SU868155A1 - Apparatus for locking threaded connection - Google Patents

Description

(54) DEVICE FOR STOPPING THE THREADED CONNECTION

I

The invention relates to mechanical engineering and can be used in various threaded connections located in hard-to-reach places, for example, in recesses in which the assembly and disassembly of the nut and especially the washer is difficult.

A device for locking a threaded joint is known in which the nut is made with a serrated knurling on the outer surface on a part of its height on the side of the supporting surface and the washer has spring legs, on the inner side of which there are rectangular projections with bevels in the end part. The locking is carried out by engaging the rectangular projections of the legs with the knurling teeth on the nut. In this case, the washer is fixed to the threaded part by means of a shaped thread. When dismounting the joint, it is necessary to first unfasten the tabs of the washer, then remove

her then you can unscrew the nut tlj

The disadvantages of this device include the complexity of the nut design and installation, since during installation the washer must be installed separately after tightening the nut, and when dismantling it is necessary to first remove the washer, which is in places with limited access to the threaded connection, for example

The 10 deep well type structures present a certain difficulty, which limits its field of use.

It is also known a device for stowing a threaded joint comprising a threaded rod, a nut with external edges and a spring washer with a sprung foot and a hard lobe G21.

Claims (2)

Such an embodiment of the device makes it possible to assemble and disassemble the nut in places with limited access with an allen key, which automatically depresses the tabs of the washer. However, the installation of the washer on the threaded rod and especially its removal from the recess is difficult. The purpose of the invention is to simplify the assembly and dismounting of the joint in hard-to-reach places. This goal is achieved by the fact that in the device for locking the threaded joint, containing a washer with spring legs and a rigid lobe, mounted on a threaded rod between the part to be joined and the threaded element having outer side edges of a key, the hard lobe of the washer is located in a recess made in the threaded rod or not in the connected part, and each spring of the presser foot has a V-shaped longitudinal section and is located with the possibility of contacting the middle part with the outer side face of the threaded element ta. When removing the nut with an allen key that plays into the outer annular groove, the spring tabs of the washer are automatically pressed from the edges of the nut and the latter can be freely unscrewed from, and the bends of the tab enter the annular groove of the key, and the washer is removed together with the nut. FIG. 1 shows a device with a partial section} in FIG. 2, the same, top view. The device contains a nut 1, a threaded rod 2 and a washer 3. The threaded rod 2 is made with a recess 4, and the washer 3 has locking elements in the form of a rigid petal 5 and spring tabs 6. The nut 1 is screwed onto the threaded rod 2 and presses the washer 3 to the surface of the part 7. Petal 5 of the washer 3 is located in the recess 4 of the threaded rod 2 or in the recess 8 of the part 7, and the spring feet 6 of the washer 3 have a V-shaped longitudinal section with two bends 9 and 10, of which the bend 9 is located in the plane of the washer 3 at a distance from the nut, and bending 10 - tightly pressed against spring forces to the face 11 of the nut 1 and interacts during assembly and disassembly with an allen key 12 with an external annular groove 13, due to which the washer 3 with the help of spring legs 6 can be held on that key. In this case, the spring tabs 6 will be somewhat diluted in comparison with the position that they occupy when the nut 1 is locked. The joint is assembled in the following order. Beforehand, the nut I is installed in the socket wrench 12, and the washer 3 is put on the wrench 12 until the spring tabs 6 are caught by an annular groove 13. The washer 3 is held on the wrench due to the elastic forces of the spring tabs 6. When the wrench rotates, the lobe 5 of the washer 3 s is aligned recess 4 of the threaded rod 2, after which the nut 1 is screwed onto the threaded rod 2. After tightening the nut I, the spring legs 6, under the action of elastic forces, are pressed tightly against the outer side face of the nut 1 and stop it against the threaded rod 2. The lagged connection can be either a nut or a bolt head as one of the threaded elements. When locking the Bolt Head, the petal 5 of the washer 3 is located in the recess 8 of the part 7 into which the bolt is screwed. The order of assembly and disassembly for this option does not differ from the above. Simplification of installation and disassembly is achieved by the fact that the spring legs have a V-shape in longitudinal section and interact with their bend 10 with the installation tool. This allows simultaneous insertion or removal of the installation tool from the work area to automatically lock or lock the threaded connection. In addition, the proposed device allows improving the quality of the assembly by eliminating the loss of a nut or bolt and washer inside the assembled structure, especially when assembling complex mechanisms where finding or removing lost parts is difficult. Formula of the invention Locking a threaded joint containing a spring washer Ashmi legs and a hard petal mounted on a threaded rod between the part to be joined and a threaded element having external lateral-turnkey keys, characterized in that. That, in order to simplify its installation and disassembly in hard-to-reach places, the hard washer of the washer is also located in a recess made in a threaded hinge or in a connected part, and each spring foot has a V-shaped shape in a prog of longitudinal section and is positioned in contact the middle part with the outer side face of the threaded element. 68155 Sources of information- taken into account during the examination 1. USSR author's certificate No. 549608, cl. F 16 B 39/24, 1924. 5 2. Patent Sheytsarii 1 406740, class, 47a, P., 1967 (prototype).