They run quieter compared to the straight, especially at high speeds
They have an increased contact ratio (the number of effective teeth engaged) than straight, which escalates the load carrying capacity
Their lengths are nice circular numbers, e.g. 500.0 mm and 1,000.0 mm, for easy integration with machine bed lengths; Directly racks lengths are generally a multiple of pi., e.g. 502.65 mm and 1005.31 mm.
A rack and pinion is a kind of linear actuator that comprises a pair of gears which convert rotational movement into linear motion. This combination of Rack gears and Spur gears are generally called “Rack and Pinion”. Rack and pinion combinations tend to be used within a simple linear actuator, where the rotation of a shaft powered yourself or by a engine is converted to linear motion.
For customer’s that require a more accurate movement than normal rack and pinion combinations can’t provide, our Anti-backlash spur gears are available to be utilized as pinion gears with our Rack Gears.
The rack product range consists of metric pitches from module 1.0 to 16.0, with linear force capacities of up to 92,000 lb. Rack styles include helical, straight (spur), integrated and circular. Rack lengths up to 3.00 meters are available standard, with unlimited travels lengths possible by mounting segments end-to-end.
Helical versus Straight: The helical style provides a number of key benefits more than the straight style, including:
These drives are ideal for a wide selection of applications, including axis drives requiring specific positioning & repeatability, traveling gantries & columns, pick & place robots, CNC routers and material handling systems. Large load capacities and duty cycles can also be easily handled with these drives. Industries served include Material Handling, Automation, Automotive, Aerospace, Machine Device and Robotics.
Timing belts for linear actuators are usually manufactured from polyurethane reinforced with internal metal or Kevlar cords. The most common tooth geometry for belts in linear actuators may be the AT profile, which includes a sizable tooth width that provides high resistance against shear forces. On the driven end of the actuator (where in fact the engine is usually attached) a precision-machined toothed pulley engages with the belt, while on the non-driven end, a flat pulley simply provides guidance. The non-powered, or idler, pulley is certainly often used for tensioning the belt, although some designs offer tensioning mechanisms on the carriage. The kind of belt, tooth profile, and applied tension pressure all determine the drive that can be transmitted.
Rack and pinion systems used in linear actuators contain a rack (also referred to as the “linear equipment”), a pinion (or “circular gear”), and a gearbox. The gearbox helps to optimize the speed of the servo motor and the inertia match of the machine. One’s teeth of a rack and pinion drive could be directly or helical, although helical the teeth are often used because of their higher load capacity and quieter operation. For rack and pinion systems, the maximum force that can be transmitted is definitely largely dependant on the tooth pitch and how big is the pinion.
Our unique knowledge extends from the coupling of linear system components – gearbox, motor, pinion and rack – to outstanding system solutions. We offer linear systems perfectly made to meet your specific application needs when it comes to the easy running, positioning precision and feed pressure of linear drives.
In the study of the linear movement of the gear drive mechanism, the measuring system of the gear rack is designed to be able to measure the linear error. using servo engine straight drives the gears on the rack. using servo engine directly drives the apparatus on the rack, and is based on the motion control PT point mode to linear gearrack china realize the measurement of the Measuring range and standby control requirements etc. In the process of the linear motion of the apparatus and rack drive mechanism, the measuring data can be obtained by using the laser interferometer to measure the position of the actual motion of the gear axis. Using the least square method to resolve the linear equations of contradiction, and also to extend it to any number of moments and arbitrary amount of fitting features, using MATLAB programming to obtain the actual data curve corresponds with design data curve, and the linear positioning accuracy and repeatability of gear and rack. This technology could be extended to linear measurement and data analysis of nearly all linear motion mechanism. It can also be used as the basis for the automatic compensation algorithm of linear motion control.
Comprising both helical & straight (spur) tooth versions, within an assortment of sizes, components and quality levels, to meet almost any axis drive requirements.