CN204383614U - Operator's compartment is floating suspending apparatus entirely - Google Patents

Abstract

The utility model discloses a full-floating suspension device for a driver's cab, which relates to the technical field of automobile manufacturing, and comprises two groups of front suspension components and two groups of rear suspension components. Support, the other end of the swing arm is hinged with the front suspension upper support, the front suspension shock absorber is connected between the swing arm connection and the outer wall of the front suspension upper support, the upper end of the swing arm is provided with a limit block, the limit block set There are coil springs with two ends in contact with the swing arm and the upper support of the front suspension respectively; the front end of the longitudinal beam of the cab has a bent limit rib; the swing arms of the two sets of front suspension components are connected by a transverse stabilizer bar , the upper parts of the two front suspension lower supports are bent in directions away from each other. Compared with the prior art, the utility model adopts a four-point full-floating suspension in the medium-sized commercial vehicle, which has a good vibration isolation effect, and the ride comfort and reliability of the cab are quite stable, and the structure is simple and compact, which is beneficial to save space Arrange the space.

Description

Cab full suspension device

technical field

The utility model relates to the technical field of automobile manufacturing, in particular to a suspension device applied to a cab of a medium-sized commercial vehicle.

Background technique

During the driving process of the vehicle, the impact of the road surface is transmitted to the cab through the chassis of the car to generate vibration, which will cause discomfort and fatigue to the occupants. In order to improve the ride comfort of the vehicle and make the ride more comfortable, usually a There is a suspension device for vibration reduction, so that the cab is suspended on the frame. The existing medium-sized commercial vehicle suspension devices all adopt semi-suspension suspension. The two support points at the front of the cab are fixed connections of two sets of front suspension components using rubber vibration isolation pads. The two support points at the rear end of the cab The first support point is a floating connection of two sets of rear suspension components including spring damping elements. The suspension device of this structure can achieve a certain vibration isolation effect, but the rubber pad suspension of the front support point of the cab is due to its The vibration damping is too small and the dynamic stiffness is large, which reduces the overall vibration isolation effect of the suspension device, and the ride comfort of the vehicle is not good, which cannot meet people's requirements for ride comfort.

Utility model content

The purpose of the utility model is to provide a cab full-floating suspension device, which can solve the problems of poor vibration isolation effect and poor driving comfort in the existing semi-floating suspension devices of medium-sized commercial vehicles.

In order to solve the above problems, the technical solution adopted by the utility model is: the cab full-floating suspension device includes two sets of front suspension assemblies and two sets of rear suspension assemblies respectively connected between the vehicle frames on both sides and the longitudinal beams of the cab Each group of said front suspension components includes a front suspension upper support connected to the cab longitudinal beam and a front suspension lower support fixed to the outer wall of the vehicle frame, the upper end of the front suspension lower support is hinged with Swing arm, the other end of the swing arm is hinged with the upper support of the front suspension, the swing arm is connected with a front suspension shock absorber inclined along the length direction of the vehicle frame, the front suspension shock absorber The other end is connected with the upper support of the front suspension, and the upper end surface of the swing arm is provided with an upwardly protruding limit block, and the limit block is sleeved with a coil spring, and the two ends of the coil spring are respectively connected with the The swing arm is in contact with the front suspension upper support; the front suspension upper support has a bottom plate and a side plate arranged outside the bottom plate, the side plate is in contact with the outer side wall of the cab longitudinal beam, One end of the front suspension shock absorber is connected to the outer wall of the side plate of the front suspension upper support, the other end is connected to the outer side of the swing arm, and the front end of the cab longitudinal beam has a bent limit stop Side; the swing arms of the two groups of front suspension assemblies are connected through a stabilizer bar, and the upper parts of the two front suspension lower supports are bent in directions away from each other.

In the technical solution of the above-mentioned cab full-floating suspension device, a more specific technical solution may also be: each set of the rear suspension assembly includes a rear suspension upper support connected to the cab longitudinal beam and fixed to the vehicle The rear suspension lower bracket on the outer wall of the frame, the upper end of the rear suspension upper bracket is connected with a horizontally arranged hydraulic lock installation frame, and the other end of the hydraulic lock installation frame is connected with an inclined rear suspension shock absorber. The other end of the suspension damper is connected to the lower end of the rear suspension lower bracket; the hydraulic lock mounting frame is equipped with a hydraulic lock, and the rear suspension upper support is connected to the hydraulic lock mounting frame; The upper part of the rear suspension lower bracket of the above-mentioned rear suspension assembly is bent inward and opposite to each other.

Further, the stiffness of the coil spring is 25-70 N/mm; the damping coefficient of the front suspension shock absorber is 0.8-3.5 N·s/m, and the damping force is 300-4000 N; The damping coefficient of the vibrator is 0.8-3.5 N·s/m, and the damping force is 300-4000 N.

Further, the curved surface shapes of the front suspension lower support, the swing arm and the rear suspension lower support are obtained through topology optimization.

Due to the adoption of the above technical solution, the utility model has the following beneficial effects compared with the prior art:

1. The front suspension of the utility model adopts components such as coil springs and shock absorbers that can greatly absorb shocks and attenuate vibrations, so that the cab suspension of medium-sized commercial vehicles is improved from the original semi-floating suspension to four-point full floating The suspension has good vibration isolation effect, which improves the driving vibration performance of medium-sized commercial vehicles and improves the driving comfort.

2. The swing arm is directly hinged with the upper outwardly bent front suspension lower support, the two ends of the front suspension shock absorber are connected to the side wall of the swing arm and the outer side plate of the front suspension upper support, and the structural design such as the abutment of the two ends of the coil spring can be Avoid the problem of poor comfort caused by coupling, improve the decoupling rate, make the ride comfort and reliability of the cab quite stable, and the structure is simple and compact, which is conducive to saving space and layout space.

3. The oblique setting of the rear suspension shock absorber can attenuate vertical vibration and lateral braking. The setting of the hydraulic lock mounting frame makes it form a triangle installation with the rear suspension lower bracket and the rear suspension shock absorber, which is conducive to improving reliability.

4. Limit the stiffness of the coil spring, and adjust the damping force and damping coefficient of the front and rear suspension shock absorbers to optimize the damping curve, so as to improve driving comfort and reduce the fatigue of drivers and passengers.

5. The suspension bracket of the cab adopts topology optimization, which can reduce the self-weight under the premise of meeting the quality requirements, so as to reduce the cost.

Description of drawings

Fig. 1 is a structural schematic diagram of the cab suspension device.

detailed description

Below in conjunction with accompanying drawing embodiment the utility model is described in further detail:

The cab full-floating suspension device shown in Fig. 1 mainly includes two sets of front suspension assemblies 2, two sets of rear suspension assemblies 5 and a stabilizer bar 3 connecting the two sets of front suspension assemblies 2, the front suspension assemblies 2 and the rear suspension assemblies 5 They are respectively connected to the four ends between the vehicle frame 1 on both sides and the longitudinal beam 4 of the cab to form a four-point full suspension. Each group of front suspension components 2 includes a front suspension upper support 21, a coil spring 22, a front suspension lower support 24, a front suspension shock absorber 25 and a swing arm 26, wherein the front suspension upper support 21 and the cab longitudinal The beam 4 is connected, the front suspension lower support 24 is fixedly installed on the outer side wall of the vehicle frame 1, the upper part of the front suspension lower support 24 is bent outward, and the front suspension upper support 21 has a bottom plate and a side plate 211 arranged on the outside of the bottom plate , the side plate 211 is against the outer side wall of the cab longitudinal beam 4, the bottom of the bottom plate is provided with a lug hinged with the swing arm, the other end of the swing arm 26 is hinged with the upper end of the front suspension lower support 24, the swing arm 26 Both ends are fork structures, and the lugs of the upper front suspension support 21 and the upper ends of the lower front suspension support 24 are respectively placed between the fork bodies at both ends of the swing arm 26; Limiting block 23, the limiting block 23 is set with a helical spring 22, and the two ends of the helical spring 22 abut against the swing arm 26 and the front suspension upper support 21 respectively; The inclined front suspension shock absorber 25, the other end of the front suspension shock absorber 25 is connected to the outer wall of the side plate 211 of the front suspension upper support 21, and there is a bent limit rib 41 at the front end of the longitudinal beam 4 of the cab , used to limit the front suspension upper support 21 and the front suspension shock absorber 25; the two ends of the stabilizer bar 3 are connected with the swing arms 26 of the two groups of front suspension components 2 respectively, The upper part of 24 is bent in a direction away from each other; preferably, the stiffness of the coil spring 22 is 25-70 N/mm; the front suspension shock absorber 25 adopts a double suspension ring structure shock absorber, and its damping coefficient is 0.8-3.5 N.s /m, the damping force is 300-4000 N. Each group of rear suspension components 5 includes a rear suspension upper support 51, a hydraulic lock 52, a hydraulic lock mounting frame 53, a rear suspension shock absorber 54, and a rear suspension lower bracket 55. The side mounting plates on the two side walls of the longitudinal beam 4 and the two facing lugs face downward and are perpendicular to the cab longitudinal beam 4, and a horizontally arranged hydraulic pressure is connected between the lugs of the rear suspension upper support 51. The lock mounting frame 53 and the hydraulic lock 52 are installed in the hydraulic lock mounting frame 52. One end of the hydraulic lock mounting frame 52 is connected with the upper end of the rear suspension lower bracket 55, and the other end is connected with the rear suspension shock absorber 54; the rear suspension lower bracket 55 The lower part of the lower part is fixedly installed on the outer side wall of the vehicle frame 1, and the upper part is bent inwardly, and the upper parts of the rear suspension lower brackets 55 of the two groups of rear suspension components 5 are bent inward, and the upper ends of the rear suspension lower brackets 55 are connected to the rear suspension shock absorbers 54. The other ends are connected so that the hydraulic lock mounting frame 53, the rear suspension shock absorber 54 and the rear suspension lower bracket 55 are installed to form a closed triangle; preferably, the rear suspension shock absorber 54 adopts a double suspension ring structure shock absorber, and its damping coefficient 0.8-3.5 Newton·s/m, and the damping force is 300-4000 Newton. It is worth mentioning that the curved surface shapes of the front suspension lower support 24 , the swing arm 26 and the rear suspension lower support 55 are obtained through topology optimization to reduce dead weight and cost.

The product of the utility model has been verified by the Hainan strengthened bad road test with the whole vehicle. After the test, the ride comfort of the whole vehicle is very small compared with that before the test, and the ride comfort and reliability are quite stable. At the same time, it has been verified by mass production tracking tests that the ride comfort effect of the vehicle is stable, and a good ride ride improvement effect has been achieved. the

Claims (4)

1. an operator's compartment floating suspending apparatus entirely, comprise and be connected to two groups of front overhang assemblies between both sides vehicle frame and operator's compartment longeron and two groups of rear overhang assemblies, it is characterized in that: often organize described front overhang assembly and comprise the front overhang upper bracket be connected with described operator's compartment longeron and the front overhang undersetting being fixed on described frame outside wall, the upper end thereof of described front overhang undersetting has swing arm, the other end and the described front overhang upper bracket of described swing arm are hinged, described swing arm is connected with the front overhang shock absorber tilted along described vehicle frame length direction, the other end of described front overhang shock absorber is connected with described front overhang upper bracket, the upper surface of described swing arm is provided with a limiting stopper raised up, described limiting stopper is set with coil spring, described helical spring two ends abut against with described swing arm and described front overhang upper bracket respectively, described front overhang upper bracket has base plate and is located at the side plate of described plate outer side, the lateral wall of described side plate and described operator's compartment longeron offsets, one end of described front overhang shock absorber is connected to the outer wall of the side plate of described front overhang upper bracket, the other end is connected to the outside of described swing arm, and the front end of described operator's compartment longeron has the spacing rib of bending, described in two groups, the described swing arm of front overhang assembly is connected by Panhard rod, and the top of two described front overhang undersettings is bending to the direction mutually deviated from.

2. operator's compartment according to claim 1 floating suspending apparatus entirely, it is characterized in that: often organize described rear overhang assembly and comprise the rear overhang upper bracket be connected with described operator's compartment longeron and the rear overhang lower bracket being fixed on described frame outside wall, the upper end of described rear overhang upper bracket is connected with the hydraulic lock erecting frame of horizontally set, the other end of described hydraulic lock erecting frame is connected with the rear overhang shock absorber be obliquely installed, and the other end of described rear overhang shock absorber is connected with the lower end of described rear overhang lower bracket; Described hydraulic lock erecting frame is provided with hydraulic lock, and described rear overhang upper bracket is connected with described hydraulic lock erecting frame; The rear overhang lower bracket top of rear overhang assembly described in two groups inwardly bends in opposite directions.

3. operator's compartment according to claim 1 and 2 floating suspending apparatus entirely, is characterized in that: described helical spring rigidity is 25 ~ 70 Ns/millimeter; The damping coefficient of described front overhang shock absorber is 0.8 ~ 3.5 Newton-second/rice, and dumping force is 300 ~ 4000 Ns; The damping coefficient of described rear overhang shock absorber is 0.8 ~ 3.5 Newton-second/rice, and dumping force is 300 ~ 4000 Ns.

4. operator's compartment according to claim 3 floating suspending apparatus entirely, is characterized in that: the curve form of described front overhang undersetting, described swing arm and described rear overhang lower bracket is obtained by topological optimization.