Planetary roller screw

A technology of planetary rollers and rollers, which is applied to belts/chains/gears, mechanical equipment, transmission devices, etc., can solve the problems of restricting the promotion and application of planetary roller screws, complicated manufacturing processes, and difficult manufacturing, and achieves The effect of low processing cost, simple manufacturing process and reasonable structure

Inactive Publication Date: 2012-07-11
上海久能机电制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lead screw, nut and rollers of the existing planetary roller screw all adopt threads with a certain helix angle, so it is difficult to manufacture, especially the manufacturing process of the rollers and nuts is complicated and the cost is high, thus greatly Constrained the popularization and application of planetary roller screw

Method used

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  • Planetary roller screw
  • Planetary roller screw
  • Planetary roller screw

Examples

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. But the following examples are not intended to limit the present invention, and all structures similar to the present invention and equivalent changes to it should be included in the protection scope of the present invention.

[0014] Please refer to figure 1 and figure 2 , The illustrated planetary roller screw includes a screw 1, a nut 2, a number of rollers 3, two roller cages 4, two elastic inner retaining rings 5 ​​and two ring gears 6.

[0015] The thread of the screw rod 1 has a certain helix angle, and the profile of the thread is a triangular or arc thread. Said nut 2 is set outside the screw mandrel 1, and the middle part of the inner hole of the nut 2 is provided with a number of juxtaposed annular tooth sockets. It is the same as the pitch of the screw thread of the screw mandrel 1 .

[0016] The two inner ring gears 6 are respec...

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Abstract

The invention discloses a planetary roller screw which comprises a lead screw, a nut, two roller retainers, two elastic inner check rings, two inner gear rings and a plurality of rollers arranged between the lead screw and the nut; the two inner gear rings are respectively fixed at the two end parts of an inner hole of the nut, parallel annular tooth sockets are arranged at the middle part of the inner hole of the nut, the two roller retainers are respectively sleeved in the inner holes of the two inner gear rings and are respectively blocked and located by the two elastic inner check rings embedded in the inner gear rings, retaining holes, whose number is consistent with that of the rollers, are arranged on the roller retainers, parallel teeth embedded with the threads of the lead screw and the annular tooth sockets of the nut are arranged at the middle parts of the rollers, the two end parts of the rollers are plain spindle heads, and the plain spindle heads are respectively inserted in the retaining holes of the two roller retainers. The planetary roller screw has a reasonable structure, convenience for manufacture, high transmission efficiency, large bearing capacity, high movement precision and low manufacturing cost, so that the planetary roller screw can be extensively applied on such apparatuses as numerical control machine frames and harbor machinery, etc.

Description

technical field [0001] The invention relates to a transmission mechanism for converting rotary motion into linear motion, in particular to a planetary roller screw, which belongs to the technical field of mechanical engineering. Background technique [0002] The screw is a typical transmission mechanism that converts rotary motion into linear motion through a screw pair. At present, the screw pair is mainly divided into two categories: one is the sliding auxiliary screw that uses sliding screw transmission, such as trapezoidal thread screw, rectangular thread Screws, etc.; the other type is a rolling screw driven by a rolling screw, such as a ball screw. The sliding auxiliary screw has a large bearing capacity and is mainly used to transmit power, but its efficiency is very low and its response is slow, so it cannot be used in high-precision and high-speed occasions. The rolling screw has high precision, high transmission efficiency, and fast response, and has been widely u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22
Inventor 李六弟乔华山
Owner 上海久能机电制造有限公司
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