This article introduces the history and development of log grapple in China.Ac-cording to the special conditions of Chinese forest areas,we have selected log grapple driven byelectric drum,and have analyzed and calcul...This article introduces the history and development of log grapple in China.Ac-cording to the special conditions of Chinese forest areas,we have selected log grapple driven byelectric drum,and have analyzed and calculated its parameters theoretically.This is the first loggrapple driven by an electric drum made successfully in China.The Model DZ1 log grapple has alarge closing force,works safely and is suitable for the special forest working conditions inChina.展开更多
This paper study on grabbing moving resistance and performance of double-power screw driving grapple with vibration in the grabbing logs. Applying the vibration mechanism can reduce the grabbing moving resistance when...This paper study on grabbing moving resistance and performance of double-power screw driving grapple with vibration in the grabbing logs. Applying the vibration mechanism can reduce the grabbing moving resistance when the grapple grabs logs. According to this principle, we have developed the contruction of this double-power screw driving grapple with vibration. It has great significance for increasing efficiency and decreasing dead-weight of grapple(grab bucket).展开更多
文摘This article introduces the history and development of log grapple in China.Ac-cording to the special conditions of Chinese forest areas,we have selected log grapple driven byelectric drum,and have analyzed and calculated its parameters theoretically.This is the first loggrapple driven by an electric drum made successfully in China.The Model DZ1 log grapple has alarge closing force,works safely and is suitable for the special forest working conditions inChina.
文摘This paper study on grabbing moving resistance and performance of double-power screw driving grapple with vibration in the grabbing logs. Applying the vibration mechanism can reduce the grabbing moving resistance when the grapple grabs logs. According to this principle, we have developed the contruction of this double-power screw driving grapple with vibration. It has great significance for increasing efficiency and decreasing dead-weight of grapple(grab bucket).