SU1216499A1 - Rack mechanism - Google Patents

Description

The invention relates to mechanical engineering and may find application in mechanisms having gear-rack gear.

The aim of the invention is to increase the service life of the transmission.

FIG. 1 shows a rack and pinion transmission, with the installation of a key on the rail, and an annular groove on the gear, a general view of FIG. 2 shows an embodiment of a rack and pinion with the arrangement of a key on a gear, and an annular groove in a rail; Fig. 3 is an embodiment of a rack and pinion with two laths, repeating the arrangement of keyed joint elements in Figs. 2; in fig. 4 is the same with the arrangement of the elements of the keyed joint, FIG. i.

In case 1 (Figs. 1 and 4), the bearings are mounted on supports 2, for example, on angular contact bearings, shaft 3 with gear 5 mounted on key 4 with gear 5 with an annular keyway 6 with which the prismatic key 7 interacts, Eliminate ush: turning the slats around its axis and preventing the teeth of the rack and pinion from jamming during operation. The prismatic key 7 is made on the rail 8 and is rigidly connected to it with screws 9. The rail 8 is installed in the housing 1. The axial fixation of the shaft in the housing 1 is carried out through the supports 2, the bolts 10 and II and the split nuts 12 and 13 with the counter screws 1 sh 14 and 15. Krshka 10 and I are fixed in housing I from turning by pins (.not shown) in contact with longitudinal grooves made in krshkah 10 and 1. Fixing gear 5 on shaft 3 is carried out with a nut 16 through sleeve 17, left support 2 and sleeve 8 "

In the rack and pinion embodiment of FIG. 2 and 3) the key 7 is made in the form of a circular disk and is located between the parts of gear 5, consisting of two jointly made parts and a common key 4 rigidly connected with the circular disk key 7 4. The keyway 6 of the key 7 is executed on the rail 8.

The gear assembly is carried out in the following sequence.

In the housing 1 is mounted on supports 2, the shaft 3 with the mounted on it

164992

gear 5. On the shaft 3, together with the stubble 5, a disk key 7 can be mounted (Fig. 2 and 3). Then a rail 8 is mounted in the housing 1,

5, the teeth of which are engaged with the gears of gear 5, and the key 7, which is installed in the ring groove of the gear (Fig. 2 and H), or in the ring groove of the rail (Fig. 1 and 4), interferes with the key groove 6, made on the corresponding specific variant gearing element. After this, the holes in the housing 1 are inserted

J5 10 and 11 and nuts 12 and 13 were precharged.

By screwing the nut 16 through the sleeve 17, the left support 2 and the sleeve 18, the axial fixation is carried out

(fastening on the shaft) gear 5,

as well as the disk key 7 (Fig. 2 and 3).

Then, for example, by wrapping the nut 2, a selection of axial

the gaps between the parts (nut 12, bolt 10, shaft 3, gear 5, key 7, groove 6J, after which the nut 12 is locked with a screw 14. Similarly, axial gaps are selected in the right support 2, after which the nut 13 is locked with a screw 15.

Rack transmission works as follows.

The rotation, HanpHi iep, from the shaft 3 is transmitted to the pinned on it.

gear 5 with an annular groove 6 (FIG. 1 and 4) or a key 7 (FIG. 2 and 3) formed on it. The gear tooth interacts with the rack and moves the latter. The rail moves together with either a key 7 (Fig. 1 and 4) or a key groove 6 (Fig. 2 to 3) fixed to it, respectively.

The direction of movement of the key and keyway in the place of their interaction coincides both in magnitude and in direction, so slippage between them is minimized.

Torque arising at. the performance of the rack and pinion and applied to the rail, is transmitted through the key 7 and the shaft 3 to the supports 2, which perceive both axial and radial loads and prevent rotation of the rail.

1216499 S 2 18

FIG. 2

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Claims (2)

1., RACK GEAR, content -. a housing housing, a rack with a groove placed in it, a key, a part of which is located in the latter, and a gear, a nude that engages with the rail, o t - characterized in that, in order to increase the service life of the transmission, an annular groove is made on the gear part of the gear, and the key is fixed in the groove of one of the elements interlocking with each other and interacts with the groove of the other ele-; the cop. 2. The transmission according to claim 1, characterized in that it is annular _{: the} groove is formed by the ends of the two parts of the gear installed with a gap, and the key is made in the form of a circular disk placed in the annular groove, fastened to the parts of the gear and interacting with the groove of the girder> ί