TH82197A - Expandable shaft - Google Patents

Abstract

DC60 expandable shaft (5) including outer shaft (13; 13A; 13B; 13C; 13D) and inner shaft (14; 14A; 14B; 14C; 14D; 14E; 14F), many rolling parts (15). Being clamped flexibly in The space between the rail groove (16; 17) of the outer shaft (13; 13A; 13B; 13C; 13D) and the inner shaft (14; 14A; 14B; 14C; 14D; 14E; 14F) with the elastic recovery force of the The outer shaft (13; 13A; 13B; 13C; 13D) The outer (141) surface of the inner shaft (14; 14A; 14B; 14C; 14D; 14E; 14F) includes at least one pair of flat sections (21; 22; 41; 42; 43; 44; 45; 46) where the parallel surfaces (131) of the outer shaft (13; 13A; 13B; 13C; 13D) include at least one pair of finite sections. - flat (31; 32; 71; 72; 73; 74), where, parallel to each other, finite sections (31; 32; 71; 72; 73; 74) each section limits the amount of relative rotation of the outer shaft (13; 13A. ; 13B; 13C; 13D) and inner shaft (14; 14A; 14B; 14C; 14D; 14E; 14F) with a connection to the corresponding flat section (21; 22; 41; 42; 43; 44; 45; 46. ) The deformation promotion section (33; 33A; 33B; 33C; 33D; 33E; 33F; 33G; 33H; 330) to promote the deformation of the outer shaft (13; 13A; 13B; 13C; 13D) was placed in the The outer shaft specific area (13; 13A; 13B; 13C; 13D) in the circumference direction.The specific region is the area between the planes (C1) that includes the center of the arc (A2) of the groove (16). The outer shaft (13; 13A; 13B; 13C; 13D) is combined with the central axis (A1) of the outer shaft (13; 13A; 13B; 13C; 13D) and the individual limiting section (31; 32; 71; 72; 73; 74) expandable shaft (5), including outer shaft (13; 13A; 13B; 13C; 13D) and inner shaft (14; 14A; 14B; 14C; 14D; 14E; 14F) rolling part (15 ) Large numbers of clamps are flexibly in The space between the rail groove (16; 17) of the outer shaft (13; 13A; 13B; 13C; 13D) and the inner shaft (14; 14A; 14B; 14C; 14D; 14E; 14F) with the elastic recovery force of the The outer shaft (13; 13A; 13B; 13C; 13D) The outer (141) surface of the inner shaft (14; 14A; 14B; 14C; 14D; 14E; 14F) includes at least one pair of flat sections (21; 22; 41; 42; 43; 44; 45; 46) where the parallel surfaces (131) of the outer shaft (13; 13A; 13B; 13C; 13D) include at least one pair of finite sections. - flat (31; 32; 71; 72; 73; 74), where, parallel to each other, finite sections (31; 32; 71; 72; 73; 74) each section limits the amount of relative rotation of the outer shaft (13; 13A. ; 13B; 13C; 13D) and inner shaft (14; 14A; 14B; 14C; 14D; 14E; 14F) with a connection to the corresponding flat section (21; 22; 41; 42; 43; 44; 45; 46. ) The deformation promotion section (33; 33A; 33B; 33C; 33D; 33E; 33F; 33G; 33H; 330) to promote the deformation of the outer shaft (13; 13A; 13B; 13C; 13D) was placed in the The outer shaft specific area (13; 13A; 13B; 13C; 13D) in the circumferential direction (16) of the outer shaft (13; 13A; 13B; 13C; 13D) in conjunction with the outer shaft (A1) axis line (13; 13A; 13B; 1 3C; 13D) and individual limiting sections 31; 32; 71; 72; 73; 74).

Claims (1)

1. Extendable shaft consisting of Inner shaft with peripheral surface; A tubular outer shaft with an inner edge surface and is installed on the inner shaft to be installed in it; At least one rail groove formed on the peripheral surface of the inner shaft to extend lengthwise; At least one rail groove formed on the inner surface of the outer shaft to be in the opposite direction of the inner shaft groove and many rolling parts that are flexibly clamped in between the inner shaft guide rail and The outer shaft with the outer shaft flexible return force in tag: