SU1428567A1 - Screw mechanism - Google Patents

Abstract

The invention relates to screw mechanisms and can be used as a force mechanism of a clamping device. The purpose of the invention is to provide ease of assembly and disassembly of the screw mechanism of the clamping device. The screw mechanism includes a housing 1 in which a through hole 2 is made, an emphasis 3 mounted on the housing 1 and having a threaded hole 4, coaxially with the opening 2 of the housing 1, a slider 5 and a screw 6, the screw 6 is installed in the housing 1 through the opening 4. In the hole 2 of the housing 1, a slider 5 is mounted. Through the handwheel 1 1, the elements of the clamping device are screwed together. Since the thread on the screw 6 has a differential thread pitch that interacts with the thread of the stop 3, less than the thread pitch that interacts with the thread of the slide 5, when it is rotated one turn clockwise, the slide 5 will move in the direction of the stop 3 by an amount equal to the difference of the steps threading, clamping part 12. 1 3. item f-ly, 6 il, (L 4 ts :) oo JV Oi

Description

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The invention relates to mechanical engineering more specifically to screw mechanisms, and can be used as a force mechanism of a clamping device.

The purpose of the invention is to provide ease of assembly and disassembly of the screw mechanism when used in clamping devices,

FIG. 1 shows a screw mechanism, a general view; in fig. 2 - the same, ic movable stop; in fig. 3 - 6 - different variants of the screw mechanism;

I The screw mechanism contains a core - Ipus 1, in which a through hole 2 is made, an emphasis 3, mounted I on the body 1 and having a threaded I hole 4, coaxially with the aperture 2 of the body 1, a slider 5 and a screw 6. Slider

5 is installed in hole 2 and has a threaded hole 7, coaxially with hole 4 of stop 3. Screw 6 has two threaded sections 8 and 9 with unidirectional threads of different diameters. On the threaded section 8 with a large diameter RUM, a thread with a small pitch was made, and on a threaded section 9 with a smaller diameter - a thread with a large pitch. The larger diameter threaded section 8 is located in the threaded hole 4 of the stop 3, and the smaller diameter threaded section 9 is located in the cutting hole 7 of the slide 5. The stop 3 can be installed in the hole 2 of the housing 1 so that it can move along this hole 2. At the end 10 screws

6 set handwheel 11.

The mechanism works as follows.

A screw 6 is installed in the housing through an opening 4, made in the support 3. A slider 5 is inserted into the opening 2 of the housing 1. A screw 6 is rotated by the wiper 11, thereby screwing the elements of the clamping device. Since the thread on the screw 6 is made differential, i.e. one direction, but with different pitch, and the pitch of the thread interacting with the thread of the stop 3 is less than the pitch of the thread interacting with the thread of the slider 5, then when it is rotated one turn clockwise the slider 5 moves-

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c in the direction of the stop 3 by an amount equal to the difference in the pitch of the threads. When exposed to the slider 5 on the part 12 installed in the housing 1, it is clamped. The power coefficient of transmission in the screw mechanism with a differential thread is greater than 6 for a conventional screw and depends on the difference in the pitch of the threads that it is possible to choose so that with sufficiently fast movement of the slide 5 a significant clamping force is established with a small force on the handwheel 11.

When the screw 6 is rotated counterclockwise, the slide 5 from the part 12 is forcibly withdrawn and, accordingly, the latter is guaranteed to be released, which ensures high performance of the device.

The screw mechanisms (Figures 2-6) work in a similar way and differ only in the mutual arrangement of the individual elements.

Claims (2)

Invention Formula 1, a screw mechanism comprising a housing with a through hole, an emphasis mounted on the housing and having a threaded hole, coaxially with the housing hole, mounted in the body hole of a slide with a threaded hole, coaxially with the stop hole, a screw with two threaded sections with a unidirectional thread of different diameter, on the threaded section of a larger diameter is threaded with a shorter pitch than on a threaded section with a smaller diameter, about tl and - h. and y, so that in order to ensure ease of disassembly and assembly when used in imnyh devices ,, threaded portion of the screw with a larger diameter threaded hole located in abutment and the screw threaded portion with a smaller diameter - in the threaded hole of the slider. 2. The mechanism of claim 1, in that the stop is mounted in the opening of the housing so that it can be moved along this opening. (Pice.s 9g 9i, g. 5 PiLZ.6