Synchronous belt drive has the common characteristics of belt drive, chain drive and gear drive at the same time, so it is widely used in mechanical engineering and the purpose is constantly expanding. Since the synchronous belt drive transmits motion and power through the meshing of the belt teeth and the gear teeth, the improvement of the existing tooth shape and the development and research of the new tooth shape have been one of the focuses of domestic and foreign scholars. In order to improve the research effect, shorten the trial production cycle, and bring the new product to the market as soon as possible, people are trying to use modern computer. Through the simulation research technology of the synchronous belt drive system, the i1 accuracy of the design of the new gear belt drive structure parameters is verified, so as to reduce the repetitive trial production in the development process of the new gear belt drive, reduce the cost and improve the efficiency.
Based on the profile parameters of the new type of flat-top circular arc tooth synchronous belt, this paper analyzes the meshing principle of the new type of high-tooth synchronous belt by optimizing the tooth height and improving the structure of the tooth tip. The results show that the theoretical analysis is correct and the structural parameters are feasible.
The tooth shape of the high tooth synchronization belt
In order to improve the bearing capacity and service life of the synchronous belt, reduce the transmission noise and improve the motion accuracy, the tooth shape of the new flat-top circular arc tooth synchronous belt is improved, and a new high circular arc tooth synchronous belt is designed. Compared with the traditional circular arc tooth synchronous belt tooth profile, this high profile circular arc tooth synchronous belt tooth profile has the following main features:
(1) The belt tooth height is 14.75% larger than the traditional STPD arc tooth height, which increases the contact area and meshing pressure Angle between the belt tooth and the gear tooth, thus improving the bearing capacity of the synchronous belt under the condition of constant unit bearing strength
(2) The height of the belt teeth is 6.06% larger than the height of the gear teeth, so as to reduce the pressure between the belt teeth and the top of the gear teeth, improve the wear state between the belt teeth and the stress state of the bearing layer, and improve the life of the belt
(3) There are four slots with the tooth tip, which can exclude air when the belt engages with the wheel and reduce noise. At the same time, the body groove can also deform the top part of the tooth, forming an elastic tooth tip, reducing the meshing impact and improving the meshing state.
conclusion
(1) Through calculation and simulation, this paper analyzed and compared the design tooth profile of the new high-tooth synchronous belt with the calculated tooth profile of the belt wheel (that is, the calculated tooth profile of the belt wheel), and found that the two match perfectly, and the design tooth profile of the belt wheel is also consistent with the calculated tooth profile of the belt wheel (that is, the calculated tooth profile of the belt wheel). This shows that the design tooth profile of the new high tooth synchronous belt and pulley is reasonable, and the close fit degree can be achieved during transmission.
(2) It can be seen from the drawn joint wheel tooth profile that the transition curve of the tooth profile of the die hob and the belt wheel hob does not appear sharp corners, and the tooth profile is smooth and continuous, and the phenomenon of ten or root cutting is avoided during the processing.
(3) Through the dynamic simulation of the transmission process, the meshing ten in the incomplete meshing process of the synchronous belt transmission can be intuitively and qualitatively analyzed