SU1260614A1 - Ball-screw mechanism - Google Patents

Abstract

The invention relates to mechanical engineering and can be used in instrumentation and actuators of translational motion. The aim of the invention is to increase durability by removing the nut from engagement. For this, the mechanism containing a ball nut of two halves 1 and 2, placed on the screw 7 with the possibility of radial movement, has grooves on the inner surface of the nut halves and the outer surface of the screw, in which the torsion spring 4 is located. At the same time, it is placed between the balls in a flexible closed separator 5. When the halves 1 and 2 are disconnected, the torsion spring screw 4 deforms on the section of the separator 5 located in the working area of the nut, squeezing it together with the balls 6 to disengage them with the nut. 4 il. S (L 1C o o O) 4 Fig.)

Description

The invention relates to mechanical engineering and can be used in instrumentation and actuators of translational motion.

The aim of the invention is to increase durability by removing the nut from the hook.

Figure 1 schematically shows a ball screw mechanism; figure 2 - section aa in figure 1; on fig.Z - the ball nut is open when balls are removed from the radius troughs of the screw; Fig. 4 - section BB in fig.Z.

The mechanism contains a ball nut of two halves 1 and 2 with a plane of the connector, the passage of the necks through the nut axis, which can be mixed along the guides of the movable actuator 3 perpendicular to the axis of the nut. On the inner surface of the nut and the outer surface of the screw there are grooves in which the screw spring 4 is twisted and located in the screw grooves of the nut between the radial grooves of the flexible closed separator 5. Balls 6 are placed in the slots of the flexible closed separator 5 with grooves of two pov. juvin 1 and 2 nuts and screws 7.

Ball screw mechanism works as follows.

When the two halves 1 and 2 of the nut are screwed, the screw spring 4 is twisted unstrung, affecting a section of the flexible closed separator 5 located in the working area of the nut, pressing the latter together with the balls 6 installed in it in the radial direction from screw 7 to the full output of balls 6 from screw grooves 7.

/

five

Q

five

about

BUT

0

five

In the closed position of the two halves 1 and 2 of the nut, the deformable screw spring 4 of the torsion is in the compressed state.

Under the influence of a deformable torsion helical spring on the section of a flexible closed separator located in the working area of the nut, the diameter to which the separator covers the screw increases, which leads to an increase in the length of the specified section of the separator.

In order to compensate for the indicated change in the length of the section of a flexible closed separator located in the working area of the nut, the latter can be made of elastic material on the bridges between the sockets for the balls.

The ball nut is easy to manufacture and allows for the opening of the kinematic chain of the drive of translational movement, which increases the durability of mechanism B in general.

Claims (1)

Invention Formula A ball screw mechanism containing a screw, a nut interacting with it, a flexible closed separator with sockets and balls placed in the latter and screw and nut grooves, characterized in that, in order to increase durability by removing the nut from the engagement, the nut is made of two halves, mounted with the possibility of radial displacement, grooves are made on the inner surface of the nut and the outer surface of the screw, and the mechanism is equipped with a torsion spring installed between the balls in a flexible closed separator and screw grooves and nuts. z / z.2 % GL Editor M. Bandura Order 5210/33 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5 Branch PPP "Patent, Uzhgorod, st. Project, 4 Compiled by R. Ozhin Tehred I. VeresKorrektor A. Obruchar Circulation 880 Subscription