SU1317212A1 - Ball screw gearing - Google Patents

Abstract

The invention relates to mechanical engineering, namely to ball screw gears. The purpose of the invention is to improve the manufacturability of the nut by making its helical groove of a cylindrical helix wound from a tube and then bored through the inner diameter to an average diameter of the tube, as well as improving durability by compensating for the wear of the balls by changing the length of the recirculation channel. The cylindrical helix 2 and its ends 6, which in the first variant form the recirculation channel, are made of a whole length of the tube. Spiral 2 after winding bored to diameter D so that its inner surface forms a helical groove 4. The ends 6 are connected with a threaded nipple and a cap nut, between which are placed the adjusting elements. In the second variant, the recirculation channel is made of a separate tube segment connected to the ends 6 of the helix 2 through similar threaded connections with the possibility of adjusting the tension of the balls 17. 2 Cp. f-ly. 5 il. S (L with yu fia1

Description

113

The invention relates to mechanical engineering, namely to screw gears, and can be used in the process equipment of various OTpacjteil industrial components of the CPU of a linear replacement of products.

THE CENTURY OF THE INVENTION is an increase in the manufacturability of the gearing by simplifying the manufacture of the BINTO groove of the nut and increasing the durability by means of the cockpit: to compensate for the wear of the balls by adjusting the length of the recycle kangsha.

 FIG. shows the transmission, longitudinal section; Fig. 2 shows a recirculation channel, 1H, which is integrally formed with a cylindrical nut helix, top view; Fig 3 - nut, cross section; FIG. 4 shows the node I in FIG. 2; Fig. 5 shows a transmission variant with a removable recirculation channel.

The transmission includes a nut housing, a cylindrical helix 2, rigidly connected

connected to the housing 1, and placed inside the helix 2 screw 3. The spiral 2 is wound from a round tube. After winding, the inner diameter of the helix 2 is bored to a diameter D equal to the average diameter of the helix 2. After boring, the inner surface of the helix 2 forms a helical groove. On screw 3, the groove 5 is cut in response to the screw. The ends 6 of helix 2 are bent tangentially to its circumference parallel to each other and in the same direction.

In the first variant of the transfer, the ends 6 of the helix 2 after the bend tangentially are bent towards each other and form a recirculation channel 7 (figure 2). With one end of the helix 2, a threaded nipple 8 is rigidly connected, the aperture of which is concentric with the aperture in the end 6 of the tube forming the helix 2. A cap nut 9 is put on the other end of the tube, which ends the ends of the tubes forming the helix 2. Conical pacTo iKH lO are flared and made, concentric holes in ends 6, Elements of the recirculation duct 7 are placed between the nipple 8 and the flare nut 9, for example, In the form of sleeves 11, the holes of which are concentric, 1 nipple 8 and have a diameter equal to the diameter of the hole of the tube forming the helix 2. On the outer surface of the sleeves 11 is made

72

ten

15

20 30

35

45

55

22

co-groove 12, mating bore 10 of tube 6. The sleeves 11 are centered relative to each other, for example, using a groove 13 made in one of the sleeves 11 and an annular protrusion 14 made in the other sleeve 11 and entering in the groove 13.

According to the second variant, the threaded nipples are fixed on both horses 6 of the helix 2, and in the nipples 8 there are recesses 13.

Recirculation; 1 channel 7 is made of a separate tube 15, similar to the tube from which spiral 2 is made. At the ends of the b tube 15 are put on: -ad nuts 9, the ends 16 of the tube 15 are flared and they also have a cone1-bore 10. Between nipples 8 and cap nuts 9 are placed bushings 1 with KO1-G / SLEY grooves

I2 and annular projections 14.

The internal cavity of channel 7, as well as the cavity of screw grooves 4 and 5, are filled with balls 17, which are made of an antifriction material, for example, beryllium bronze, through one, which eliminates jamming -uiapHKOB in channel 7 "

The transmission works as follows,

When the screw 3 is rotated, the balls 17 roll over), the groove groove 5 and the helix 2 with the body 1 are in translational motion. Since the ends 6 move away from the helix 2 along the outer wall, and the inner diameters of all parts that make up the cavity for the circulation of the balls 17 are equal, they are concentric in all conjugates and do not have protrusions and fins; going smoothly.

As the balls wear 17, as well as when assembling the transmission, the ends of the sleeves

II are polished so that the balls 7 are located in the cavities of the channel 7 and the helical grooves 4 and 5 without a gap. The adjustment of the tension is carried out using the nuts 9.

Claims (2)

Invention Formula I. Sharikovo. a screw gear, comprising a housing, a rigidly connected to HifiM cylindrical helix with an inner surface in the form of a helical groove, placed inside the helix a lead screw with a matching helical screw a spiral, a recirculation channel connected to the spiral, elements of the connection of the latter with a spiral and balls placed in the helical grooves and in the recirculation channel, which, in order to improve the processability, the cylindrical spiral and the recirculation The channel is formed by a tube cut to half the diameter in a part of the helical groove. 2. A screw transmission according to claim 1, characterized in that, in order to increase durability, the connection elements are made in the form of a threaded nipple with a hole rigidly connected to one end of the tube, with a concentric hole of the channel located on the other end of the tube nut and interacting with a nipple, and two consecutive sleeves with holes, the diameters of which are equal to the diameter of the hole of the tube, and with tapered grooves at opposite ends placed concentrically nip pelyu between it and the cap nut And ends tubes are flared and conical bores are made in them adjacent to the conical grooves of the sleeves, H; The propeller drive according to Clause I., T is characterized in that, in order to increase durability, the connection elements are placed at the junction of the recirculation channel with the helix and made in the form of threaded nipples rigidly connected to the ends of the helix with a hole concentric to the orifice of the tube. placed at the ends of the recirculation channel cap nuts, designed to interact with the nipples, and concentrically placed between the corresponding nipple and cap nut bushings with holes whose diameters are equal to the diameter of the holes TIFA tube with an annular flange at the end facing the nipple, at the incoming port of the latter, and with a groove at the end facing the fastening nut and the ends of the recycle channel razvaltsovan and they are made conical bore adjoining the conical bore bushings. Fig2 fig.E / 4 12 / 6 Redal Tor I.Rybchekko Order 2405/32 Compile & 1 :: V, Savitsky Tekhred L. Oliynyk Corrector Circulation 81 Subscription VNIIPI USSR State Committee on affairs of inventions and discoveries 113035, Moscow, ZH-ZZ ,; Ra: lpska nab ,, d, 4/5 Production and printing company: e, Uzhgorod, ul. Project, 4 Proofreader M.Sharoshi