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Differential planetary roller screw pair, assembly tool and assembly process

A technology of planetary roller and assembly process, applied in the direction of transmission, belt/chain/gear, mechanical equipment, etc., can solve the problem of rare differential planetary roller screw pair, etc., to achieve low tooling cost, tooling Simple structure and convenient operation

Active Publication Date: 2022-04-12
西安索睿科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the application of differential planetary roller screw pair is rare in China, and the research on its assembly tooling is still in the stage of theoretical design

Method used

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  • Differential planetary roller screw pair, assembly tool and assembly process
  • Differential planetary roller screw pair, assembly tool and assembly process
  • Differential planetary roller screw pair, assembly tool and assembly process

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Embodiment Construction

[0039] Such as figure 1 As shown, the main structure of the differential planetary roller screw pair includes a screw 1, a roller 2, a nut 3, a cage 4, and a retaining ring 5. Several rollers 2 are installed between the lead screw 1 and the nut 3, and the rollers 2 are evenly distributed around the lead screw through the cage 4. The circlip 5 is clamped at both ends of the nut to limit the axial movement of the roller 2 and the cage 4 .

[0040] Lead screw 1 can be made into single thread or multi-thread form, except for screw thread section, other parts can be designed according to functional requirements. The figure shows only the threaded section.

[0041] The roller 2 is divided into five sections, and the middle three sections are annular threads, and the thread diameter of the most middle section is large, and the thread diameters on both sides are small. The two outermost sections are designed as unthreaded ends for cooperating with the cage 4 .

[0042] The nut 3 i...

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Abstract

The invention relates to the technical field of mechanical assembly, and discloses a differential planetary roller lead screw pair, an assembly tool and an assembly process, a plurality of rollers are mounted between a lead screw and a nut, the rollers are uniformly distributed around the lead screw through a retainer and are in threaded engagement with the lead screw, and elastic check rings are clamped at two ends of the nut to limit axial movement of the rollers and the retainer; the pin roller is divided into five sections, the nut is divided into five sections, the screw rod, the pin roller and the nut are equal in thread pitch, the screw rod is meshed with the threads of the middle section of the pin roller, and the threads of the two middle sections in the nut are meshed with the threads of the two middle sections of the pin roller. Different pin rollers need to be placed at different phases if the leads of the lead screw are different, the pin rollers have five different placement phases according to different starting points of threads of a middle section where the pin rollers are meshed with the lead screw, and the phase difference between every two adjacent pin rollers is one fourth of the lead. Radial adjustment in the roller installation process is achieved, all the rollers are evenly distributed, and it is guaranteed that screwing is smooth when a lead screw is assembled.

Description

technical field [0001] The invention relates to the technical field of mechanical assembly, in particular to an assembly tool for a planetary roller screw pair. Background technique [0002] Compared with ordinary ball screw sets, planetary roller screw sets have higher bearing capacity and impact resistance, and are widely used in aviation, aerospace, weaponry, robots and other fields. The planetary roller screw pair has various structural forms such as standard type, reverse type, circulation type, and differential type. Among them, the differential planetary roller screw pair can obtain a smaller lead than the standard planetary roller screw pair, and because the structure does not need to install the inner ring gear, the two ends of the roller do not need to process gears, and the structure is more compact. , In terms of performance, the power density is high, and the transmission is more stable. Due to the particularity of the structure, the assembly of the differenti...

Claims

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Application Information

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IPC IPC(8): F16H25/22F16H25/24
Inventor 渠聚鑫孟利军姚良李鸿斌姚春江马爽杨俊华
Owner 西安索睿科技有限公司
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