Hi, my team 1876B and the other school team 1876A are having problems with our lifts. we have 4 bar lifts and ours was working fine until yesterday. Yesterday the motor mechanism broke and the gears are grinding. I am wondering if there is another way to mount the motors and gears. i will be posting a picture later because I do not have a picture on this computer. thanks for all the help people!
You should support the axles on both sides, otherwise they will slip extremely easily
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As a general rule, all axles should be supposed on both sides, especially when under high loads. I would recommend adding a second post to each side of you lift to suppor the other side of each axle. Additionally, I would recommend that you add support to the other side of each of your wheel axles, as not supporting them could lead to bent axles.
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as mentioned earlier, you’re going to want to support your axles on both sides. not only with your lift, but with your drive as well. And you really really want to be having more bracing on that life, a single c channel screwed in to the side like that will provide very little structural support.
Also I want to question why your gearbox is so low on your robot. you could really be powering it from much higher.
here’s a good example of a solid lift mount:
notice a few things:
each side of the lift has 2 support towers on either side of the arm. The support towers are relatively close to one another, and are brace in multiple places, both to each other, back of the base, and the front. This is important so that the towers can’t wobble around.
Also notice how each side of the lift gets powered. If you’re doing a 2 motor lift, this is the best way, so that one side of the lift doesn’t have to pull up the other.
Also notice that the arm itself and the large gear are mounted on a screw joint, not an axle. This isn’t super important, but it’s a much sturdier joint with less friction and slop compared to an axle.
Additionally, you can look at the drive to see various ways to brace and support it properly, which is equally, if not more, important to do than the lift.
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It might just be me, but those linkages don’t look parallel. This causes the mechanism that is being lifted to tilt a bit. This isn’t necessarily a bad thing if you know what you are doing though. It also looks to be outside the size limit.
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