Torque transmission device

Abstract

A torque transmission device which is provided with a low torque input means (8), an output rotating means (11) which is magnetic-coupled to the low torque input means so as to generate thrust force by sensing a load, and a high torque input means (15) which is engaged with the output rotating means (11) to transmit the torque during the rotation of a high load, wherein the low torque input means (8) has pole teeth (9) which face magnetic poles (12) of the output rotating means so as to be magnetic-coupled during the rotation of a low load, and side section magnetic substances (10) which face the magnetic poles (12) slid by the thrust force generated by the relative rotation of the magnetic poles (12) and pole teeth (9) so as to be magnetic-coupled during the rotation of the high load, and wherein the output rotating means has the magnetic poles (12), a magnet (13); sandwiched between the magnetic poles (12), and a claw clutch section (14) which is engaged with the high torque input means (15) during the rotation of the high load. Conventional torque transmission devices have a problem of causing cases in which power transmission cannot be always sufficiently achieved, and the clutch capacity does not sufficiently function during a high load. Furthermore, the conventional torque transmission devices have a problem that a rotation-thrust conversion mechanism for operating a speed switching member has a hollow disk in which a permanent magnet is provided, and an output disk in which a magnet for moving the hollow disk, magnetic force for a magnetic cushion which gives return force to the hollow disk, or the like is provided, and, because the conversion mechanism, the configuration of which is complicated and the number of components of which is high in number is provided aside from a transmission body, the complicated and upsized configuration of a transmission and an increase in the number of components cause an increase in cost.

Description

technical field [0001] The present invention relates to a torque transmission device that transmits rotational torque between two rotating bodies by magnetic attraction force. Background technique [0002] Conventionally, a device for transmitting rotational force by magnetic coupling has been proposed (Patent Document 1, FIG. 2 (C) ). [0003] In the above-mentioned patent documents, a mechanism for efficiently transmitting rotational force by the magnetic attraction force of a plurality of magnetic poles has been proposed. However, if a load torque exceeding the magnetic coupling force acts on these torque transmission devices, idle rotation will occur. . However, in order to detect the presence or absence of idling, a complicated detection mechanism for detecting the rotation difference between the two rotating bodies is required. [0004] In addition, a non-contact load-sensing automatic transmission that magnetically performs a switching operation of an electromagneti...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned non-contact load-sensing automatic transmission includes: an input mechanism from a speed reducer; a rotating body rotatably connected to the input mechanism; ; It is equipped with a magnet for an electromagnetic clutch that can face each magnetic body through a gap, and a speed switching member that is movably arranged in the axial direction; the relative position of the above speed switching member to the rotation direction changes correspondingly with the load acting on the output side, by The rotation-thrust conversion mechanism that moves the speed switching member in the axial direction due to a change in the relative position of the rotation direction, the rotation-thrust conversion mechanism is provided on the speed switching device by switching the relative position of the rotation direction according to the load. The repulsion and attraction between the magnet on the member and the magnet provided on the output side member, and the speed switching member is moved in the axial direction by this switching, so that any of the magnets for the electromagnetic clutch and the magnetic body of the above-mentioned rotating body One is opposite to change the speed of the output mechanism, its structure is complex, the switching action is unstable, and the other is a rotation-thrust conversion mechanism that is difficult to miniaturize

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