CN102452291A

CN102452291A - Vibration-reducing and energy-absorbing type transverse thrust rod

Info

Publication number: CN102452291A
Application number: CN2010105177476A
Authority: CN
Inventors: 刘义; 李保权; 马一鸣; 周长海
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2010-10-25
Filing date: 2010-10-25
Publication date: 2012-05-16

Abstract

The invention relates to a vibration-reducing and energy-absorbing type transverse thrust rod, characterized in that a counterweight is additionally arranged on the end part of the transverse thrust rod, a hollow tube is welded on an outer sleeve of an end lining, a counterweight block is additionally arranged in a position 1/4 in length to the end part, and the counterweight block is a square solid iron block welded at the lower part of the transverse thrust rod. The transverse thrust rod reduces rigid-body vibration namely natural vibration of 84Hz when the vehicle speed is 120km/hour, and for an entire vehicle, the noise in the vehicle can be reduced by 84Hz.

Description

The energy-absorbing type lateral rod that shakes falls

Technical field

The present invention relates to a kind of energy-absorbing type lateral rod that shakes that falls, be applicable to the suspension system field on vehicle chassis such as minicar, MPV, SUV.

Background technology

Than steel spring formula suspension, the ride comfort of many link-types suspension is better, and weight is lighter.Single with regard to elastic element, helical spring cost lacks than steel spring, and its rigidity value to calculate accuracy higher, weak point is: the cost of multi-link lever suspension fork assembly is higher than steel spring suspension assembly.

Many link-types suspension can be divided into according to the difference of its structure: three connecting rods, four connecting rods and five connecting rods; For three link lever suspension forks, three longitudinal rods have been controlled vehicle bridge and have been moved longitudinally, the application force when transmitting braking and cycling start.Lateral rod gets up vehicle bridge and body contact, transmits horizontal application force.The vehicle of using this kind suspension has Ford, Mercury, white partridge in history.For four link lever suspension forks, lateral rod is omitted, and has increased the 4th longitudinal rod, so suspension system has possessed two upper thrust rods and two lower thrust rods.They link to each other with vehicle body with vehicle bridge through rubber bush, and under the effect of load, rubber bush can deform.The vehicle of using this kind suspension has Cadillac in history, Ao Erzi Mobile, Pang Diyake.For five link lever suspension forks, be equivalent to four link lever suspension forks and add lateral rod, lateral rod bears side force, and four trailing arms bear lock torque and longitudinal force, and coil spring is supported on the trailing arm, and trailing arm also bears vertical load.

Summary of the invention

The object of the present invention is to provide a kind of energy-absorbing type lateral rod that shakes that falls; It is on the rear suspension of automobile; Increase by two place's counterweights, and the upper arm of back five connecting rod dependent suspensions is arranged to acute angle to each other, make that back axle has understeer characteristics when turning to; Stiffness characteristics through optimizing the hinged place lining has improved the car load ride comfort, has improved the car load traveling comfort; Through to its modal test that carries out and car load vibration test, result's proof can significantly be reduced under a certain speed of a motor vehicle vibration and the noise that is reached vehicle body by propelling rod.

Technical scheme of the present invention is achieved in that falls the energy-absorbing type lateral rod that shakes; It is characterized in that: the end at lateral rod installs counterweight additional; Welding one hollow tubular on the lining outer tube of end; Position in 1/4 length apart from the end installs clump weight additional, and clump weight is the bottom that square solid iron is welded on lateral rod.

Good effect of the present invention is the vibration of the rigid body up and down characteristic oscillation that has reduced the 84Hz when speed of a motor vehicle 120km/h; For car load, can reduce the noise of 84Hz in the car.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 does not have the counterweight of installing additional lateral rod rumble spectrum figure at present for uniform movement.

Fig. 3 installs counterweight lateral rod rumble spectrum figure at present additional for uniform movement.

Fig. 4 installs counterweight lateral rod rumble spectrum figure at present additional for accelerated movement.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is done further description: as shown in Figure 1; The energy-absorbing type lateral rod that shakes falls; It is characterized in that: the end at lateral rod installs counterweight additional; Welding one hollow tubular installs counterweight additional in the position of 1/4 length apart from the end on the lining outer tube of end, and counterweight is the bottom that square solid iron is welded on lateral rod.

Shown in Fig. 2-4,On lateral rod, arrange 8 ICP type vibration measurement sensors, the output of sensor is linked into LMS modal analysis equipment (being used for modal test) respectively and number is adopted front end (being used for the car load vibration test).The method that employing power hammer knocks, operating condition of test is respectively the car load restrained condition and freely hangs state.At the uniform velocity go, give it the gun at the high loop of farming peace test area; Go by the proof ground test requirement specification on the 2# road.

Conclusion (of pressure testing):

Modal test:

1) rigid body mode:

After removing counterweight, the rigid body oscillation frequency of propelling rod raises to some extent, and translation frequency up and down becomes 83.9Hz from 74.87Hz, belongs to normal mobility scale;

2) elasticity mode:

Have, during no counterweight, under the whole vehicle state, the single order elasticity mode of propelling rod does not change, under the free state, all elasticity model frequencies have rising to a certain degree, consider relevantly with the quality reduction of bar, belong to normal mobility scale.

Road operation test:

1) at the uniform velocity go:

See from the rumble spectrum of propelling rod; During no counterweight, there is the composition greater than 80Hz in the oscillation frequency peak value of propelling rod, install counterweight additional after; It is as shown in Figure 2 that the rumble spectrum of propelling rod concentrates on 60～80Hz, can reduce near the vibration of propelling rod 80Hz so install counterweight additional; As shown in Figure 3;

2) give it the gun:

See that from the accelerating curve contrast of propelling rod vibration when not having counterweight, near engine speed 4000RPM (speed of a motor vehicle 120km/h), there is obvious peak value in the propelling rod vibration, then do not have peak value after installing counterweight additional; When hanging down the speed of a motor vehicle, remove the propelling rod vibration of counterweight and instead vibrate little as shown in Figure 4 than the propelling rod that counterweight is arranged; But vibrate from the propelling rod rigid body mode, this frequency range does not belong to the resonance section, so do not consider.

Claims

1. the energy-absorbing type lateral rod that shakes falls; It is characterized in that: the end at lateral rod installs counterweight additional; Welding one hollow tubular installs clump weight additional in the position of 1/4 length apart from the end on the lining outer tube of end, and clump weight is the bottom that square solid iron is welded on lateral rod.