描述

[ Gear set for converting rotary motion to linear motion] This set can manufacture a rack & pinion mechanism that converts rotary motion to linear motion using gears. The pinion gear attached to a 3mm hexagon shaft such as a gear box has a clutch that protects the motor and gear when a large force is applied. It can be applied to various types of work, such as a forklift-like movement or sliding the gearbox itself. By combining this with a fun machine series universal arm, you can further expand the ingenuity of movement.

[Basic specifications] In addition to rack gear x 2, 42T pinion gear x 2, L-shaped arm x 4, with a length of about 170mm and width of about 10mm, a set of plastic nuts and screws.

The mechanism of the rack and pinion that converts Dr. Osuka’s trivial rotation movement into linear movement

Robots use various mechanisms called “mechanisms”, such as gears and link mechanisms. This time, let’s learn another mechanism called “rack and pinion”. A rack and a pinion literally use two types of parts, a “rack” and a “pinion” (Fig. 1). First, a rack is an elongated plate with teeth cut on the side as shown in Fig. 1. Pinions are small gears. There are several ways to learn about this rack and pinion.

One is that the diameter of the larger one of the combined two large and small gears is steadily increasing, and when it reaches the maximum size, it becomes almost straight at the end (Fig. 2 (a) )-(d)). The idea is that the linear gear at that time is called a “rack”, and the smaller gear is called a “pinion”.

* This column is excerpted from the text of ” Tamiya Robot School Mechanic Course (Application)”
In the textbook, a newly written column by Professor Koichi Osuga, Faculty of Engineering, Osaka University, gives children an easy-to-understand and fun explanation of machines and mechanisms.