摘要:
A clutch (1) for an agricultural implement comprises a rotating unit (2) for connection to a powered shaft (3), a selectively disengageable unit (4), a zero-backlash torque limiter (5) operable in an engaged position where a biased plunger (7) is housed in a seat (8) to angularly connect rotating unit (2) and selectively disengageable unit (4) for torque transfer until a maximum torque level is reached; and in a disengaged position where the plunger (7) is retracted outside the seat (8). Further, a safety occlusion mechanism (6) is foreseen having an obstructing element (9) selectively movable in an obstructing position to hinder the seat (8) to house plunger (7) and in a release position to allow shape coupling when the plunger (7) and the seat (8) overlap. The occlusion mechanism (6) is biased to switch in the obstructing position and the release position is instated by an operator.
摘要:
Disengaging overload clutch, having a clutch hub (2) and a pressure flange (1) which is mounted rotatably thereon and in which transmission bodies (3) are arranged which are held in the recesses (7) of the pressure flange (1) by way of the force of spring elements (9) and transmit the torque from the pressure flange (1) to the clutch hub (2). In the case of overload between the clutch hub (2) and the pressure flange (1), the clutch moves in a first rotational direction D1 into a disengaged state, wherein the relatching takes place by way of a rotation between the clutch hub (2) and the pressure flange (1) in a second opposite rotational direction D2, to be precise via the interaction between the control pins (16), the control cams (18) which are connected to the clutch hub (2), and further control grooves (17) with groove flanks (34). According to the invention, the control pins (16) are fitted with pin magnets (19) which are pressed away from control magnets (20) of identical polarity which are provided on the clutch hub (2), in order to bring the control pins (16) into engagement with the control cams (18) and the control grooves (17).
摘要:
A power tool includes a housing (302); a motor (306) supported in the housing (302); a multistage transmission (310) operably coupled to the motor (306) to receive torque from the motor (306); an output shaft (314) rotatable about a central axis (318) and operably coupled to the transmission (310) to receive torque from the transmission (310); a clutch mechanism (514) coupled to the transmission (310) and operable in a first mode, in which torque from the motor (306) is transferred to the output shaft (314) through the transmission (310), and operable in a second mode, in which torque from the motor (306) is diverted from the output shaft (314); a shift mechanism (658) coupled to the transmission (310) and operable to disable at least one stage (338, 342, 346) of the transmission (310); and a mode selector ring (634) coupled to the shift mechanism (658) to actuate the shift mechanism (658) in response to rotation of the mode selector ring (634); wherein the clutch mechanism (514) includes a resilient member (566), and wherein, in response to rotation of the mode selector ring (634), the resilient member (566) is compressible to increase the amount of torque transferred to the output shaft (314) during the first mode of operation of the clutch mechanism (514).
摘要:
Grinder (1) as a power tool has a torque limiter (210). The torque limiter comprised a second bevel gear (211); a spindle (213); a flange (212) to which the rotation of the second bevel gear is transmitted, and a plurality of balls (214) which are disposed between the second bevel gear and the flange. The ball is positioned at a first region and the second bevel gear, the ball and the flange rotate integrally thereby the rotation is transmitted to the flange. On the other hand, in a state that a torque exerted on the spindle exceeding the predetermined threshold, a relative rotation between the second bevel gear and the flange is occurred and the ball moves from the first region to the second region while rolling by means of the relative rotation. Therefore, the transmission of the rotation from the second bevel gear to the flange is regulated, and the torque exerted on the spindle is regulated.
摘要:
Unintended movement governor for limiting the movement of a moving object, which unintended movement governor comprises a pulley (1), a part (2), coupling means (5), with which the part (2) is connected to the pulley (1), for rotating the part (2) via the coupling means along with the pulley (1), and means (3) that can be switched into a state limiting the movement of the part (2). When the means (3) are in the state limiting the movement of the part (2) they are arranged to impair the rotation of the part (2) along with the pulley (1) such that relative movement is caused between the part (2) and the pulley (1) if the pulley (1) rotates, and that when the part (2) is in the limited state in terms of its movement it is arranged to stop the rotation of the pulley (1) or at least essentially decelerate the rotation after the part (2) and the pulley (1) have moved a predetermined amount (A, B) with respect to each other. The elevator according to the invention comprises an unintended movement governor as defined in the preceding.