A steering device

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Tarih:

2023-01-15 03:26:58

İlan No:

#1057

Açıklama;

A steering device alters the rotation of the steering mechanism into a linear motion of transmission thus increasing the steering force. The steering device is typically mounted on the frame or body of a vehicle, where steering force passes through it and changes direction of transmission, making it the most crucial core part of the steering system.

Rack-and-pinion, worm-crank-pin, and ball-and-nut steering systems are commonly used.

1. Rack and pinion steering: The most commonly used steering device, with the basic structure being a rack and pinion combined with a pair of intermeshing pinions. As the steering shaft turns the pinions, the rack moves in a straight line. The rack is sometimes used to steer the steering wheel by directly driving the track rod. As such, it is the simplest type of steering device. It possesses the merits of simple structure, low cost, highly sensitive and compact steering, and possibility of directly driving the track rods.

2. Worm-crank-pin: This steering device is made with a worm as the driving component and a crank pin as the follower. The worm is equipped with a trapezoidal thread, bearing the finger-shaped tapered finger pin on the crank, and integrating the crank with the shaft of the steering rocker. The worm is turned by the steering wheel when steering. The tapered finger pin in the spiral groove of the worm rotates freely while making circular motion along the steering rocker axis. Thus, the crank and steering arm are driven to swing, which deflects the steering wheel through the steering transmission mechanism. Such steering devices are normally applied to cargo vehicles with high steering forces.

3. Ball-and-nut steering: The main structure of the ball-nut type power steering is composed of two parts: the mechanical part and the hydraulic part. The mechanical part is made up of a housing, side covers, upper cover, lower cover, ball screw, rack and pinion nut, rotary valve spool, and fan gear shaft. There are two drive pairs: a screw rod and nut pair and a rack, fan, and fan gear shaft pair. By inserting a cyclically rotatable steel ball between the threaded rod and rack nut, sliding friction is converted to rolling friction, boosting transmission efficiency. The strengths of this type of steering lie in its user-friendly operation, minimized abrasion, and extended durability.

Product Category and Introduction

1. Rack and pinion steering: The rack uses 45cr steel, the gear shaft, steering shaft, valve sleeves, and tie rod outer ball heads are made of 40cr steel, and the tie rod dust covers consist of TPV thermoplastic vulcanized rubber. The steering housing bears aluminum or magnesium alloy die castings, which are lightweight, high in tensile strength, corrosion resistant, bendable, extrudable, and recyclable due to their low melting point. CNC lathes and machining centers have been implied Japanese-made Mazak machines, which offer high precision machining, low wear, easy operation, and long service life.

2. Worm-crank-pin: A worm is a special steel (composition: carbon, silicon, manganese, chromium, nickel, etc.) smelting, rolling, tempering, surface treatment, belt polishing, oiling, and polyethylene cloth packaging process control to ensure high tensile strength, low temperature impact endurance and stable hardness of the steel, making it suitable for general commercial vehicles.

3. Ball-and-nut steering: Structural and technical measures such as improved manufacturing precision, high smoothness of machined surfaces, and quenching and grinding the helix grooves of screw rods and nuts to provide sufficient hardness and wear resistance for long life are commonly employed in commercial vehicles.