RU1781473C - Threaded part joint with one-sided access - Google Patents

Abstract

Usage: in mechanical engineering, when connecting parts with one-way access. SUMMARY OF THE INVENTION: An expandable member is placed in a through axial bore of the rod. The rod at one end has an elastic head with slots, and at the other end there is a thread with a nut. In the zone of the head, the hole is made with a conical step in which the tip of the expanding element is located. The tip is made in the form of crosswise protrusions, the end walls of which are made in the form of sections of a conical surface. The width of the protrusions is less than the width of the slots. An additional nut is placed on the thread of the expanding element behind the end of the rod. The rod is placed in the holes of the parts to be joined. 3 ill.

Description

The invention relates to mechanical engineering and can be used for fastening products, for example, box sections with closed cavities, which are difficult to access.

A device for joining parts is known. It comprises a hollow body with a thickened shank having longitudinal slots, inside of which the shaft is integral with the expansion element, a nut and a washer for securing the body in the openings of the parts to be joined. The rod is connected to the housing by a thread.

A disadvantage of this device is the complicated assembly and disassembly technology.

The purpose of the invention is to simplify installation and dismantling works and expand operational capabilities.

The goal is achieved in that the threaded connection is provided with an additional nut located on the thread of the expandable element, the hole of the rod is made with a conical step in the head area, the tip is made with protrusions located crosswise with the end walls in the form of sections of the conical surface corresponding to the conical step of the rod hole, the protrusions are made with a thickness smaller than the width of the slots of the rod.

Figure 1 shows a threaded connection, a section; figure 2 is a view of figure 1; in Fig.3 - view B in Fig.1.

The threaded connection comprises a rod 1 installed in the openings of the connected parts (Figs. 1, 3). At one end there is an elastic head 2 (FIG. 2) with four cross-shaped X |

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with their longitudinal slots 3, the outer annular groove 4, the straight 5 and the reverse cones b, facing the large bases, and the annular protrusion 7 between them, with a diameter greater than the diameter of the holes in the inner 8 and outer 9 connected parts. The shaft 1 has a through axial bore 10 passing into the inner cone 11 in the area of the head 2 with a smaller cone base on the thread side. Inside the hole 10, a expanding element 12 is freely placed with a thread on one end and a mating conical tip 13 with four cross-shaped protrusions 14 at the other end located on the side of the head 2 of the rod 1, and the thickness of the protrusion 14 is less than the width of the slot 3 of the head 2. On the thread of the expandable element 12 is placed an additional nut 15, and on the thread of the rod 1 is placed a nut 16.

The use of the device is as follows. By rotating the additional nut 15, the contact is loosened and the cross-shaped tip 13 of the expansion member 12 is brought out of contact with the head 2 and the expansion member 12 is moved relative to the rod 1 to its original position. Then, the nut 16 is installed in a certain position corresponding to the total thickness of the connected parts 8, 9, and the device is placed in the holes. The elastic head 2 is compressed in contact with the edge of the hole and, after exiting, is expanded under the action of elastic forces. After that, the expanding element 12 is moved to the working position and rotated approximately 45 degrees in any direction. The protrusions 14 of the tip 13 come into contact with the inner cone 11 of the head 2. The nut 16 is tightened, and the inverse cone 6 of the head 2 abuts against the edge of the hole of the inner connected part 8, the force is transmitted to the tip 13 of the expanding element 12 and then to the additional a nut 15, which is pressed against the end face of the rod 1. If necessary, the position of the tip 13 is regulated by rotating the additional nut 15. treadmill cone 11

head 2, rotation of the expanding element

12 to match protrusions 14 tips

13 with slots 3 of the head 2, axial movement of the expanding element 12 until it stops

the protrusions 14 into the rod 1 at the end of the slots 3 and the output of the device from the hole by compressing the head 2 in contact with the inverse cone 6 with the edge of the hole in the inner part 8. Exposure to all of these

The operations are mainly carried out on the additional nut 15. If necessary, tighten the nut 16.

The use of this device of one standard size will allow fast fastening and

to separate parts with different overall thicknesses, one-sided access. In addition, there is no need for slots or chamfers on the internally joined part.

Claims (1)

SUMMARY OF THE INVENTION Threaded connection of parts with one-way access, containing installed in the holes of the connected parts a rod with an elastic head with longitudinal slots on one end, a thread and a nut on the other, and an expandable element located in its through axial hole with a tip on one end located on the side of the head of the rod and a thread on the other, while the head of the rod is made with two conical sections, facing the large bases of the cones, the diameter of which is larger than the diameter of the holes of the parts to be joined, characterized in that, in order to simplify installation and dismantling work and expand operational capabilities It is provided with an additional nut located on the thread of the expanding element, the hole of the rod is made with a conical step in the head area with a smaller base of the cone on the thread side, the tip is made with protrusions located crosswise with end walls in the form of sections of a conical surface corresponding to the conical step of the rod hole, the protrusions being made thicker than the width of the slots of the rod, the head of the latter made with a cylindrical section mating with the conical and with an annular groove on the outer side surface from the side of the rod . I Type A "Ft, a Editor A. Ver Tehred M. Morgenthal Order 4264 Mintage VNIIIPI of the State Committee for Inventions and Discoveries under the USSR SCST 113035, Moscow. Zh-35, Rauska embankment. 4/5 / "/ J Vut.S Ј, $ # " & g, 3 Corrector P. Gereshi