关键词: 旋转式牛体刷, 奶牛, 双向摆动, 畜禽养殖

Abstract: In view of the fact that in the process of domestic dairy farming, the surface of the cow body is often bonded with dirt, feces and other dirt, which is easy to breed parasites, resulting in inflammation and disease of dairy cows, and affecting milk production, a 9NTB type twoway swing rotary cow body brush is designed by summarizing the research status of cow body brushes at home and abroad. The device is composed of a mounting base, a rotating articulation Ⅰ, an Lshaped support, a decelerating motor, a rotating articulation Ⅱ and a rolling brush. Based on the analysis of the height and body shape of dairy cows, the parameters of Lshaped support were determined as follows: length 0.9 m, width 0.6 m, and the height of the mounting base was 2.22 m from the ground. Through the calculation and analysis of the deformation force of the bristles and the shear force of the mud, nylon was selected as the bristle material, and the length of the bristles was determined to be 135 mm, the outer diameter of the rolling brush was 440 mm, the height was 600 mm, and the working speed of the rolling brush was determined to be 24 r/min. The friction force of the cow was checked, the maximum power consumption was 169.45 W, and the corresponding gear motor was selected. The experiment shows that the brush can swing in two planes, can meet the needs of the brush, and can effectively clean the head, back and side of the cow body. The cleanliness score is reduced from 3.4 to 1.6, and the operation effect is good.

Key words: rotating cattle body brush, cows, bidirectional swing, livestock and poultry breeding