Auger device of snowplow

Abstract

[Task] To improve the ability of side disks to cut into a snow surface while ensuring the rigidity of the side disks[Solution] An auger device of a snowplow includes a pair of side disks (35), wherein each of the side disks (35) includes an annular outer circumferential edge portion (91), an annular outer flat plate portion (92) arranged closer to an inside in a prescribed direction than the outer circumferential edge portion (91), an annular inner flat plate portion (93) arranged closer to the inside in the prescribed direction than the outer flat plate portion (92), an annular outer connecting portion (95) connecting the outer circumferential edge portion (91) and the outer flat plate portion (92), and an annular inner connecting portion (96) connecting the outer flat plate portion (92) and the inner flat plate portion (93).

1 . An auger device of a snowplow, comprising:
 an auger housing;   an auger shaft supported by the auger housing so as to be rotatable around an axial line extending in a prescribed direction;   an auger claw fixed to the auger shaft; and   a pair of side disks arranged on both outsides of the auger claw in the prescribed direction and fixed to the auger shaft,   wherein each of the pair of side disks includes:   an annular outer circumferential edge portion;   an annular outer flat plate portion arranged closer to an inside in the prescribed direction than the outer circumferential edge portion and having a smaller outer diameter than the outer circumferential edge portion;   an annular inner flat plate portion arranged closer to the inside in the prescribed direction than the outer flat plate portion and having a smaller outer diameter than the outer flat plate portion;   an annular outer connecting portion connecting the outer circumferential edge portion and the outer flat plate portion; and   an annular inner connecting portion connecting the outer flat plate portion and the inner flat plate portion.   
     
     
         2 . The auger device of the snowplow according to  claim 1 , wherein the outer connecting portion and the inner connecting portion are inclined inward in a radial direction toward the inside in the prescribed direction. 
     
     
         3 . The auger device of the snowplow according to  claim 1 , wherein an interval in the prescribed direction between the outer circumferential edge portion and the outer flat plate portion is narrower than an interval in the prescribed direction between the outer flat plate portion and the inner flat plate portion. 
     
     
         4 . The auger device of the snowplow according  claim 1 , further comprising a pair of connecting members connecting the auger shaft and the pair of side disks,
 wherein each of the pair of connecting members includes a plurality of connecting shafts extending in a radial direction of the auger shaft in a side view,   surface areas of the outer flat plate portion and the inner flat plate portion are larger than surface areas of the outer circumferential edge portion, the outer connecting portion, and the inner connecting portion, and   an end portion of each of the plurality of connecting shafts on an outside in the radial direction is joined to the outer flat plate portion or the inner flat plate portion.   
     
     
         5 . The auger device of the snowplow according to  claim 4 , wherein the end portion of each of the plurality of connecting shafts on the outside in the radial direction is joined to the outer flat plate portion. 
     
     
         6 . The auger device of the snowplow according to  claim 5 , wherein a width in a radial direction of the outer flat plate portion is wider than a width in a radial direction of the inner flat plate portion. 
     
     
         7 . The auger device of the snowplow according  claim 1 , wherein the auger housing includes a pair of side plates that rotatably support the auger shaft,
 each of the pair of side plates includes:   a first flat plate portion defining an outermost surface in the prescribed direction;   a second flat plate portion arranged closer to the inside in the prescribed direction than the first flat plate portion;   a third flat plate portion arranged closer to the inside in the prescribed direction than the second flat plate portion;   a first connecting portion connecting the first flat plate portion and the second flat plate portion; and   a second connecting portion connecting the second flat plate portion and the third flat plate portion, and   each of the pair of side disks is arranged on the inside in the prescribed direction of each of the pair of side plates, and the outer circumferential edge portion, the outer flat plate portion, the inner flat plate portion, the outer connecting portion, and the inner connecting portion of each of the pair of side disks are opposed at an interval to the first flat plate portion, the second flat plate portion, the third flat plate portion, the first connecting portion, and the second connecting portion of each of the pair of side plates, respectively.   
     
     
         8 . The auger device of the snowplow according to  claim 7 , wherein the outer circumferential edge portion of each of the pair of side disks is arranged on a same plane as the second flat plate portion of each of the pair of side plates, and
 the outer flat plate portion of each of the pair of side disks is arranged on a same plane as the third flat plate portion of each of the pair of side plates.