Neck tightening device for connecting automobile air-conditioning pipes

Abstract

The invention discloses a necking-down tightening device for automobile air conditioner pipe connection. The device comprises a base and a necking-down sleeve fixedly installed on the base, a necking-down device is installed inside the necking-down sleeve and connected with a driving device, the necking-down device comprises a rotary bearing fixedly installed in the necking-down sleeve, a necking-down clamping plate is connected to the inner ring of the rotary bearing through a telescopic rod, a circular-truncated-cone-shaped necking-down cavity is formed inside when the necking-down clampingplate is folded, a reset spring is connected between the necking-down clamping plate and the inner ring of the rotary bearing, a driving shrinkage barrel makes contact with the outer surface of the necking-down clamping plate, a shrinkage cavity is formed in the driving shrinkage barrel, the driving shrinkage barrel is movably installed on the inner wall of the necking-down sleeve through a movable bearing, and a movable groove is arranged on the driving shrinkage barrel. By means of the necking-down tightening device, firm fixing of an air conditioner pipe is achieved, uniform stress of the air conditioner pipe in necking-down operation is ensured, and the necking-down quality of the air conditioner pipe is greatly improved.

Description

technical field [0001] The invention relates to the field of automobile production and processing, in particular to a necking and tightening device for connecting automobile air-conditioning pipes. Background technique [0002] The automotive air conditioning system is a device that cools, heats, ventilates and purifies the air in the cabin. It can provide a comfortable riding environment for the passengers, reduce the driver's fatigue intensity and improve driving safety. [0003] Modern air conditioning system consists of refrigeration system, heating system, ventilation and air purification device and control system. Different types of air conditioning systems are arranged in different ways. Cars are widely used in the cooling and heating integrated air conditioning system. Its layout type is to assemble the evaporator, warm air radiator, centrifugal blower, operating mechanism, etc. together, which is called the air conditioner assembly. In the automobile air-conditi...

AI Technical Summary

Problems solved by technology

[0006] (1) During the use of the necking and tightening device used for the connection of automobile air-conditioning pipes in the prior art, the force on each part of the air-conditioning pipe is uneven, resulting in deformities at the necking of the air-conditioning pipe, which greatly reduces the tension of the air-conditioning pipe. The quality of the necking is not conducive to the connection of the air-conditioning pipe in the later stage;

[0007] (2) The necking and tightening device used for the connection of automobile air-conditioning pipes in the prior art fails to effectively fix the air-conditioning pipes during use, and the air-conditioning pipes are prone to shift during the shrinking process, resulting in air-conditioning The necking position of the tube is shifted, which greatly reduces the quality of the necking

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