Hound Mechanics Part I

One of the Hound goals was the low cost and a short development time. To achieve this it was decided not to design a chassis and work on top of a RC car chassis. This reduced the development time and avoided all the prototyping extra costs.

chassis

Crawler Chassis

We used not only the mechanical components but also the driving electronics like the electronic speed controller (ESC) and steering Servo. This meant that we had to work with a Ackerman style steering which has is advantages like an easier driving algorithm but also some disadvantages like the short turn ratio usual to this type of steering.

chassis

Chassis top view

Another main mechanical component is the camera arm which will be discussed in mechanics Part II. The arm was 3D designed from scratch in order to elevate the camera and be as effective as possible by maintaining the 2 servos in the base.

Arm test

Arm test

Since the main part of Hound was the ability to see, the camera had to had at least 2DOF of movement, so a pan/tilt system was installed in the arm so that the user could see various angles in front of the vehicle. Was used 2 standard hobby servos.
Pan Tilt Close up

Pan Tilt Close up

The base between the electronics and the chassis was made using a 3.3mm acrylic reinforced with 2mm aluminum bars to prevent flex while moving.
In part II we will discuss the Arm, chassis cover and the pro/con of choosing a Crawler chassis.

 

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