公开(公告)号：US5195760A

公开(公告)日：1993-03-23

申请号：US537038

申请日：1990-06-12

申请人： Dale K. Wheeler ,  Charles W. Coleman

发明人： Dale K. Wheeler ,  Charles W. Coleman

IPC分类号： B23B31/107 ,  B23B31/12

CPC分类号： B23B31/1253 ,  Y10S279/902 ,  Y10T279/17615

摘要： A keyless chuck (10; 301) comprises a jaw housing (28; 303) with jaws (32; 333, 335, 337 ) which are slidably mounted in guideways (40; 319, 321, 323) between a rearward opened position and a forward closed position. A jaw thrust member (34; 345) is coupled to the jaws and is slidably mounted in the jaw housing to apply a thrust force to the jaws and to maintain the jaws in the same relative axial location. A nut (42; 355) is fixed to the jaw housing and has a threaded opening (46; 357) coaxial with the chuck axis (A.sub.x). A threaded spindle (48; 305) is engaged in the nut opening and is movable forwardly to apply clamping force to the jaws and rearwardly to remove clamping force. The spindle preferably engages the jaw thrust member through a small area contact patch (72; 401) to limit operating friction. The jaws either may be opened and closed responsive to rearward and forward movement of the spindle respectively or to simplify loading of a bit in the chuck, may be spring biased forwardly to a closed position (self-centering) and thus not movable responsive to movement of the spindle. A lock mechanism (22, 104, 42; 309) is preferably provided to limit relative rotation between the nut and spindle to prevent the application of excessive clamping force and to limit removal of clamping force. The lock mechanism also preferably permits incremental self-tightening when in the locked position through an automatic tightener (397) and through the sizing and spacing of two sets of teeth (373, 375) to limit the application and removal of clamping force on a drill bit. To limit the run out in a finished chuck, deformable (during assembly) interfaces (204; 401) are preferably provided between the jaw housing and nut and between the spindle and jaw thrust member (stop). To further enhance the accuracy of assembly and to reduce run out, the spindle and nut preferably have a smoothed walled interface (415, 417) to accurately control coaxial alignment of the nut and spindle.

公开(公告)号：US4848779A

公开(公告)日：1989-07-18

申请号：US033328

申请日：1987-04-02

申请人： Dale K. Wheeler ,  Charles W. Coleman

发明人： Dale K. Wheeler ,  Charles W. Coleman

IPC分类号： B23B31/173 ,  B23B31/12

CPC分类号： B23B31/123 ,  B23B31/1253 ,  Y10S279/902 ,  Y10T279/17615 ,  Y10T279/17658

摘要： A keyless chuck includes a jaw housing with jaws that are advanced in respective guideways to grip a tool bit and retracted to loosen the grip on the tool bit. A jaw thrust member is coupled to the jaws and to a threaded spindle and is forced forwardly or rearwardly to advance or retract the jaws. The threaded chuck spindle engages the jaw thrust member through a small-area contact patch to limit the operating friction and thus provide a chuck which can be readily hand-tightened and which self-tightens in response to torque transmitted through the chuck. A lock mechanism is provided to selectively lock a chuck adjusting sleeve relative to the jaw housing to allow uni-directional movement of the chuck adjusting sleeve relative to the jaw housing or selective bi-directional locking of the chuck adjusting sleeve relative to the jaw housing. The lock mechanism includes a lock plate coupled to a chuck adjusting sleeve and includes a set of teeth on an axial face for engagement with complementary teeth on an axial face of the chuck adjusting nut. The lock plate is normally spring-biased into engagement with the chuck adjusting nut and can be disengaged from the chuck adjusting nut to temporarily disable the locking mechanism. The keyless chuck is assembled in such a way that the run-out of the finished chuck is minimal.

摘要翻译： 无钥匙卡盘包括具有钳口的钳口壳体，钳口壳体在相应的导轨中前进以夹持工具头并缩回以松开刀具上的把手。 钳口推动构件联接到钳口和螺纹心轴并且被迫向前或向后以推进或缩回钳口。 螺纹卡盘主轴通过小面积接触片接合夹爪推动构件，以限制操作摩擦，从而提供可以容易地手动拧紧的卡盘，以及响应于通过卡盘传递的扭矩而自我紧固的卡盘。 提供锁定机构以选择性地相对于钳口壳体锁定卡盘调节套筒，以允许卡盘调节套筒相对于钳口壳体的单向运动或卡盘调节套筒相对于钳口壳体的选择性双向锁定。 锁定机构包括联接到卡盘调节套筒的锁定板，并且在轴向面上包括一组齿，用于与卡盘调节螺母的轴向表面上的互补齿啮合。 锁板通常被弹簧偏置成与卡盘调节螺母接合，并且可以从卡盘调节螺母脱离，以暂时禁用锁定机构。 无钥匙卡盘的组装方式使得成品卡盘的流出量最小。