High speed precision intermittent transmission mechanism
Intermittent transmission mechanism is widely used in the applications of high-precision high-speed machinery. With the development of automatic control technology, the requirements of the intermittent transmission mechanism in the precision, response speed and reliability are getting higher and higher. This paper discusses the research status and development direction of the intermittent transmission mechanism.
The intermittent transmission mechanism generally consists of three parts: deceleration mechanism, transmission mechanism and direct-acting mechanism. Among them, the deceleration mechanism is mainly composed of a gear pair, a brake and a brake connecting shaft. It mainly serves to reduce the speed to ensure that the speed of subsequent transmission mechanism is low enough. The transmission mechanism is mainly composed of a transmission gear shaft, a gear pair and a drive. Through the gear pair, the speed of transmission mechanism can be adjusted according to the different working conditions of the intermittent transmission mechanism, and the speed control range is wider. The direct acting mechanism mainly realizes the start and stop of the driving device.
In the design of intermittent transmission mechanism, a reasonable gear transmission pair should be selected according to the speed, output torque and accuracy requirements of the transmission mechanism, and the transmission ratio should be adapted to the specific work process. Besides, the friction coefficient of the transmission gear should be considered in the gear selection. On this basis, the gear teeth should be machined and polished, so as to make the gear play an optimal transmission effect. In addition, when transferring from one gear to another, there should be great softening force, in order to reduce the impact of gear meshing and avoid gear breakage.
In order to make the intermittent transmission mechanism safer and more reliable, the choice of its brake is also very important. Generally, electric brakes, pneumatic brakes and mechanical brakes can be used as brakes. When selecting brakes, the specific conditions, such as the drive current of motor, inertia size and acceleration, should be considered. For example, when the motors drive current is large enough, an electric brake should be selected. The mechanical brakes should be selected if the application requirements are higher.
In order to improve the accuracy and reliability of the intermittent transmission mechanism, the gear is usually integrated with high quality bearings. The control system of the transmission mechanism should be set up reasonably, and the control accuracy and reaction speed should be considered in the design.
In addition, the gearbox of the intermittent transmission mechanism also need to carry out dust-proof, waterproof and anti-rust measures, so as to prevent the dust, rain and other external environments from entering the gearbox, so as to reduce the failure rate of the gearbox and ensure the normal operation of the intermittent transmission mechanism.
In summary, the design of intermittent transmission mechanism is very important for its reliability and efficiency. The selection of gear, transmission mechanism, brake and control system, as well as the dust-proof, waterproof and anti-rust measures of the gearbox are essential for the normal operation of the transmission mechanism. Through comprehensive consideration of the mechanical design, control system design and other aspects, a reliable and efficient intermittent transmission mechanism can be obtained.
