a kind of automotive suspension combined elastic device that has fine buffering, shock-absorbing function and road-holding property concurrently.

The utility model adopts following technical scheme:

A kind of automotive suspension combined elastic device, comprise vehicle bridge, vehicle frame, between vehicle bridge and vehicle frame, be symmetrical arranged two compression springs that become angle, one of them compression spring hinge connects the left hand edge of vehicle bridge and the left hand edge of vehicle frame, and another compression spring hinge connects the right hand edge of vehicle bridge and the right hand edge of vehicle frame; And a compression spring that connects vehicle bridge and vehicle frame vertically is set, the line of centers of this spring becomes the symmetrical center line of compression spring of angle on same perpendicular with two.

On the technique scheme basis, described compression spring is coil spring or gas spring.In detail, becoming two compression springs of angle all is identical gas spring, all is identical coil spring perhaps, and vertically is arranged on the central spring between vehicle bridge and the vehicle frame that this central spring is the coil spring or the gas spring of variable rigidity.

On the technique scheme basis, described gas spring is a bellows type air spring, or diaphragm type air spring, or hydro-pneumatic spring, or the gas spring of other type.

Mechanical analysis to above-mentioned automotive suspension combined elastic device is as follows:

1. existing the remembering with joint efforts of in the vertical direction that the compression spring of two one-tenth angles is formed made Fa, the displacement of spring in the vertical direction is X, with X is abscissa, with Fa is that ordinate is set up rectangular coordinate system, the displacement of the make a concerted effort Fa and the spring in the vertical direction of the elastic force of compression spring forms curve as shown in Figure 2, when two compression springs that become angles were moved to some position height, Fa reached maxim, and promptly the P ordinate of order is a maximum.

2. the elastic force note that will vertically be arranged on the central spring between vehicle bridge and the vehicle frame is made Fb, the displacement of spring in the vertical direction is X, with X is abscissa, with Fb is that ordinate is set up rectangular coordinate system, forms curve as shown in Figure 3, can be with the cluster spring adjustment, when making Fa reach near the maxim, the elasticity modulus of Fb significantly increases, and promptly the elastic force of Fb significantly becomes big after the P point, thereby forms curve shown in Figure 3.

3. Fig. 2 and Fig. 3 are combined and form as shown in Figure 4 curve, curve shown in Figure 4 is total variation diagram of making a concerted effort of this automotive suspension combined elastic device, be F=Fa+Fb, the curve of Fig. 4 can be divided into three piecewise analysis, OE section and FD section dynamic elasticity coefficient are very big, and the automotive suspension of this moment shows good rigidity, the stability of automobile is good, EF section dynamic elasticity coefficient is very little, and ride comfort is splendid, and C point wherein is the ideal static operation point.Work as Uneven road, cause that vehicle bridge rises and falls significantly, need only fluctuation range between Xe and Xf, the variation of the suffered bearing force of car body between Fe and Ff is very little, and be very steady.

From above-mentioned coordinate curve analysis as can be seen, this automotive suspension combined elastic device can make suspension have buffering, cushioning performance and enough big bearing force preferably simultaneously in the EF section, solves the contradiction between automobile ride and the stability preferably.

Simultaneously, the utility model also has following advantage: one, simple and compact for structure, and low cost of manufacture; Two, this has utilized mechanics combinatorial principle, long service life rational in infrastructurely; Three, can select suitable spring according to the needs that use, widely applicable, both can be used in C-class, also can be used in autotruck.When being used for the vehicle that load change is little or the ride comfort requirement is low slightly, can select the coil spring of cheap and durable; When being used for the vehicle that load change is very big, ride comfort is had relatively high expectations, can selecting gas spring, and elasticity can be regulated.

Description of drawings

Fig. 1 is an integral structure scheme drawing of the present utility model;

Fig. 2 is the function curve with spring displacement in vertical direction of making a concerted effort of the compression spring elastic force of two symmetries that become angles;

Fig. 3 is the elastic force of central spring and the function curve of spring displacement in vertical direction;

Fig. 4 is always make a concerted effort a function curve with spring displacement in vertical direction of elastic force of the present utility model.

Code description among Fig. 1

1---vehicle bridge 2---vehicle frame

3,4---compression spring 5---central spring

The specific embodiment

Below in conjunction with Fig. 1, Fig. 2, Fig. 3 and Fig. 4 the utility model is further described, a kind of automotive suspension combined elastic device, comprise vehicle bridge 1, vehicle frame 2, between vehicle bridge 1 and vehicle frame 2, be symmetrical arranged two compression springs 3,4 that become angle, one of them compression spring 3 hinge connects the left hand edge of vehicle bridge 1 and the left hand edge of vehicle frame 2, and another compression spring 4 hinges connect the right hand edge of vehicle bridge 1 and the right hand edge of vehicle frame 2; And a compression spring that connects vehicle bridge 1 and vehicle frame 2 vertically is set, and this compression spring is called central spring 5, the line of centers of central spring 5 becomes the symmetrical center line of compression spring 3,4 of angle on same perpendicular with two.

In the present embodiment, described compression spring 3,4 is a coil spring, and central spring 5 is the coil spring of variable rigidity.

1. existing the remembering with joint efforts of in the vertical direction that the compression spring 3,4 of two one-tenth angles is formed made Fa, the displacement of spring in the vertical direction is X, with X is abscissa, with Fa is that ordinate is set up rectangular coordinate system, the displacement of the make a concerted effort Fa and the spring in the vertical direction of the elastic force of compression spring 3,4 forms curve as shown in Figure 2, when two compression springs 3,4 that become angles were moved to some position height, Fa reached maxim, and promptly the P ordinate of order is a maximum.

2. the elastic force note of central spring 5 is made Fb, the displacement of spring in the vertical direction is X, with X is abscissa, with Fb is that ordinate is set up rectangular coordinate system, forms curve as shown in Figure 3, can be with the cluster spring adjustment, when making Fa reach near the maxim, the elasticity modulus of Fb significantly increases, and promptly the elastic force of Fb significantly becomes big after the P point, thereby forms curve shown in Figure 3.

Claims

1. automotive suspension combined elastic device, comprise vehicle bridge, vehicle frame, it is characterized in that: between vehicle bridge and vehicle frame, be symmetrical arranged two compression springs that become angle, one of them compression spring hinge connects the left hand edge of vehicle bridge and the left hand edge of vehicle frame, and another compression spring hinge connects the right hand edge of vehicle bridge and the right hand edge of vehicle frame; And a compression spring that connects vehicle bridge and vehicle frame vertically is set, the line of centers of this spring becomes the symmetrical center line of compression spring of angle on same perpendicular with two.

2. automotive suspension combined elastic device according to claim 1 is characterized in that: described compression spring is coil spring or gas spring.

3. automotive suspension combined elastic device according to claim 2 is characterized in that: described gas spring is a bellows type air spring, or diaphragm type air spring, or hydro-pneumatic spring.