3) Worm gear crank finger pin type steering racks
In terms of combination structure, the main combination system of worm gear crank finger pin type steering gear includes five types: First, the steering worm of the car. The second is the side cover of the car. Third, the finger pins of the car. Fourth, is the crank of the steering arm. Fifth is the housing of the steering rack. In this combined system of the steering gear, its housing is fixed, usually firmly placed on top of the safety bracket of the steering gear, and in the interior of the housing, it is equipped with the corresponding transmission subassembly. In the steering drive, the active part of the steering gear is the steering worm of the car, the steering structure system presents a trapezoidal cross-section thread, the steering worm is usually supported on two ball bearings (these two bearings are set on the sides of the steering gear housing), the steering gear finger pin is set on the end of the rocker arm crank, it belongs to a follower. If a car is equipped with such a steering gear, during the driving and steering process, the driver will drive the steering worm through the steering wheel, so that the steering gear will rotate with the car pins it engages, and at the same time, the radius of the car’s rotation must be the crank, and the threaded groove of the car worm will carry out circular motion around the axis of the rocker’s arm, thus driving the car’s crank and allowing the steering rocker arm to The crank of the car is driven so that the steering arm can implement a scientifically controlled oscillation, thus enabling the car to achieve safe steering.
Advantages and disadvantages of worm gear crank finger pin type automotive steering gear
The advantage of the worm crank finger pin type of car steering means that it will work well under the action of complete rolling friction, the operation is very simple and flexible, the transmission efficiency is relatively high because it is the use of segmented steering shaft, so the application of the entire vehicle arrangement work and maintenance is more convenient, but also help to improve the safety of the vehicle driving. It is understood that, and other steering applications, compared with the configuration of this steering vehicle often in the driving of the reversal of the transmission efficiency is lower, therefore, the impact of the road will not be too much to the car steering wheel, there is good stability. In addition, this type of steering gear is simple to manufacture and easy to maintain.
The disadvantages are not negligible, because compared with other steering gears, this type of steering gear is a large device, its size is relatively large, so it will lead to the arrangement of work is not very convenient