Workers and peasants in a certain hand-held tractor factory - "12" walking tractor "Safety speed limit" in the "operating manual" indicate: stand-alone movement speed limit ≤ 7km / h. When going downhill on a steep slope, pinch left to turn right and pinch right to turn left. After long-term practice and analysis of accidents, I believe that the above-mentioned method of steering a downhill tractor is not comprehensive or scientific. Because the concept of the size of the slope is not clear, the steering method is different when the walking tractor is downhill and the slope is relatively large. Therefore, it is necessary to clarify the concept of a small gradient and a relatively large gradient when walking a tractor downhill in theory, so as to help the operator to correctly grasp the steering method of the walking tractor. Ensure safe driving. 1. How does a tractor move downhill? The speed of the walking tractor is V when the downhill slope is set, and the left and right right wheels are V and V=V left=V right. When the slope of the locomotive is larger, the resultant force of the inertia force and the glide force of the locomotive is greater than the gravity of the diesel engine. At this time, the locomotive needs to turn right, and then the operator squeezes the reverse handle (that is, the clutch on the left), and the left side of the locomotive The driving wheel is neutral, V is at the same speed as the locomotive, and the driving wheel on the right side of the locomotive is driven by the traction force. Since the traction force is less than the resultant force of the inertia force and the sliding force of the locomotive, the traction force becomes resistance, and V left =V, so that V is right <V left, at which point the locomotive rotates around the right drive wheel. The locomotive turned right. When the slope of the locomotive is not large, and the resultant force of the locomotive's inertial force and the sliding force is less than the locomotive's traction, the locomotive must turn right. If the hand continues to grip the reverse handle (ie the left clutch). Because the driving wheel on the right side of the locomotive is still driven by traction, V is at the same speed as the locomotive. Because the left driving wheel is neutral, its driving force is only the combined force of the inertia force and the sliding force of the locomotive; V left <V right = V Therefore, the locomotive head rotates around the left drive wheel, causing the locomotive to suddenly turn to the left, which can easily cause accidents. 2. Correct use of method of downhill steering of walking tractor Because of the complex road conditions, it is difficult to distinguish the slope of the tractor. Therefore, when the steering angle of the hand-held tractor is not large, push the handrail to achieve the steering. The stepping brake can be applied to the descending slope of the walking tractor, so that the walking tractor can be in a braking state, and the tractor can be steered by using the method of steering on a flat ground. When confirming that the slope of the road is large (greater than the critical gradient), the steering of the locomotive can be achieved by pinching the reverse steering handle. When confirming that the road gradient is small (less than the critical gradient), the steering of the locomotive can be achieved by pinching the steering handle in the same direction. Spice Novelties Co.,Limited , https://www.wholesale-adult-toys.cn