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Torque limiter

A technology of torque limiter and limiting mechanism, which is applied in the direction of coupling, slip coupling, object separation, etc., and can solve the problems of increased rotational frictional resistance, instability, and unstable torque transmitted by the torque limiter. , to achieve the effect of increasing the cost

Inactive Publication Date: 2006-09-13
TOK BEARING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, as described above, since a part of the shaft member is cut off, these cut chips or swarf remain inside the housing and adhere to the rotating bearing part, causing the rotational frictional resistance to increase and become unstable, eventually resulting in torque loss as a torque. The transmission torque of the limiter is unstable

Method used

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  • Torque limiter
  • Torque limiter
  • Torque limiter

Examples

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Embodiment Construction

[0036] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0037] figure 1 Among them, reference numeral 4 is the outer rotating body (casing) of the torque limiter 2, and a cover 6 and a semi-hard magnetic body (hysteresis ring) 8 are fixed to the inner diameter portion thereof.

[0038] A plurality of grooves 10 extending along the entire length in the axial direction are formed in the cover 6 . In the torque limiter composed of a permanent magnet and a semi-rigid magnetic body which is the object of the present invention, the permanent magnets arranged opposite to each other magnetize the semi-rigid magnetic body to transmit a rotational force proportional to the area of ​​its hysteresis loop (Hysteresis torque). And, when exceeding the maximum transmission torque, the permanent magnet and the semi-hard magnetic body rotate relatively with the state of maintaining a constant torque. At this time, the semi-hard m...

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PUM

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Abstract

The torque limiter 2 is constructed such that an internal rotator 12 is rotatably incorporated in an external rotator 4, the permanent magnet 18 is assembled in one of the external rotator 4 and the internal rotator 12, for example, in the rotator 12 and a semihard magnetic member 8 facing to the permanent magnet 18 is assembled in the other rotator 4. An elastic member 22 is provided between the rotator 12 and the permanent magnet 18 as a means for assembling the permanent magnet 18 in the rotator 12. The elastic member 22 presses both the rotator 12 and the permanent magnet 18 at least in the radial direction. As a result, the permanent magnet 18 is secured to the rotator 12 due to the elastic force of the elastic member 22.

Description

technical field [0001] The present invention relates to a torque limiter utilizing magnetic force. Background technique [0002] As a torque limiter using magnetic force, there is known a torque limiter in which a permanent magnet is fixed to a rotating member by bonding (for example, refer to Patent Document 1-Japanese Patent Laid-Open Publication No. 7-7919, Patent Document 2-Japanese Patent Laying-Open No. 6-321341). In addition, it is also known to provide a plurality of protrusions on either one of the resin rotating body or the permanent magnet, and when the permanent magnet and the resin rotating body are fitted together, the front ends of the above-mentioned protrusions are connected to the resin rotating body. Or the torque limiter formed by the pressure contact of either side of the permanent magnet. [0003] The brief principle of this torque limiter using magnetic force is that it has a pair of rotating parts that can rotate relative to each other. A permanent...

Claims

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Application Information

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IPC IPC(8): F16D7/00B65H3/52
Inventor 秋场润一郎
Owner TOK BEARING CO LTD