Rotating and reciprocating double-degree-of-freedom large power load rotating shaft system

Abstract

The invention discloses a rotating and reciprocating double-degree-of-freedom large power load rotating shaft system. The rotating and reciprocating double-degree-of-freedom large power load rotatingshaft system comprises at least two dense ball bearings, one ball spline supplementary bearing and one central main shaft. The central main shaft is used as an inner ring of the dense ball bearings and the ball spline supplementary bearing, and the dense ball bearings and the ball spline supplementary bearing can be connected to corresponding positions of the central main shaft in a sleeving modeaccording to requirements. According to the rotating and reciprocating double-degree-of-freedom large power load rotating shaft system, the dense ball bearings and the ball spline supplementary bearing both adopt a single layer of rolling support, the dense ball bearings adopt a spiral multi-row ball distribution method, and the friction torque is reduced and the rotating speed, working efficiencyand load bearing capacity are improved and the working life is prolonged compared with traditional sliding bearings. The ball spline supplementary bearing adopts a multi-row linear ball method, and compared with traditional linear bearings and high-precision lead screws, the bearing capacity is improved, the structure is more adaptable, and the design of large power load and small size can be realized.

Description

Technical field [0001] The invention relates to a heavy load rotary shaft system with double degrees of freedom of rotation and reciprocation, which is suitable for other deep space star sampling and civil volume and weight restrictions that need to realize heavy load rotary-impact compound motion or impact mechanism, belonging to deep space Detection technology field. Background technique [0002] The third phase of the lunar exploration drilling sampling device provides rotation and impact motion through the drilling mechanism, and drills the lunar soil sample with a depth of about 2 meters in the target area at the landing site to the coring mechanism. During the lunar drilling and sampling process, as the drilling progresses, the collected lunar soil composition will change, which will affect the drilling procedures of the drilling sampling device. Therefore, the drilling mechanism needs to be able to adapt to heavy loads during the drilling process. Demand, and realize the ...

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Problems solved by technology

The former has a simple structure, but the drilling mechanism has poor load-carrying capacity, low transmission efficiency, unsuitable high speed, and high requirements for lubrication. The sliding bearing is easy to wear under extreme conditions, which is not conducive to the execution of lunar soil sampling tasks; the latter is due to The nesting of bearings leads to a responsible structure, increased volume and weight, and it is difficult to achieve the requirements of lightweight and miniaturized spacecraft

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