US 12,168,991 B2
Locking mechanism for folding chassis of electric cutting machines
Jesús González García, Rubi (ES)
Assigned to GERMANS BOADA, S.A., Rubi (ES)
Appl. No. 17/610,393
Filed by GERMANS BOADA, S.A., Rubi (ES)
PCT Filed Feb. 10, 2020, PCT No. PCT/ES2020/070091
§ 371(c)(1), (2) Date Nov. 10, 2021,
PCT Pub. No. WO2021/160902, PCT Pub. Date Aug. 19, 2021.
Prior Publication US 2022/0252095 A1, Aug. 11, 2022
Int. Cl. F16B 2/06 (2006.01); B25H 1/00 (2006.01); F16M 11/38 (2006.01)
CPC F16B 2/06 (2013.01) [B25H 1/0042 (2013.01); F16M 11/38 (2013.01); F16M 2200/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A locking mechanism for folding chassis of electric cutting machines; said folding chassis (1) comprising: a principal supporting arm (10); a supporting base (11) and a tilting arm (12) that are collapsible with respect to the principal arm (10) and related to each other by an end arm (13) bearing wheels (14) and that collapses together with the supporting base (11) and with the tilting arm (12) during the folding and unfolding of the chassis (1), wherein said locking mechanism comprises:
a locking clip (21) installed on the tilting arm (12), the locking clip (21) being configured to turn between: an operative position for the locking of the chassis (1) in the folded position and in the unfolded position, and an inoperative position for unlocking of the chassis (1); said locking clip comprising a rear coupling recess (212) in a first locking rod (133) of the chassis (1) in the unfolded position; said first locking rod (133) being fixed to the end arm (13);
a front coupling recess (213) in a second locking rod (112) of the chassis (1) in the folded position, said second locking rod (112) being fixed in an upper area of the supporting base (11); and in that the locking mechanism further comprises:
a trigger (22) installed on the tilting arm (12), the trigger (22) being configured to turn and displace between: a position for retaining of the locking clip (21) in the operative position for the locking of the chassis (1); and a free position in which it enables the locking clip (21) to be displaced towards the inoperative position; and
an elastic element that tends to displace the locking clip (21) towards the inoperative position, and to displace the trigger (22) towards the inoperative position for the unlocking of the chassis (1);
wherein said trigger (22) comprises an appendix (222) which, in the operative position for the locking of the chassis (1), acts against a stop (214) of the locking clip (21), retaining it in said locked position, returning the locking clip (21) to the inoperative position by action of the elastic element (23), when the trigger (22) is manually displaced towards the free position; and
wherein the rear recess (212) and the front recess (213) of the locking clip (21) are respectively arranged below and above the tilting arm (12), so that the elastic element (23) always tends to keep the locking clip (21) in an inoperative unlocked position with respect to the locking rods (112, 133).