Screw nut seat function is what?

screw nut seat function is what?

The turret nut device is also called a turret transmission device. It is mainly used to convert rotary advance to linear advance or linear advance to rotary advance. According to the relative forward combination of the turret and the nut, there are four basic transmission forms. The infinite structure of nuts is mainly divided into inner infinite and outer infinite. The outer infinite also includes the ring groove type, the sleeve type and the end cover type. Next, Zero Love Xiaobian will work with you to gain an in-depth understanding of the turret nut drive equipment and infinite ways.

According to the relative forward combination of the turret and the nut, the basic transmission forms include the following four types: (1) Nut fixing, turret rotation and advancement (2) Rotation of the turret, nut advancement (33) Nut rotation, rotary frame forward (4) Turret fixation, nut rotation and advancement. There are several connection methods:12) Connect with nut flange and screw nut seat, and lock with bolts;2) Put the nut into the screw nut seat and fix it with the key;3) Screw the nut into the thread of the nut holder. nut infinite structure:

Infinity inside. The body in the inner infinite mode is always in contact with the turret surface during the infinite process. The reverser is installed in the side hole of the nut to connect the adjacent raceways. The reverser is used to guide the body through the top of the turret and into the adjacent raceway, forming an infinite loop. Usually, install on the same nut2~4ball reverser, and evenly distributed along the circumference of the nut. The advantage of the inner infinite mode is that the body infinite loop is short and smooth, and the radial dimension of the nut is small. Its disadvantage is that the reverser is difficult to process, and it is not convenient to assemble and debug.

Externally unlimited. When the ball loops, a part of it breaks away from the thread raceway and is infinite inside or outside the nut. According to the structure can be divided into three types: ring groove type, sleeve type and end cover type.① Ring groove type. The ring groove is milled on the outer cylindrical surface of the nut. Two through holes are drilled at both ends of the groove, which are tangent to the rolling surface of the circle. Two ball retainers are installed in the loop raceway to guide the balls through the two holes. At the same time, the groove is covered by the sleeve to form a body infinite loop.

② Canned. The bend is used to replace the looped groove. The ends of the bend are inserted into two inner holes tangent to the thread raceway. The end of the bend leads the body into the bend, forming a body infinite loop. Then fix the elbow with the pressure plate and screws. The sleeve type has a simple structure and is easy to manufacture, but the radial size is large. When used as a body plug, the end of the elbow is easy to wear.

③ Type of end cover. Longitudinal holes are drilled in the nuts to serve as roller return raceways. The two ends of the nut are fitted with two sector covers or sleeves. The return raceway of the balls is located on the cover plate. The raceway radius is the body diameter1.4～1.6Times.