Mini tractor vibration handle research

 

   Keywords tractor freedom handlebar vibration damping system damping performance

 

  CLC: S219. 609

 

    Mini tractor is a small one of the main models of agricultural tractors, it is, "pan used for short-distance transport of field operations and villages because of the small mass of miniature tractor, no elastic supports, but most of the current mini-hand Tractor handle are rigidly connected with the body approximation, without special vibration design, so the vibration caused by the engine vibration handle quite serious, thus reducing the driver's NPC efficiency and harmful to their health, so how to reduce Small mini tractor vibration handle the majority of agricultural science and technology workers has become an important research topic ... The existing handlebar vibration There are several ways, such as in certain parts of the tractor frame on hand plus mass stiffness and lower frame rails, etc., to some extent, some of the results obtained, but the quality of the block is added to achieve the damping effect, requires a larger mass, and reduce the rigidity of frame rails and more troublesome, so not promote the use of To this end this paper ~ kind of simple structure of the new vibration handle, and its theoretical and experimental analysis, results show that the vibration damping handle has a good performance.

 

   A theoretical analysis

 

    Miniature tractor vibration handle by two springs and two round bar-like masses in series and the outer sleeve, whose structure diagram shown in Figure 1. It is composed of an infinite number of degrees of freedom of the continuous vibration system, but appears as miniature tractor handlebar 16 corresponding maximum vibration acceleration.

 

Relatively low frequency excitation is usually a secondary engine vibration frequency component, the 2n/60Hz component (n-tractor engine speed). Therefore, in order to facilitate theoretical analysis, the paper put it into discrete shown in Figure 2 by the two springs and no quality rod composed of two mass 2 degrees of freedom vibration system.

 

    2 Experimental results and analysis

 

  Driving mini hand tractor, manpower comes mainly from the discomfort of the incentive engine vibration damping handle so this vibration test indoors. Use miniature tractor: Taurus 3PS (Rong agricultural machinery plant products), test equipment: dual-channel acceleration vibrometer. Engine speed from 2 lOOr / m starts every lOOr / rn measured once. Test block diagram shown in Figure 4. For comparison, the same time measuring the vibration acceleration of the original handlebar. Test results shown in Figure 5.