渐开线直齿圆柱齿轮的啮合传动ppt课件

JM 返回返回pb2pb2pb2pb1pb1pb2pb1=pb2pb1pb1rb1r1O111rb2r2O222rb1r1O111rb1r1O111rb2r2O222rb2r2O2 2 2PN1N2B2B1PN1N2B2B1PN1N2B1B2m1m2JM 返回返回 要使进入啮合区内的各对齿轮都能正确地进入啮合，两齿要使进入啮合区内的各对齿轮都能正确地进入啮合，两齿轮的相邻两齿同侧齿廓间的法向间隔应相等：轮的相邻两齿同侧齿廓间的法向间隔应相等：pb2pb1rb2r2O2rb1r1O11122PN1N2B2B1JM 返回返回a=r1+r2=r1+r2r1=r1r2=r2=r2/r1规范中心距规范中心距JM 返回返回rb2r2O2r1O11122PN1N2rb1ra1ra1rf2rf2caa a O1rb2r2O2r11122PN2rb1ra1rf2N1r2r1=r b 1rb2JM 返回返回r1N2v22比较得：比较得：O11N1rf1ra111=N2v22r1O11N1rf1ra111B1B2=B1B2PPr1=r1 JM 返回返回 N1N2O1rb1Prb22211O2ra1ra2B1B2N2N1JM 返回返回O1N2N1KO22211pbB1B2 令令=B1B2/pb =B1B2/pb ，为一对齿轮的重合为一对齿轮的重合度度 的引荐值：的引荐值：JM 返回返回a2N1N2O1rb1rb2O2P PB2 PB2B2 N2-PN2B2 N2-PN2B2ra2ra1B1a1JM 返回返回PN1O1h*amB1B2a1JM 返回返回a1a2a2 B1B2 B1B2B2B1JM 返回返回Pmax=(PB1+PB2)/pbmax=(PB1+PB2)/pbPB1PB1PB2PB2=4 ha=4 ha*/sin2/sin2h*ammax=1.981,max=1.981,haha*m/sinm/sinB1B2=2 ha=2 ha*m/(sinmcos)m/(sinmcos)