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== Mechanical parts == | == Mechanical parts == | ||
Some prototypes of mechanical parts needed for the machine. First, an open differential. This prototype does not yet have a locking capability (this is done by locking one of the drive axles onto the ring gear). | Some prototypes of mechanical parts needed for the machine. First, an open differential. This prototype does not yet have a locking capability (this is done by locking one of the drive axles onto the ring gear). Another required part was a u-joint. This one has been made using 4mm locking nuts & metal rods (which eventually will be sealed in the pla), thereby allowing it to be secured onto a threaded rod. | ||
<gallery> | |||
File:OpenDifferential.jpeg | |||
File:U-Joint.jpeg | |||
</gallery> | |||
== Differential prototype == | == Differential prototype == | ||
Revision as of 13:19, 8 April 2022
| RC Crawler | |
|---|---|
 | |
| Participants | |
| Skills | 3D Printing, Electronics, RC, Mechanics, Metal working |
| Status | Info gathering |
| Niche | RC |
| Purpose | Electronics, fun, world domination |
| Tool | No |
| Location | |
| Cost | |
| Tool category | Fabrication |
RC Crawler Property "Tool Image" (as page type) with input value "File:{{{Picture}}}" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process. {{{Picture}}} {{#if:No | [[Tool Owner::{{{ProjectParticipants}}} | }} {{#if:No | [[Tool Cost::{{{Cost}}} | }}
Description
The idea is to create a remotely controlled rock crawler, based on an 8x8 chassis for shits & giggles. Yes, this is heavily inspired by snowrunner.
Planned Featureset
- 8x8 drivetrain
- 3 steerable axles
- remotely lockable differentials
- remotely switchable hi-lo gearbox
- double-wishbone individual suspension
- pan/tilt FPV camera
Drivetrain
The following drivetrain will be configured, with a two-way gearbox and lockable differentials. Both switching gears and locking the diffs should be possible remote.
Motor
TBD; This will need to be a motor with a high amount of windings so that it will generate a lot of torque with a low RPM. This likely limits the choice to brushed motors.
Gearbox
Since I want to be able to have multiple gears, some gearbox needs to be built. For this, the following layout has been designed
How this works: The motor will drive the motor gear. This gear drives the first reduction gear, and the axle of this reduction gear drives the gearbox. Using a servo, both LO and HI gearing can be chosen.
The first prototype of this looks like this. Note that this does not include the motor gear nor the motor. This will be built on top of this construction:
Mechanical parts
Some prototypes of mechanical parts needed for the machine. First, an open differential. This prototype does not yet have a locking capability (this is done by locking one of the drive axles onto the ring gear). Another required part was a u-joint. This one has been made using 4mm locking nuts & metal rods (which eventually will be sealed in the pla), thereby allowing it to be secured onto a threaded rod.
Differential prototype
A working lockable differential has been built. Locking is done by sliding a lock between the axle and the ring gear (using a servo, not pictured below).
