Axially telescopic automatic tightening mechanism

Abstract

The invention provides an axially telescopic automatic tightening mechanism which comprises a bottom plate assembly, a stand column, an air cylinder assembly, an axial telescopic mechanism, a slidingtable assembly and a tightening gun assembly. The air cylinder assembly is installed above the bottom plate assembly through the stand column, the axial telescopic mechanism is arranged at one side ofthe air cylinder assembly, the axial telescopic mechanism is connected with the sliding table assembly, and the tightening gun assembly is arranged on the sliding table assembly, wherein an air cylinder of the air cylinder assembly is in an extending-out state in a non-tightening state; and after an engine enters a station and falls down, the air cylinder starts to retract, the axial telescopic mechanism drives the sliding table assembly to move through elastic force compression, when the axial telescopic mechanism makes contact with the head of a crankshaft belt pulley bolt, the air cylinderstill continues to retract, and the axial telescopic mechanism further compresses and stores energy till tightening is completed. The axially telescopic automatic tightening mechanism can guarantee that the tightening gun has stable pressing force on the bolt in the tightening process, consistency and stability and reliability are improved, the size is small, and cost is low.

Description

Technical field [0001] The present invention relates to an automatic tightening mechanism, and more particularly to an axial scalable automatic tightening mechanism. Background technique [0002] At present, the crank pulley bolts in the engine assembly are tightened to be manually tightened, and tighten guns are mounted on the slide through the holder, and the employee people are pushing the slide to the sleeve into the crank leather pulley bolts. Tighten. Although the industry is moving in the industry, there are also automatic tightening, but mostly combined with the tightening axis and servo motors with the combination of screws or multi-axis robots, equipment cost is generally higher. Therefore, the automatic tightening mechanism for engine assembly in the prior art mainly has the following problems: First, there is a quality risk, when the manual is tightened, the manual holding a gun tightening bolt, the tightening process is unstable due to the state of employee, the gun ...

AI Technical Summary

Problems solved by technology

Therefore, the automatic tightening mechanism used for engine assembly in the prior art mainly has the following problems: first, there is a quality risk. When manually tightening, the tightening gun is manually held to tighten the bolts. The coaxiality of the bolts cannot be guaranteed, the consistency is poor, and there is a risk of torque out of tolerance

Second, the utilization rate of employees' operating time is low. The feeding action of the tightening gun relies on manual operation by employees and the crankshaft pulley bolt tightening process is close to 4 seconds. The long waiting time of employees is wasteful, the utilization rate of employees' operating time is low, and the production efficiency is not high enough.

Third, if the automation transformation is carried out by referencing servo motors or robots, the structure is complex and the cost is high

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