SU1506186A1 - Blind threaded connection - Google Patents

Abstract

The invention relates to mechanical engineering, in particular, to connections of elements of universal assemblies. The purpose of the invention is to simplify the design and increase the durability of the compounds. A threaded joint contains connectable parts with through holes. In one of them, the hole is made conical, extending to the inaccessible side. A pin with a tapered shank and a cylindrical neck at one end and a threaded part and a nut at the other is installed in the holes. A skirt of petals placed on a spring ring is mounted on a conical shank rod. The rod, along with the skirt, is inserted into the tapered bore from the accessible side. Holding the skirt in the hole, the rod is moved to the upper position, wedging the petals of the skirt. The threaded connection is tightened with a nut. Disassembly of the connection is carried out in reverse order. 4 il.

Description

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The invention relates to mechanical engineering, in particular to joints of elements of universal assemblies,

The purpose of the invention is to simplify the design and increase the durability of the joint.

FIG. 1 shows a threaded connection when installing the rod in the parts to be connected without securing the cross section; in fig. 2 - the same, with the closure of the connected parts; in fig. 3 - neck with unfolded skirt, section; in fig. 4 - a neck with the skirt which is put on it.

A single-threaded threaded connection contains connecting parts 1 and 2 with through holes, and in part 1 having one-sided access, the hole is made conical, extending to the inaccessible side. In coaxial lead, a rod 3 is installed with a threaded part 4 and a nut 5 at one end and a tapered shank 6 and a cylindrical neck 7 at the other. The angle of the shank cone corresponds to the angle of the tapered hole in part 1. Chamfers 8 and 9 are made in the holes at the junction of the surfaces of the parts to be joined. On the cylindrical neck 7 of the rod 3 there is a skirt 10, consisting of petals 11 with bent ends placed on spring ring 12 with the ability to interact in detail, and bent ends - with chamfers 8 and 9 for details.

The thickness of the petals 11 of the skirt 10 is determined by the formula

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ti o

Where

d. outer diameter of the thread; dJH is the inner diameter of the thread.

The coupling process is carried out as follows.

The petals 11 are mounted on the spring ring 12 (Fig. 3), thus forming the skirt 10. Then, the skirt 10 is mounted on the cylindrical neck 7 of the rod 3 and then the rod with the skirt is inserted into the hole of the part 1. Holding the skirt with your hand or the detail 2, rod move up

until the petals 11 are jammed between the walls of the conical hole of the part 1 and the conical surface of the stem of the rod (Fig. 2). The installed part 2 is clamped with a nut 5.

Dp disassembling the connection unscrew the nut 5 and move the rod 3 down to install the skirt 10 to its original position (Fig. 1). The spring ring 12 holds the petals of the skirt in this position and after removing the part 2 the rod together with the skirt is removed from the hole of the part 1.

The threaded connection reduces the time spent on connecting parts when reassembling and disassembling fixtures from the universal modular retrofit toolbox, reduces the laboriousness of their manufacture and increases the durability of use.

Claims (1)

25 claims A threaded connection with one-sided access, containing connectable parts with through holes, a rod with threads and a nut at one end mounted on coaxial holes, and a tapered shank on the other, on which a sleeve is arranged with the possibility of interaction with the latter, forming a skirt, except for the fact that, in order to simplify the construction and assure durability of the joint, in the part having one-sided access, the opening is made conical, expanding to inaccessible a side with an angle corresponding to the angle of the cone on the stem shank, chamfers are made in the holes at the junction of the surfaces of the parts to be connected, the bushing is fitted with a spring ring mounted on the cylindrical part of the rod, and the skirt elements are made of separate petals with bent ends and mounted on a spring ring with the possibility of interaction of petals with a conical surface of the hole in the part, and bent ends - with chamfers on the details. 7 ///////////////// /////// 2 /; "Puz-J Fd / hf