SU881397A1 - Self-locking threaded connection - Google Patents

Description

(54) SELF-CONTROLLED THREADED CONNECTION

one

The invention relates to machine construction and can be used for locking threaded connections.

A self-locking threaded connection is known which contains a threaded rod mounted in a housing with a shoulder and an annular groove at the base of the collar, while a conical annular protrusion is made on the housing from its end face. When assembling the joint, the collar of the threaded rod interacts with the conical annular protrusion of the housing, which is plastically deformed and fills the annular groove of the rod, ensuring self-locking l j.

A disadvantage of the known joint is that it is impossible to ensure the assembly of the joint when making a body of high strength or brittle material, since the annular protrusion must be sufficiently plastic.

Closest to the proposed technical essence is a self-threaded threaded joint containing a threaded rod with a collar and an annular groove at the base of the collar, as well as a locking element with a conical annular protrusion installed in the housing. In this device, the locking element is made in the form of a sleeve with an external threaded surface installed in the threaded hole of the housing, while the conical annular protrusion is made on the projecting end of sleeve G2 1.

However, this compound has

Claims (2)

15, because in order to securely fasten the sleeve with a tapered protrusion in the housing, at least 3-5 turns of the thread are necessary. In addition, this structure is not sufficiently technological, since it is difficult to cut a short thread of large diameter in the case of high-strength or brittle material. 38 The aim of the invention is to reduce the dimensions of the joint in the manufacture of a body of non-ductile material and to simplify the design. This goal is achieved by; - that the self-alignment of the threaded connection contains a threaded rod installed in the housing with a shoulder and an annular groove at the base of the shoulder, and also a locking element fixed to the housing with In addition, the surface of the annular groove of the threaded rod is corrugated .. Fig. 1 shows a threaded rod; Fig. 2 shows a lock washer fixed relative to the housing in Fig. 3 - self-locking The threaded connection is complete. fixed to the housing with a barb. 8. At the same time, the surface of the annular groove of the threaded rod is made with grooves 9. When the threaded rod is screwed in, the circular conical protrusion of the washer interacts with It is plastically deformed and fills the annular groove, in this case self-locking occurs due to the force of rhenium between the contacting surfaces and due to rolling. Making the annular groove grooved provides increased reliability of the connection due to additional friction between the core and the washer. Making the locking element interchangeable in the form of a washer makes it possible to simplify the construction and reduce the dimensions of the proposed threaded connection. Claim 1. A self-locking threaded joint comprising a threaded rod mounted in a housing with a shoulder and an annular groove at the bottom of the drill, as well as a locking element fixed to the housing with a conical annular protrusion, characterized in that making the body of a non-ductile material and simplifying the design, the locking element is designed as a washer placed between the collar of the rod and the body. 2. The connection according to claim 1, about tl and which is such that, in order to increase the reliability of the connection, the surface of the annular groove of the threaded rod is made corrugated. Sources of information taken into account during the examination 1. USSR author's certificate number 429188, cl. F 16 B 39/28, 1972. 2. USSR author's certificate number 617627, cl. F 16 B 39/28, 1976.