发明名称 CONICAL SURFACE FRICTION TYPE OVERRUNNING CLUTCH
摘要 A conical surface friction type overrunning clutch includes a first intermediate ring and a second intermediate ring which are provided between an inner ring and an outer ring, and force amplifying transmission mechanisms are connected respectively to conical surface friction pairs. All of the force amplifying transmission mechanisms and the conical surface friction pairs operate within a parameter scope in which they would not lock themselves, the force amplifying transmission mechanisms are in a constant engaged state, and the conical surface friction pairs exert an initial press via an elastic pre-tightening part or a magnetic member. When tangential external component forces in different directions are generated between the inner ring and the outer ring, the conical surface friction pairs are sliding or stay in a stationary state under the action of the force amplifying transmission mechanism, thus the functions of overrunning and self-locking of the overrunning clutch are realized.
申请公布号 US2015204394(A1) 申请公布日期 2015.07.23
申请号 US201314413546 申请日期 2013.06.13
申请人 Chongqing DynRun Machinery Co., Ltd. 发明人 Luo Jun;Liu Jin
分类号 F16D41/061 主分类号 F16D41/061
代理机构 代理人
主权项 1. A conical surface friction type overrunning clutch, comprising: an inner ring, an outer ring, a first intermediate ring, a second intermediate ring, and an elastic pre-tightening member; wherein, the inner ring, the outer ring, the first intermediate ring and the second intermediate ring have a common rotation axis; the first intermediate ring and the second intermediate ring are both located between the inner ring and the outer ring; the first intermediate ring and the second intermediate ring each cooperates with one of the inner ring and the outer ring via conical surfaces, to respectively form at least one first working friction pair and at least one second working friction pair which are both axially engageable and disengageable; and a first force amplifying transmission mechanism and a second force amplifying transmission mechanism are respectively formed between the first intermediate ring and the other one of the inner ring and the outer ring and between the second intermediate ring and the other one of the inner ring and the outer ring, and the first intermediate ring and the second intermediate ring are respectively connected to the other one of the inner ring and the outer ring via the first force amplifying transmission mechanism and the second force amplifying transmission mechanism; the elastic pre-tightening member has one end arranged on the first intermediate ring or the second intermediate ring, to allow all the working friction pairs to maintain an elastic pressing force which meets a working requirement when the working friction pairs are not working; the first working friction pair and the second working friction pair have a common rotation axis, and two conical surfaces of each working friction pair that cooperate with each other have equal cone apex angles; for the cone apex angle of any one of the working friction pairs, the cone apex angle referred to as θ and a friction coefficient of the friction pair referred to as μ0 must satisfy a condition of 2arctan(μ0)<θ≦180°, wherein arctan () in the formula represents arctangent function, and the condition is to ensure that self lock of the working friction pair will not occur; at least one of the force amplifying transmission mechanisms is configured to convert a relative rotation angle between the respective intermediate ring and the inner ring or the outer ring which is connected to the force amplifying transmission mechanism to an axial relative displacement, and in a case that the relative rotation angle is Φ, and the generated axial relative displacement is λ, and the friction coefficient of the force amplifying transmission mechanism is μ1, a condition of arctan(dλ/dΦ)>arctan(μ1) must be satisfied, wherein arctan() in the formula represents arctangent function, and d represents differential, and the condition is to ensure that self lock of the force amplifying transmission mechanism will not occur; and in a case that the first working friction pair and the second working friction pair are converted to a theoretically equivalent working friction pair, a tangential external component force in a direction of self lock occurred between the inner ring and the outer ring is F1, and a normal pressure generated on the equivalent working friction pair by an action of the force amplifying transmission mechanism is F2, an equivalent friction coefficient of the equivalent working friction pair is μ, and a design condition for the overrunning clutch to realize a maximum bearing capacity is dF1/dF2≦μ; and a design condition for the overrunning clutch to achieve overload slipping protection is dF1/dF2>μ, wherein d in the formula represents differential.
地址 Chongqing CN