Shaft and rod micro-clearance direct-connection technology

Abstract

The invention relates to a micro-interval shaft lever direct connection method which reserves intervals at the connection of the shaft and the lever, thus eliminates the deviation caused by offset and an included angle between a shaft central line and a lever central line, eliminates the deviation caused by shaft radial direction jump and axial direction endplay, eliminates the bad factors brought by assembly location deviation, enables the lever not to shake and not to generate the bad reaction force, and greatly improves the transmission stability and efficiency. It is important to obtain the reserved intervals. Though interference fit of the shaft lever, the farthest end shaking amplitude of the lever is measured after running, namely the shaking maximum diameter is R, the lever length is set as L, alpha is obtained according to tg alpha=R / 2L, the length of the shaft into the lever is set as x, then the reserved interval r of the shaking part is x*sina alpha, the alignment deviation caused by the assembly is set as y, then the minimum interval between the shaft and the lever is x*sina alpha+2y, and normally unpredictable interval z of 0.01-0.05mm is also needed to improve the reliability.

Description

technical field [0001] The invention relates to the field of mechanical transmission, and is applied to situations where space is required and energy loss needs to be reduced. Background technique [0002] With the continuous improvement of mechanical automation, mechanical transmission has become an indispensable element, and the efficiency, complexity and reliability of transmission have become the focus of everyone's attention. The more common transmission methods are: belt drive, chain drive and The characteristic of gear transmission is that it can carry out power transmission and direction change, and at the same time alleviate the vibration and deviation during transmission. However, there is an intermediate structure, which is more difficult for limited space. The typical example is the power transmission between the motor drive shaft and the long rod. Is it feasible to directly connect the drive shaft to the long rod? Practice has proved that there is a little jitt...

AI Technical Summary

Problems solved by technology

The method is to make a hole matching the shaft at the end of the rod, requiring the shaft to be non-cylindrical (such as D-shaped, double D-shaped), the center of the arc surface of the hole is concentric with the rod, and a gap is reserved between the hole and the shaft to eliminate the shaft. There is a deviation caused by the deviation and angle between the center line and the center line of the rod, which eliminates the deviation caused by the radial runout and axial movement of the shaft, eliminates the adverse factors caused by the assembly positioning deviation, and solves the problem of direct connection between the shaft and the long rod. The problem of multiplying errors

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