Low-counterforce composite sampling device suitable for extraterrestrial celestial body

The invention relates to a low-counterforce composite sampling device suitable for an extraterrestrial celestial body. The low-counterforce composite sampling device comprises a rotary drum assembly,a grinding wheel assembly, two punch hammer assemblies, two wheel brush assemblies and two limiting columns. The wheel brush, the grinding wheel and the impact hammer of the three sampling tools can achieve low-counter-force sampling, wherein the wheel brush avoids large loads through elastic deformation, the grinding wheel achieves low-counter-force rock breaking by controlling the feeding speed,and the impact hammer rotates around the axis to achieve rotary avoiding after each time of impact. On the basis that a small celestial body sampling object is high in uncertainty, sampling has the characteristic of low reaction force and the like, the mode of highly integrated coupling design of multiple sampling tools such as wheel brush scraping, grinding wheel cutting and impact hammer impacting is adopted, so that th