CN2837131Y

CN2837131Y - Balanced suspension frame mechanism

Info

Publication number: CN2837131Y
Application number: CN 200520105270
Authority: CN
Inventors: 许宏帅; 程志翔
Original assignee: CIMC Vehicles Group Co Ltd; Yangzhou CIMC Tonghua Special Vehicles Co Ltd
Current assignee: CIMC Vehicles Group Co Ltd; Yangzhou CIMC Tonghua Special Vehicles Co Ltd
Priority date: 2005-08-31
Filing date: 2005-08-31
Publication date: 2006-11-15
Anticipated expiration: 2015-08-31

Abstract

The utility model relates to a balancing suspension frame mechanism for vehicles, which comprises a front middle spring bracket, a back spring bracket, a front balancing arm, a back balancing arm and a connecting rod, wherein the front middle spring bracket is fixed on a vehicle frame assembly; the back spring bracket is fixed on the vehicle frame assembly, and forms a preset distance with the front middle spring bracket in the length direction of the vehicle frame assembly; the front balancing arm is hinged on the front middle spring bracket, and a front connecting point is formed on the hinged position; the back balancing arm is hinged on the back spring bracket, and a back connecting point is formed on the hinged position; the connecting rod is provided with a first end hinged with the front balancing arm, and a second end hinged with the back balancing arm; the balancing suspension frame mechanism forms a parallelogram four-connecting rod mechanism. When the wheelbase of the vehicles is needed to be lengthened, only the length of the connecting rod is needed to be increased. At the time, the move relation of the front balancing arm and the back balancing arm is always keep consistent, and the strength remains unchanged so that the reliability of a balancing suspension frame device is enhanced.

Description

Equalizing suspension mechanism

Technical field

The utility model relates to a kind of equalizing suspension mechanism that is used for the equalizing-suspension device of vehicle, especially relates to a kind of equalizing suspension mechanism that can the extension shaft distance.

Background technology

Traditional equalizing-suspension device as shown in Figure 1, normally two groups of 13 of steel springs are provided with equalizing suspension mechanism 11 to equalizing-suspension device in front and back, like this on uneven road surface, rely on the leverage of equalizing suspension mechanism 11 that the position and the road surface of the axletree of wheel 12 are just adapted, the wheel load of each is kept in balance.The structure of equalizing suspension mechanism 11 is shown in Fig. 2 A～Fig. 2 C, and this mechanism comprises: middle spring bracket 3, and it is fixed on the frame assembly; Equilibrium arm 1, spring bracket 3 during it is connected to by bearing pin 2.Equilibrium arm 1 can rotate around this bearing pin 2, thereby can swing.

Equilibrium arm 1 in the conventional art is an integral body, its center has a bearing pin, equilibrium arm front end and equilibrium arm rear end are with respect to this bearing pin symmetry, and equilibrium arm can rotate in certain scope of design around bearing pin, and the front-end and back-end of equilibrium arm can swing up and down in certain scope.

Fig. 2 A represents that equilibrium arm 1 does not have the state of swing, and Fig. 2 B represents the swing state that equilibrium arm 1 is low early and high after, and Fig. 2 C represents the low swing state in high back before the equilibrium arm 1.

In using, need extension shaft apart from the time, be that the length by direct lengthening two between centers equilibrium arms 1 realizes.

But behind the equilibrium arm lengthening, demonstrate the drawback that the arm of force is long, moment of flexure is bigger.In order to solve these drawbacks, often by overstriking equilibrium arm bearing pin and spacing in addition to the side on oscillation of equilibrium arm, still, inhibiting device can not reach the effect of restriction before the equilibrium arm modification, otherwise become interference or the gap is too little, influence freely swinging of equilibrium arm, when coming after the equilibrium arm distortion when spacing, elasticity or plastic deformation have taken place in equilibrium arm again, therefore, there is potential safety hazard all the time in the equalizing-suspension device of traditional extension shaft distance, and wheelbase is long more, and its intensity is poor more.

Summary of the invention

At the problems referred to above, the purpose of this utility model provides a kind of equalizing suspension mechanism, and it is under the prerequisite of free extension shaft distance, and equalizing-suspension device still can keep extension shaft apart from preceding performance, and the performance of suspension is not subjected to the influence of wheelbase lengthening.

The equalizing suspension mechanism of this equalizing-suspension device comprises: spring bracket in preceding, and it is fixed in frame assembly; Spring bracket in the back, it is fixed in this frame assembly, and along this frame assembly length direction with should before in a spring bracket predetermined distance at interval; The forward horizontal stand arm, it is connected in this preceding middle spring bracket in hinged way, thus point of connection before forming; The back balance arm, it is connected in spring bracket in this back in hinged way, thereby forms the back point of connection; And connecting rod, it has and this forward horizontal stand arm pivotally attached first end, and with this back balance arm pivotally attached second end.

Preferably, first end of this connecting rod and the horizontal throw between second end equal the horizontal throw between this preceding point of connection and this back point of connection, and the vertical distance before being somebody's turn to do between point of connection and this first end equals the vertical distance between this back point of connection and this second end, thereby forms parallelogram linkage.

Preferably, this forward horizontal stand arm and this back balance arm and horizontal pivot angle scope up and down are ± 22 °.

The equalizing suspension mechanism that the utility model provides has adopted the structure at middle spring bracket place the four-bar linkage of parallelogram, with original one independently equilibrium arm be divided into two, middle spring bracket also is designed to forward and backward middle spring bracket, transmission by four-bar linkage between two equilibrium arms, reach transmit equal angles, etc. the effect of moment, the equilibrium arm at two ends is with respect to the equilibrium arm of extension shaft distance not, and its performance, size, pivot angle scope all remain unchanged.

Description of drawings

Fig. 1 shows traditional equalizing-suspension device, and it is applied in the two-axle semitrailer;

Fig. 2 A～Fig. 2 C shows the different swing states of the equalizing suspension mechanism of equalizing-suspension device among Fig. 1 respectively;

Fig. 3 shows the equalizing-suspension device according to the utility model one preferred embodiment, and it is applied in the two-axle semitrailer;

Fig. 4 shows the equalizing suspension mechanism of equalizing-suspension device among Fig. 3;

Fig. 5 A and Fig. 5 B are respectively the pivot angle scope scheme drawing of the different swing states of the equilibrium arm of equalizing suspension mechanism among Fig. 4.

The specific embodiment

See also Fig. 3, Fig. 3 is that it is applied in the two-axle semitrailer according to the equalizing-suspension device of the utility model one preferred embodiment.This equalizing-suspension device is divided into two the equilibrium arm of conventional balanced suspension fork mechanism, thereby has formed later-model equalizing suspension mechanism 14.Compare with the conventional balanced suspension fork mechanism 11 among Fig. 1, the forward horizontal stand arm of equalizing suspension mechanism 14 has kept the preceding half section connection dimension and the structure of conventional balanced arm, own independent rotary pin shaft is arranged, the back balance arm has kept the second half section connection dimension and the structure of conventional balanced arm, and oneself independently rotary pin shaft is also arranged.Increasing a connecting rod between the forward and backward equilibrium arm again connects, bearing pin rotates in certain scope of design in order to keep forward and backward equilibrium arm to center on separately, the connecting rod that increases also is a radial type with being connected of forward and backward equilibrium arm, each connects with a bearing pin, have four hinge-points like this, formed four-bar linkage.

Structure of the present utility model as shown in Figure 4, Fig. 4 shows the equalizing suspension mechanism of equalizing-suspension device among Fig. 3.This mechanism comprises: forward horizontal stand arm 4 has equilibrium arm bearing pin 5, middle spring bracket 6 before forward horizontal stand arm 4 is articulated in by equilibrium arm bearing pin 5 on it; Back balance arm 8 has equilibrium arm bearing pin 5 on it, back balance arm 8 is articulated in spring bracket 7 in the back by equilibrium arm bearing pin 5; Connecting rod 10, it is connected with back balance arm 8 with forward horizontal stand arm 4 respectively by pitman pin 9.

Spring bracket 7 is welded on the frame assembly in preceding middle spring bracket 6 and the back, and forward horizontal stand arm 4 and back balance arm 8 rotate around equilibrium arm bearing pin 5, the enforcement wobbling action; Hinged between forward horizontal stand arm 4 and the back balance arm 8 by connecting rod 10, pitman pin 9 by separately between forward horizontal stand arm 4 and connecting rod 10, back balance arm 8 and the connecting rod 10 is hinged, thereby has formed first end, and the four points of connection such as second end of connecting rod of preceding point of connection, back point of connection, connecting rod.Because the vertical distance H between preceding point of connection and first end and back point of connection equate with vertical distance H between second end, before point of connection and the back horizontal throw L between the point of connection and first end equate with horizontal throw L between second end, formed the special four-bar linkage of parallelogram; The pivot angle of forward horizontal stand arm 4 and back balance arm 8 has remained equidirectional equal angular relation, and connecting rod 10 also remains parallel with the line of two bearing pins 5, remains unanimity with respect to the moment of flexure of two bearing pins 5.

From Fig. 2 A～Fig. 2 C and two kinds of structures of Fig. 4 relatively, the equilibrium arm 1 among Fig. 2 A～Fig. 2 C is designed to the forward horizontal stand arm 4, the back balance arm 8 that are divided into two in Fig. 4.Structure after the improvement, no matter L extends muchly with the lengthening of wheelbase, and the movement relation of forward horizontal stand arm 4, back balance arm 8 remains unanimity, and its intensity also remains unchanged.

Fig. 5 A, Fig. 5 B are respectively the pivot angle scope scheme drawing of equilibrium arm in the equalizing suspension mechanism among Fig. 4.In order to keep its good balance, safety performance, generally the pivot angle with equilibrium arm is limited in the scope, and preferably, the pivot angle scope of forward and backward equilibrium arm is ± 18 °, and when surpassing this scope, structure is with automatic spacing.

The pivot angle scope of forward and backward equilibrium arm is a kind of preferred mode for ± 18 °, actual pivot angle scope can reach ± and 22 °.

The equalizing suspension mechanism of equalizing-suspension device of the present utility model can be used on the two-axle semitrailer flexibly, also can be used on three superimposed trailers or the multiaxis superimposed trailer.When being used in three superimposed trailers, forward and backward wheelbase can be designed to wait wheelbase, also forward and backward wheelbase can be designed to unequally, can be 1800 millimeters (mm) as the wheelbase of preceding two axles of superimposed trailer, the wheelbase of two axles in back can be 1350 millimeters (mm), to satisfy the needs of country variant rules.

The key of the equalizing suspension mechanism of this equalizing-suspension device is: forward horizontal stand arm 4, back balance arm 8 and connecting rod 10 have been formed a kind of four connecting rods, and this four connecting rod for example adopts parallelogram sturcutre.This structure can make the hand of rotation and the angle of forward horizontal stand arm, back balance arm be consistent, and the transmission of moment between the two simultaneously keeps equating, reaches the swing effect that unites two into one.

Claims

1. equalizing suspension mechanism is characterized in that comprising:

Spring bracket in preceding, it is fixed in frame assembly;

Spring bracket in the back, it is fixed in this frame assembly, and along this frame assembly length direction with should before in a spring bracket predetermined distance at interval;

The forward horizontal stand arm, it is connected in this preceding middle spring bracket in hinged way, forms preceding point of connection in the hinged place;

The back balance arm, it is connected in spring bracket in this back in hinged way, forms the back point of connection in the hinged place; With

Connecting rod, it has and this forward horizontal stand arm pivotally attached first end, and with this back balance arm pivotally attached second end.

2. equalizing suspension mechanism as claimed in claim 1 is characterized in that:

First end of this connecting rod and the horizontal throw between second end equal the horizontal throw between this preceding point of connection and this back point of connection; And

Vertical distance before being somebody's turn to do between point of connection and this first end equals the vertical distance between this back point of connection and this second end, thereby forms parallelogram linkage.

3. equalizing suspension mechanism as claimed in claim 1 or 2 is characterized in that this forward horizontal stand arm and this back balance arm and horizontal pivot angle scope up and down are ± 22 °.