Planetary roller screw

A planetary roller and lead screw technology, which is applied to belts/chains/gears, mechanical equipment, transmission devices, etc., can solve problems such as not being suitable for high-speed operation, and achieve the effects of easy processing control, simple structure, and fewer parts

Inactive Publication Date: 2011-09-14
扬州众孚传动科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] Patent No. 200720034209.5 discloses a recirculating planetary roller screw, which also directly converts rotational motion into linear motion, and is suitable for small lead occasions, not suitable for high-speed operation

Method used

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

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] As shown in the figure, the new planetary roller screw consists of a screw 1, one or more rollers 2, a first roller planetary cage 3A, a second roller planetary cage 3B, a nut 4, a first stop The spacer ring 5A and the second limit spacer ring 5B are composed of the first and second roller planetary cages, the nut 4, the lead screw 1, and the first and second limit spacer rings. The roller planetary cage is set between the lead screw 1 and the nut 4; the end of each roller is movably set in the installation hole of the roller planetary cage; the limit spacer ring can be fixedly connected to the nut 4. The thread of screw 1 is single or multi-thread (three to eight threads), and the thread of one or more rollers 2 (usually 6-12 according to different specifications) is one or two kinds of leads. The thread teeth of the roller 2 are matched with each other and pe...

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Abstract

The invention provides a planetary roller screw which is simple and compact in structure, large in bearing ability, difficult to wear, wide in screw pitch range, capable of realizing high-speed operation and high in reliability. The structure of the planetary roller screw comprises a screw, one or more rollers, two roller planetary retainers, a nut and two limiting spacer rings. The planetary roller screw is small in axial gap, high in transmission efficiency and capable of realizing high-speed transmission from a small screw pitch to an extra large helical pitch, not only can realize conversion of rotary motion and linear motion, but also can realize high-speed rotation of the screw and the rotary motion of the nut in a corresponding speed ratio.

Description

Technical field: [0001] The invention relates to a novel planetary roller screw widely used in numerical control machine tools, control execution systems, positioning systems, plastic machinery, military industry, high-load linear motion systems, measuring equipment, high-speed rotary motion, and the like. Background technique: [0002] At present, there are two main types of common screw pairs: one is the friction pair screw such as trapezoidal thread screw and rectangular thread screw, and the other is the rolling auxiliary screw of ball screw. The planetary roller screw is a new type of rolling screw. The friction pair lead screw has a large load, but the efficiency is very low and the response is slow, so it cannot be used in high-precision and high-speed occasions. The ball screw has high precision, high efficiency, and quick response, and has been widely used in various CNC machine tools, but the ball screw has a small load capacity and poor rigidity. Compared with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22F16H25/24
Inventor 黄溧震王建波鞠小荣
Owner 扬州众孚传动科技有限公司
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