SU1439340A1 - Screw-type transmission - Google Patents

Abstract

The invention relates to mechanical engineering and can be used to transfer large power loads to the manipulators. The invention aims to simplify the design by making the lubricant supply unit in the form of an annular insert 8. The insert 8 is installed in the wall 7 of the casing 4. The nut 2 has a through hole for squeezing grease from one housing to another. When the nut 2 moves along the screw 1, the lubricant is removed by the nut 2 from the screw groove into the casing. At the same time, the grease left on the screw 1 outside the casing 4 is collected by the bevel of the insert 8. Excess snares are squeezed through the hole 5. 2 Cp. f-ly, 4 ill.

Description

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The invention relates to mechanical engineering and can be used to transfer large power loads in manipulators.

The purpose of the invention is to simplify the design by making the lubricant supply unit in the form of annular inserts. and expanding kinematic capabilities.

FIG. 1 shows a screw transmission; in fig. 2 - y: green I in figure 1; in fig. 3 shows a section A – D in FIG. 2; in fig. 4 shows a section BB in FIG. 3

The screw drive contains screw 1, a nut 2, on the ends of which the covers 3 and 4 are fastened. A through hole 5 is made in the nut for transferring lubricant from one cover to another. Each housing has a cavity 6 for accommodating lubricant. In the wall 7 of the casing there is an annular insert 8 with a screw thread 9 on its inner diameter, which forms a labyrinth magnification with the screw. The ends of W and 11 screw thread have bevels 12 and 13, facing the casing. The insert 8 consists of separate parts 14 and 15, in each of which there is a rod 16 pressed in the radial direction by the spring 17.

Screw transmission works as follows.

When the nut 2 moves along the screw 1, for example, to the right, the lubricant is pushed out of the screw groove into the housing 4 by the nut 2. the cover 3 assembles the lubricant using the bevel 12 of the inner end of the cut 9.

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If an excess of lubricant is formed in the casing 4, then when the nut is moved, this excess lubricant is squeezed through the hole in the casing 3. When the nut is moved to the left, the process goes in the opposite direction. In order to provide better sealing of the cavity 6 of each casing, the insert is made of a circumferentially compound of at least two parts 14 and 15s which are pressed against each other by means of rods 16 and springs 17, which provides a sample of inter-turn gap.

Claims (3)

1. A screw drive containing a screw, a nut interacting with it, two housings secured at the ends of the nut and enclosing the screw, and a lubricant supply unit into the gap between the screw and the nut differing By the fact that, in order to simplify the design and expand the kinematic possibilities, the lubricant supply unit is made up of annular inserts with screw thread placed in each casing, forming a labyrinth seal with the screw. 2. Transmission according to claim 1, so that the screw cutting of each annular insert at its initial and final portions, connected to the casing, has bevels for collecting the residue, s | oil from the surface of the screw in the casing. 3. Transmission according to claim 1, characterized in that each insert is made split in the radial direction and is spring-loaded to the screw. 9g op N. Yatsola 6057/36 Compiled by G. Savochkin Tehred L. Oliynyk Circulation 784 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Co Po i5 U / 7 6-5 13 Hafjpofffl & HUff glass blower 9ut.ff Proofreader M. Sharoshi Subscription