Analyze the presetting and utility of the flexibility of bolt installation facilities

1. The structural design of the retractable mechanism of the bolt installation mechanism

Adjust the position of the adjustable nut on the stud to achieve the purpose of expansion and contraction. At the same time, in order to prevent the position of the adjustable nut with a good length from changing, the adjusted nut is locked on the stud with a screw. At the position, the lower end of the fixing nut is milled into a quadrangular prism, which can fit with the mounting hole of the beam. This prevents the nut from rotating with the retractable bolt when the bolt is tightened, and achieves the purpose of tightening the bolt.

2. The working principle of the retractable mechanism

The specific operation is as follows: Measure the depth of the recess of the mounting hole through the mounting rod (a plastic rod with a length of 600mm and a length of 6 mm). The specific measurement method is to push the bolt mounting mechanism to the point of installation. Directly below the object, pass the cleaned installation rod through the hole of the object where the bolt is to be installed, and contact the nut mounting seat on the beam of the bolt installation mechanism, and turn the measuring rod to read the installation rod from the scale on the upper surface of the installation hole. The scale of the face on the object, the measured scale minus the thickness of the object at the mounting hole and the height of the fixing nut is the depth value of the recess of the mounting hole. Adjust the position of the limit nut on the screw to make the limit nut and the nut mounting seat The distance between the screw length and the total length of the nut seat is just less than the measured length of 3～5mm. The purpose is to facilitate the installation of the retractable nut seat on the beam, because the lifting range of the beam of the bolt installation mechanism is 0 ~8mm, after adjustment, use the screw to restrict the rotation on the screw through the groove on the screw, then screw the nut seat on the screw, and touch some butter on the side of the metal nut and the nut seat to prevent the nut from being installed due to the screw. When the bolt is screwed, the screw is installed in the beam hole with the limit nut, and the screw restricts the rotation of the screw in the limit nut. Because the screw is a hollow stud, it does not affect the length of the bolt, so the bolt It can only be tightened in the nut.

3. Correct use of retractable mechanism

In order to use the retractable mechanism correctly, the following points must be made: ①Before installing the bolts, choose the appropriate sleeve according to the diameter of the installed bolt; ②After the measurement, when calculating the actual length of the retractable, in order to It is convenient to install the installed nut. After the retractable mechanism is installed on the bolt installer, the upper end of the sleeve should have a gap of 2 to 3 mm from the mounting hole; ③In actual installation, in order to improve the installation efficiency, before stepping on the pedal , The measuring rod can be protruded from the mounting hole and inserted into the hole of the mounting nut before stepping on the foot pedal; ④Before using the wrench on the mounting hole, step on the foot pedal lightly with your foot and twist the bolt lightly by hand , After ensuring that the bolts are screwed into the nuts correctly, step on the pedals forcefully, when the hands cannot be screwed; then tighten them with a wrench; ⑤When stepping on the pedals, be slow, avoid excessive force and cut off the weak connection structure Pin at the location.

4, concluding remarks

In order to ensure the flexibility of the rotating parts of each mechanism, lubricating oil should be regularly filled in the mutually rotating parts and components. When the adjustable nut is locked with the jack screw, in order to prevent the jack screw from wearing the thread on the screw, the ratio Bolts with low hardness or aluminum jacks; at the same time, in order to align the mounting nut with the mounting hole as soon as possible, put the adjustable length of the retractable nut seat on the mounting nut, and use the mounting rod to insert the retractable nut seat from the top Step on the foot pedal after the screw hole, so that a lot of auxiliary time wasted due to the hole can be saved, and labor efficiency can be improved.