| 摘要 |
FIELD: machine engineering, namely percussion-action pneumatic machines. ^ SUBSTANCE: machine includes housing where metallic trunk is arranged; striker arranged in trunk with possibility of axial motion for dividing truck by chambers of forward and back strokes; bushing; mechanism for air distributing; handle; shock absorber of soft elastomer mounted inside handle. Air distributing mechanism has supplying, forward pumping and backward pumping ducts. Protection casing is arranged on housing with annular cavity between them. Trunk has at least three links telescopically mounted with possibility of relative axial motion without mutual striking and cast with impact-resistant elastomer forming housing. Ducts formed in walls of housing are designed for communication with forward-stroke chamber; other ducts are designed for communication at one side with back-stroke chamber and at other side with pumping reverse ducts of air distributing mechanism. Third ducts are designed for communication with said annular cavity. Bushing, air-distributing mechanism, protection casing and handle are made of impact-resistant different rigidity elastomer. ^ EFFECT: improved design providing vibration resistance, lowered noise level, enhanced operational efficiency, lowered mass of machine. ^ 3 cl, 3 dwg |
