A welding device for third and fourth gear shift fork shafts

Abstract

The invention discloses a welding device for a three-gear and four-gear shifting fork shaft. The welding device comprises a sealed welding box, a shaft lever feed device, a gear shifting guide block feed device, a vacuumizing device, a controller and a drive motor, wherein a welding die, an arc welding machine and a moving mechanism used for controlling the arc welding machine to move are arranged in the welding box, the shaft lever feed device and the gear shifting guide block feed device are communicated with the welding box, the vacuumizing device and the controller are arranged on the welding box, an observation window is arranged on the operating face of the welding box, rolling curtain cloth is arranged above the observation window, and two operation gloves are arranged below the observation window. The drive motor is used for driving the rolling curtain cloth to be rolled down to seal the observation window before welding and to be rolled up after welding, and electrically connected with the controller. The welding device has the advantages that an operator places a shaft lever and a gear shifting guide block to the designed positions on the welding die by means of the operation gloves, then the controller controls the drive motor to roll the rolling curtain cloth down to seal the observation window, under the vacuum condition, the connecting portion of the shaft lever and the gear shifting guide block is welded, the situation that the high-temperature part of the shaft lever is oxidized in the welding process is avoided, and injuries to eyesight of the operator in the welding process can be prevented.

Description

technical field [0001] The invention relates to the field of production equipment of auto parts, in particular to a welding device for third and fourth gear shift fork shafts. Background technique [0002] The third and fourth gear shift fork shaft of the automobile gearbox is a shift fork shaft used to switch between the third gear and the fourth gear. The existing third and fourth gear shift fork shafts have the shift guide block of the shift fork shaft and the shaft as a whole. On the one hand, the structure of the mold is complex, and the thickness of the connection between the shift guide block of the shift fork shaft and the shaft rod of the shift fork shaft is relatively thick, and the cooling time is later than other parts, resulting in weak connection and fatigue after long-term use. The latter is easy to break, which poses a safety hazard; or a collar is set at the tail of the shift guide block of the shift fork shaft, and the collar is set on the shaft of the shif...

AI Technical Summary

Problems solved by technology

[0002] The third and fourth gear shift fork shaft of the automobile gearbox is a shift fork shaft used to switch between the third gear and the fourth gear. The existing third and fourth gear shift fork shafts have the shift guide block of the shift fork shaft and the shaft as a whole. On the one hand, the structure of the mold is complex, and the thickness of the connection between the shift guide block of the shift fork shaft and the shaft rod of the shift fork shaft is relatively thick, and the cooling time is later than other parts, resulting in weak connection and fatigue after long-term use. The latter is easy to break, which poses a safety hazard; or a collar is set at the tail of the shift guide block of the shift fork shaft, and the collar is set on the shaft of the shift fork shaft and fixed with the shaft by screws. This structure can simplify the mold , but on the one hand there are many consumables, on the other hand, the long-term vibration of the car may cause the screws to loosen, so that the shift guide block of the shift fork shaft is separated from the shaft rod of the shift fork shaft, resulting in failure to shift gears

In view of the above situation, the designers comprehensively improved the production process, manufactured the shift guide block of the shift fork shaft and the shaft rod of the shift fork shaft separately, and then welded the shift guide block of the shift fork shaft to the shaft rod of the shift fork shaft by electric welding. The above disadvantages can be avoided at the same time. However, the existing welding devices are all open-type. During electric welding, the high-heat part of the shift fork shaft will be oxidized when it contacts with air, resulting in excessive deformation of the shift fork shaft and scrapped. At the same time, when welding The bright light will also cause damage to the eyesight of the operator, which needs to be improved urgently

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