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Torqeu limiter

A technology of torque limiter and relative rotation, which is applied in the direction of shaft couplings, slip couplings, mechanical equipment, etc., and can solve problems such as uneven loading and damage to the durability of the inner wheel 43, so as to prevent interference and improve The effect of durability

Inactive Publication Date: 2009-07-08
NTN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a state, the inner ring 43 rotates in a state where the cut end 55 of the coil spring 44 interferes with the outer diameter surface of the inner ring 43 and is used as a torque limiter by being installed inside the outer ring member 41 . The load on the outer diameter surface of the inner ring 43 becomes uneven to impair the durability of the inner ring 43

Method used

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  • Torqeu limiter
  • Torqeu limiter
  • Torqeu limiter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0047] The torque limiter according to Embodiment 1 is configured as described above, and a predetermined torque is generated by the relative rotation of the outer ring member 1 and the inner ring 2 along with the diameter expansion of the coil spring 4 as in the conventional one. In the initial stage of the moment generation, the bending of the existing curled end is suppressed by making the inner diameter surfaces of the regulating protrusions 28 and 31 the restricting surface to restrict the swelling of the curled end, thereby suppressing the occurrence of bending of the curled end. Therefore, at the initial stage of torque generation, the diameter-expanding action of the coil spring 4 occurs without gap generation, and torque is directly generated. In addition, since the two end surfaces 33', 34' of the coil spring 4 are formed with relief portions 33, 34 in advance, they do not interfere with the outer diameter surface of the inner ring 2, thereby avoiding the generation o...

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PUM

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Abstract

The present invention provides a spring-type torque limiter capable of preventing interference between both ends of a coil spring and an inner wheel, thereby improving durability. The torque limiter is provided with an arc shape with a larger radius of curvature than other coil parts in a free state at both ends of the coil spring (4) mounted on the outer diameter surface of the inner wheel (2). The evacuation parts (33), (34), by setting the size of the radius of curvature to the state that the coil spring (4) is expanded and installed on the above-mentioned inner wheel (2) with a predetermined matching amount. The radii of curvature of the parts are substantially equal in size, thereby preventing the two ends of the coil spring (4) from colliding with the inner wheel (2).

Description

technical field [0001] The present invention relates to a spring-type torque limiter used in office equipment such as printers and copiers, in particular capable of preventing interference between coil spring ends and inner wheels. Background technique [0002] Spring-loaded torque limiters used in office equipment, etc., which have been well known for a long time, such as Figure 7 As shown, it is composed of the following components: an outer ring member 41, an inner ring 43 inserted into the inner ring and supported in a hub portion 42 at one end in a relatively rotatable manner, mounted on the outer ring of the inner ring 43 with a prescribed fitting amount. The coil spring 44 on the radial surface closes and fits the gap between the outer diameter surfaces of the inner ring 43 fixed on the inner diameter surface of the other end portion of the outer ring member 41 and supports the free-rotatable inner ring 43. Member 49. The coil spring 44 has a large-diameter portion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D7/00
Inventor 本多正明山本贵志
Owner NTN CORP