metron9
Aluminum
- Joined
- Oct 29, 2009
- Location
- Minnesota U.S.A.
I live in Minnesota, we have had three hot tubs in the last 30 years and many more hot tub covers. The covers typically are flat with crappy vinyl that the sun destroys after about 3 years. I was sitting in the hot tub this morning thinking about an automatic cover. Turns out the same idea i had is already being manufactured, see link. About $5,000 bucks.
Covana automated hot tub enclosure, gazebo, cover in action in the snow - YouTube
I am looking for ideas on a similar design. My idea is to use four 1/2 inch -10 ACME screws with a sprocket attached to each one and use a single drive motor and sprocket to spin the screws. The sprockets would be at ground level. I would use thrust bearings at the bottom of each screw.
The top that the 4 posts would lift would be designed using aluminum angle and double wall acrylic panels with a pitch that would allow the snow to slide off all in one direction. I have a 3000 sq foot greenhouse that sheds snow as it builds up and works very well. The heat loss from the hot tub cover in use would slightly heat the bottom of the panels that allows the snow to melt just a tiny bit creating a slippery slope as all the snow will just slide off.
Comments on design options, size of screws, linear track on each post etc welcome.
I am wondering about the chain size needed for 32 feet as it would be going around the entire base.
The Hot tub cover would use the same design as the greenhouse roof.
Covana automated hot tub enclosure, gazebo, cover in action in the snow - YouTube
I am looking for ideas on a similar design. My idea is to use four 1/2 inch -10 ACME screws with a sprocket attached to each one and use a single drive motor and sprocket to spin the screws. The sprockets would be at ground level. I would use thrust bearings at the bottom of each screw.
The top that the 4 posts would lift would be designed using aluminum angle and double wall acrylic panels with a pitch that would allow the snow to slide off all in one direction. I have a 3000 sq foot greenhouse that sheds snow as it builds up and works very well. The heat loss from the hot tub cover in use would slightly heat the bottom of the panels that allows the snow to melt just a tiny bit creating a slippery slope as all the snow will just slide off.
Comments on design options, size of screws, linear track on each post etc welcome.
I am wondering about the chain size needed for 32 feet as it would be going around the entire base.
The Hot tub cover would use the same design as the greenhouse roof.