Abstract:
The invention concerns a safety device for electrically operated hand tools (1), in particular circular and compass saws in which the motor drive is transmitted via a clutch plate with a clutch (10) to a tool (5) fitted on a tool carrier (4). The safety device in question is provided with an electronic sensor circuit (SÜS) with lifting magnet control (HS) which, if the tool (5) comes into contact with any part of the operator's body, breaks the connection between the drive motor (8) and tool (10) by causing the clutch magnetically to disengage. To ensure easy re-engagement of the clutch (10) where there is no danger to the operator, it is proposed that the disengageable clutch should be provided with coupling elements (13, 16) capable of axial displacement or radial excursion, the said coupling elements being displaced/lifted by a lifting magnet (15) once energised out of the seats (11, 25) which create the force flux.
Abstract:
A driven accessory having a clutch that permits selective operation of an accessory portion. The clutch employs rotational inertia to control driving engagement of a wrap spring to an interior clutch surface on a drive member and/or driving disengagement of the wrap spring from the interior clutch surface.
Abstract:
A coupling device system for use in a motor vehicle is provided including a coupling device and a memory chip. The coupling device has an input member, an output member, and at least one modulating clutch assembly selectively coupling the input member to the output member. The modulating clutch assembly includes an electrical clutch operator and clutch plates. The clutch plates include at least one first clutch plate coupled to the input member and at least one second clutch plate coupled to the output member. The second clutch plate is disposed adjacent the first clutch plate. The memory chip is integrated with the coupling device and is configured to store data related to a measured characteristic of the coupling device. The memory chip is also configured to communicate with a vehicle controller. A method of providing a calibration curve of the coupling device to the vehicle controller is also disclosed.
Abstract:
This invention relates to a structure and method of mounting a built-in type of discharge element part, wherein the discharge element part connected to lead wires is mounted inside a magnetic field coil assembly. The structure of mounting the discharge element part that is adapted to be connected to a magnetic clutch field coil assembly (3), for cutting off a reverse electromotive force generated from the magnetic clutch field coil assembly (3) if power is off, wherein the discharge element part (D) is mounted at one side of a flange (21) of a bobbin (20) opposite to a receiving part of a housing (10) of the magnetic clutch field coil assembly (3) and is inserted into the housing (10).
Abstract:
A controller of an electromagnetic clutch 70 performing a switching operation between coupling and uncoupling of a power transmission mechanism in order to transmit or not transmit power between an engine and a dynamo-electric machine through the power transmission mechanism thus preventing generation of a loud impact sound from the electromagnetic clutch. At the time of making a switch from coupled state to uncoupled state, excitation damping means 120, 130 reduce exciting power gradually while switching the exciting direction of the electromagnetic clutch 70 by a field coil 71 alternately.
Abstract:
An automatic clutch for simplifying engine clutch control system consists of a sleeve (1), a spring (2), a spindle (3) and an inertia wheel. The torque is transmitted by the friction force between the spring and the spindle. Since the engine speed variation is controlled by the rotation inertia of the inertia wheel and the clamping torque of one of the spring ends is controlled by the rotation moment which is caused by the angle speed variation of the inertia wheel relative to another of the spring ends, the automatic clutch may control the friction force and power output and be automatically engaged and disengaged.
Abstract:
The invention concerns a safety device for electrically operated hand tools (1), in particular circular and compass saws in which the motor drive is transmitted via a clutch plate with a clutch (10) to a tool (5) fitted on a tool carrier (4). The safety device in question is provided with an electronic sensor circuit (SÜS) with lifting magnet control (HS) which, if the tool (5) comes into contact with any part of the operator's body, breaks the connection between the drive motor (8) and tool (10) by causing the clutch magnetically to disengage. To ensure easy re-engagement of the clutch (10) where there is no danger to the operator, it is proposed that the disengageable clutch should be provided with coupling elements (13, 16) capable of axial displacement or radial excursion, the said coupling elements being displaced/lifted by a lifting magnet (15) once energised out of the seats (11, 25) which create the force flux.