Pole-changing positioning mechanism and pole-changing positioning method for multi-pole deep lunar soil sampler

Abstract

The invention provides a pole-changing positioning mechanism and a pole-changing positioning method for a multi-pole deep lunar soil sampler. The pole-changing positioning mechanism comprises a clamping mechanism and a pole-changing mechanism, wherein the clamping mechanism comprises a support mechanism at the lower end, a guide mechanism at the upper end and a central rotating shaft. The support mechanism at the lower end comprises a cylindrical clamp, a tension spring, a rotating shaft of the cylindrical clamp, a clamp rotating disc, a bolt A and a nut A; the guide mechanism at the upper end comprises a guide handle, a screw A, a guide rotating disc, a bolt B and a nut B; and the pole-changing mechanism comprises a positioning sliding block A, a positioning sliding block B, the rotating shaft of a lever frame, a pivot bracket, a return spring, the lever frame, a screw B, a pivot rotating shaft and a gear case. The pole-changing positioning mechanism has simple structure and low energy consumption, and can simplify the control process; simultaneously, the pole-changing positioning mechanism can solve the motion interference problem during pole-changing positioning, lead a drill rod to realize complete drilling down and achieve the desired sampling depth.

Description

technical field [0001] The invention belongs to the technical field of space resource detection, and in particular relates to a rod-changing positioning mechanism and a rod-changing positioning method of a multi-rod deep lunar soil sampler. Background technique [0002] The moon has always been the main goal of human deep space exploration. The resources and energy on the moon are an important supplement to the earth. Countries and organizations such as the United States, Japan, the European Space Agency, Russia, India and China have launched or are conducting lunar exploration. plan. China's lunar exploration project code-named "Chang'e Project" has started, and the "circling" of its three stages "circling", "falling" and "hui" has been successfully completed. At each stage, it is necessary to use a lunar soil sampler that can adapt to the special environment of the moon to complete the corresponding lunar soil sampling task. [0003] The United States and the Soviet Unio...

AI Technical Summary

Problems solved by technology

[0004] However, in the prototype test of the sampler recorded in the patent No. ZL2007101211118, some deficiencies are still found: first, the rod changing positioning mechanism adopts an electromagnet plus a spring to realize the functions of fixing the drill rod and positioning, and the working energy consumption is relatively high. Big

During the drilling process of the drill pipe, a large amount of electric energy is used to generate electromagnetic force to overcome the elastic potential energy of the spring, which greatly reduces the working time of the sampler, and the effective utilization rate of energy is low

Second, the four sets of clamps of the drill pipe clamping mechanism are composed of 4 clips and 4 springs, and the structure is relatively complicated

The complex mechanism increases the weight of the whole system, and the launch cost and failure rate of the sampler will increase accordingly

In addition, the use of electromagnets to clamp the drill pipe also requires the addition of corresponding control modules, which increases the complexity of the control system

Third, the gear box and coupling connected to the output shaft of the rotating motor in the power part will interfere when they move to the drill pipe clamping mechanism in the vertical direction, which will affect the continued drilling of the drill pipe, resulting in the actual sampling depth not reaching the theoretical level. depth

In the published patent application number 200820231882.2, a drill pipe clamping mechanism equipped with an independent motor is provided, and a motor is used to drive two symmetrical clamping blocks to realize the clamping of the drill pipe. All equipped with such a clamping device obviously consumes a lot of energy, and the volume is too large

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