Differential planetary roller screw

A planetary roller and lead screw technology, which is applied in the direction of transmission devices, belts/chains/gears, mechanical equipment, etc., can solve the problems of unfavorable integration of roller screws and transmission devices, achieve large screw teeth, realize integrated design, The effect of strong bearing capacity

Active Publication Date: 2015-06-03
BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of structure is not conducive to the integration of the roller screw and the transmission device, such as the integration with the motor, the integration of the roller screw and the output part of the electromechanical actuator, etc.

Method used

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  • Differential planetary roller screw
  • Differential planetary roller screw

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Embodiment Construction

[0024] The present invention will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention.

[0025] Please refer to figure 1 , figure 1 It is a schematic cross-sectional schematic diagram A of a typical structure of a reverse differential planetary roller screw. It is also the first embodiment of the present invention.

[0026] The reverse differential planetary roller screw includes a nut 1, two end cages 2, a roller 3, two retaining rings 4, and a screw 5. The nut 1 has an internal thread and a thread lead angle, and is in the form of an integral nut. The number of rollers 3 is 3, 4, 5, 6, 7, 8, 9 or 10, and the structure is in the form of a stepped shaft, and the radial dimensions at both ends of the stepped shaft are smaller than the radial dimension of the middle section , all of which are provided...

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PUM

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Abstract

The invention discloses a differential planetary roller screw which comprises a nut, a plurality of rollers, a screw body and end retaining frames. The screw body is provided with an external thread, the nut provided with an internal thread encloses the screw body and is coaxially arranged with the same, the rollers are arranged between the screw body and the nut, each roller is provided with an external thread and is meshed with the screw body and the nut in a threaded manner, each end retaining frame is a toroidal shaped and is provided with holes matched with the rollers in number, shaft ends of the rollers penetrate the end retaining frames which are mounted on shaft shoulders of the screw body, and the end retaining frames are positioned with the screw body through a retaining ring mounted in the shaft groove of the screw body. An integrated nut structure of a reverse differential roller screw is easy to implement, connection by additionally arranging switching pieces is not needed when the differential planetary roller screw is applied to a core driving portion of an electro-mechanical actuator, an output structure can be directly designed on the nut, integral output is implemented, and integrate design of the electro-mechanical actuator is achieved.

Description

technical field [0001] The invention relates to the field of rolling screws, in particular to a planetary roller screw for converting rotational motion into translational linear motion and vice versa. Background technique [0002] The planetary roller screw is generally provided with a screw, a nut and rollers, the screw includes external threads; the nut is arranged around the screw and includes internal threads; the rollers are engaged with the external threads of the screw and the Internally threaded, planetary roller screw uses threaded rollers instead of balls as the force transmission unit. Compared with the ball screw, the force transmission unit has a larger contact radius and more contact points, so It is superior to ball screws in terms of positional accuracy, rated load, stiffness, speed, and life, and has been widely used in aviation, aerospace, precision machine tools, and food packaging in recent years. [0003] The differential planetary roller screw is a typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22
CPCF16H25/22F16H25/2247
Inventor 黄玉平徐强陈俊杰王水铭崔佩娟
Owner BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
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