Backside Idler Pulley
A backside idler pulley includes a first member forming a first side wall of a circumferential groove of the backside idler pulley and a second member, formed separately from the first member, and forming a second side wall, opposite the first side wall, of the circumferential groove of the backside idler pulley. The first member and the second member form first and second floor supports, respectively. The backside idler pulley further includes a continuous layer between the first side wall and the second side wall, the continuous layer being supported by the first and second floor supports while forming a floor of the groove.
1 . A backside idler pulley comprising:
a first member forming a first side wall of a circumferential groove of the backside idler pulley and forming a first floor support;
a second member, formed separately from the first member, and forming a second side wall, opposite the first side wall, of the circumferential groove of the backside idler pulley and forming a second floor support; and
a continuous layer between the first side wall and the second side wall, the continuous layer forming a floor of the groove, and supported by the first floor support and the second floor support.
2 . The backside idler pulley of claim 1 , wherein the continuous layer comprises an endless belt supported by the first member and the second member between the first side wall and the second side wall.
3 . The backside idler pulley of claim 1 , wherein the continuous layer comprises a metal band supported by the first member and the second member between the first side wall and the second side wall.
4 . The backside idler pulley of claim 1 , wherein the first floor support and the second floor support abut along a circumferential seam between the first side wall and the second side wall and wherein the continuous layer extends across the seam.
5 . The backside idler pulley of claim 4 , wherein the continuous layer comprises a coating filling the seam and extending across the seam to form a smooth surface between the first side wall and the second side wall.
6 . The backside idler pulley of claim 4 , wherein the continuous layer comprises a tape secured to the first member and the second member across the seam.
7 . The backside idler pulley of claim 4 , wherein the continuous layer comprises an endless belt.
8 . The backside idler pulley of claim 7 , wherein the endless belt is elastomeric and is stretched about a rotational axis of the pulley.
9 . The backside idler pulley of claim 4 , wherein the continuous layer comprises a metal band.
10 . The backside idler pulley of claim 1 , wherein the first floor support and the second floor support are separated in a direction along a rotational axis of the pulley and wherein the continuous layer comprises a band bridging between the first floor support and the second floor support while forming a floor of the groove.
11 . The backside idler pulley of claim 1 , wherein the continuous layer has a width of at least 50% of the spacing between the first side wall and the second sidewall.
12 . The backside idler pulley of claim 1 , wherein the floor is perpendicular to the first side wall and the second sidewall.
13 . The backside idler pulley of claim 1 further comprising at least one retention groove in at least one of the first side wall and the second sidewall, wherein the continuous layer is received within the at least one retention groove.
14 . The backside idler pulley of claim 1 , wherein the continuous layer has a U-shaped cross-section.
15 . The backside idler pulley of claim 1 further comprising a protuberance projecting above the first floor support or the second floor support, wherein the continuous layer extends over and receives the protuberance.
16 . The backside idler pulley of claim 16 , wherein the continuous layer comprises a preformed cavity receiving the protuberance.
17 . The backside idler pulley of claim 16 , wherein the continuous layer is compressible to deform about the protuberance.
18 . A mower comprising:
a prime mover having a power takeoff;
a deck;
a cutting blade supported by the deck;
a drive belt; and
a pulley arrangement configured to direct the drive belt from the power takeoff of the prime mover to at least one drive pulley connected to the cutting blade, wherein the at least one drive pulley engages a front side of the drive belt and wherein the pulley arrangement comprises a backside idler pulley, the backside idler pulley comprising:
a first member forming a first side wall of a circumferential groove of the backside idler pulley and a first floor support;
a second member, formed separately from the first member, and forming a second side wall, opposite the first side wall, of the circumferential groove of the backside idler pulley and a second floor support; and
a continuous layer between the first side wall and the second side wall, the continuous layer forming a floor of the groove and supported by the first floor support and the second floor support, wherein the floor is in engagement with a backside of the drive belt.
19 . A method comprising:
connecting two separate members to form first and second opposing side walls of a backside idler pulley and first and second floor supports; and
providing a continuous layer between the first and second opposing side walls over the first and second floor supports, the continuous layer forming a floor of a circumferential groove of the backside idler pulley.
20 . The method of claim 19 , wherein providing the continuous layer between the first and second opposing side walls comprises positioning an endless belt between the first and second opposing side walls, the belt having a face forming the floor of the circumferential groove of the backside idler pulley.