US 11,654,523 B2
Cement surface grinding device
Shun-Jhong Li, New Taipei (TW); Yun-Ciao Wang, Kaohsiung (TW); and Yun-Jui Yang, New Taipei (TW)
Assigned to YunJui Yang, Taipei (TW); and Shun-Jhong Li, Taipei (TW)
Filed by Shun-Jhong Li, New Taipei (TW); Yun-Ciao Wang, Kaohsiung (TW); and Yun-Jui Yang, New Taipei (TW)
Filed on Dec. 14, 2020, as Appl. No. 17/120,293.
Prior Publication US 2022/0184767 A1, Jun. 16, 2022
Int. Cl. B24B 7/18 (2006.01); B28D 1/00 (2006.01)
CPC B24B 7/186 (2013.01) [B28D 1/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A cement surface grinding device, comprising:
a central disk; a center of the central disk being connected and extended upwards with a central shaft; the central disk being rotatable with respect to the central shaft; a bottom of the central disk being installed with a central pad;
at least one outer rotary disk arranged around the central disk; a bottom of the outer rotary disk being installed with a grinding sheet;
a rotary frame arranged above the central disk and the at least one outer rotary disk; the rotary frame including a connecting frame and a plurality of connecting rods; an upper side of the central shaft being connected to a central hole of a seat and the seat being connected to a lower side of the connecting frame; an inner end of the connecting rod being detachably connected to a respective outer end of the connecting frame; an outer end of the connecting rod being connected to a respective one of the outer rotary disk; a center of the connecting frame being a through hole; each outer rotary disk being formed with an outer belt wheel and the central disk being formed with a connecting element; a belt winding around the connecting element and the outer belt wheel;
wherein in operation, the through hole of the connecting frame serves to receive an outer driving source so as to drive the connecting frame of the rotary frame to rotate and then the plurality of connecting rods and the central shaft are driven to rotate; rotation of the connecting frame will drive the at least one outer rotary disk to rotate around a periphery of the central disk, the belt drives the outer belt wheel to rotate and thus the at least one outer rotary disk is driven to rotate; by the rotation of the at least one outer rotary disk and the revolution of the at least one outer rotary disk with respective to the central disk, the outer grinding sheets are driven to grind the cement surface; and the cement surface is a concrete surface in that the cement is solidified.