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High-precision constant-transmission-ratio transmission mechanism based on ball screws

A technology of ball screw and fixed transmission ratio, which is applied in the field of precision transmission, can solve the problems of lack of position stability, looseness of flexible transmission, and low dynamic stiffness of flexible transmission, and achieve long-term position stability, high dynamic stiffness, The effect of high transmission precision

Inactive Publication Date: 2013-09-04
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

For ordinary mechanical transmission, it is difficult to meet the above requirements at the same time. For example, gear transmission generally has backlash, and the dynamic stiffness of flexible transmission such as belt transmission and chain transmission is not high. At the same time, the flexible transmission will loosen as time goes by, etc. phenomenon, does not have long-term positional stability

Method used

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  • High-precision constant-transmission-ratio transmission mechanism based on ball screws
  • High-precision constant-transmission-ratio transmission mechanism based on ball screws
  • High-precision constant-transmission-ratio transmission mechanism based on ball screws

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Embodiment Construction

[0016] The inventive idea of ​​the present invention is to select a suitable ball screw and its length according to the space of the used occasion and the range of rotation angle of the transmission, and to select the leads and precision grades of the two screw screws according to the required transmission ratio and transmission accuracy. The screw shaft is installed on the fixed seat through two angular contact ball bearings. During assembly, the bearing end cover is repaired to eliminate the axial gap, so as to improve the overall rigidity of the transmission mechanism. One lead screw shaft is connected with the input end, and the other lead screw is connected with the output end, so that a constant transmission ratio transmission from the input end to the output end can be realized. The rotation direction of the two screw rods can be flexibly selected to realize transmission in different rotation directions.

[0017] The present invention will be described in detail below i...

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Abstract

The invention provides a high-precision constant-transmission-ratio transmission mechanism based on ball screws, and belongs to the field of precision transmission. The mechanism is used for achieving constant-transmission-ratio transmission of parallel shafts (including coaxial shafts). Nuts of the ball screws of the two parallel shafts are connected, leads, precision grades and turning directions of the two ball screws are selected, and accordingly constant-transmission-ratio high-precision transmission in different turning directions is achieved. The mechanism has high transmission precision, high dynamic rigidity and long-term position stability, and is free of backlash, suitable for being use in a space in an optical instrument where the constant-transmission-ratio transmission is needed and meanwhile suitable for the precise transmission field with the same requirement.

Description

technical field [0001] The invention belongs to the field of precision transmission, and in particular relates to a high-precision fixed transmission ratio transmission mechanism based on a ball screw. Background technique [0002] In optical instruments, the position accuracy of optical components is very high, so the driving mechanism of moving optical components generally has the following requirements: high transmission accuracy, no backlash, high dynamic stiffness (that is, stable transmission under vibration and other conditions) accuracy) and long-term positional stability. For ordinary mechanical transmission, it is difficult to meet the above requirements at the same time. For example, gear transmission generally has backlash, and the dynamic stiffness of flexible transmission such as belt transmission and chain transmission is not high. At the same time, the flexible transmission will loosen as time goes by, etc. Phenomena, do not have long-term positional stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H25/22
Inventor 刘波贾继强
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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