RU2398136C1 - Facility for fixation of mutual angular position of two parts - Google Patents

Abstract

FIELD: machine building. ^ SUBSTANCE: facility for fixation of mutual angular position of two parts consists of retainer with stop made on periphery of washer for interaction with stop of one of fixed parts and of central opening. Stops of the second fixed part are made in form of cutting edges of tops of polyhedron on its end interacting with facets of the retainer formed when the retainer is press-fitted to polyhedron. Diametre of the central opening if the retainer is less, than diametre of the circumscribed circle of polyhedron and bigger, than diametre of inscribed circle of polyhedron. External surface of the retainer is conjugated with surface of a seat for it, made in the first fixed part; also depth of the seat exceeds thickness of the retainer, and end of polyhedron is recessed relative to the end of the first fixed part. ^ EFFECT: mutual fixation of two parts in any relative angular position and increased accuracy of adjustment. ^ 4 dwg

Description

The present invention relates to the field of mechanical engineering and can be used in the design of devices containing two coaxially arranged parts to fix their mutual angular position.

It is known to use various locking washers as fixing elements for such devices.

So, there are known “Lock washer with a toe in accordance with GOST 13465-77” and a similar “Lock washer with a toe in accordance with GOST 13463-77”, designed to eliminate the self-loosening of hex nuts and bolts with a hex head, fixed relative to one part with a sock or foot , and fixing the second part (the head of the bolt or nut) with the help of two petals, bending after joining the parts and covering two adjacent faces of the head.

The disadvantage of this design is the limited number (of 6 according to the number of faces) of the possible fixed relative positions of the two parts, and after connecting the parts, the rib of the head of the bolt or nut should be strictly against the cut between the washers of the washer, i.e. such washers are not intended for fixing parts in intermediate positions between adjacent edges of the head and for reliable fixing of parts, the threaded element will either have to be pulled in or pulled out, which is not always permissible.

To a large extent, this drawback has been eliminated in the design of the “Lock washer for fixing the mutual angular position of the two parts”, selected by the prototype of the present invention, containing at least one emphasis, for example, splines or faces, made in its central hole for interaction with the stops of one of the fixed parts, and at least one stop made on the periphery of the washer to interact with the stops of the second of the fixed parts, in which the stop on the periphery of the washer is offset from the stop its central hole by an angle whose magnitude is inversely proportional to the product of the number of stops on the first and second latched detail [the USSR Inventor's Certificate №552438 M Cl ² F16B 39/10, the 08/12/1974 by].

The design of the prototype provided an increase in the number of fixed positions of one part relative to another and, therefore, increased the accuracy of adjustment.

The disadvantage of the described device, however, is the limited number of possible relative fixed angular positions of the two parts, as well as the difficulty of selecting combinations, especially for small parts, for which the implementation of a large number of stops is technically impossible.

The task of the invention is to ensure the mutual fixation of two parts in any relative angular position and increase the accuracy of adjustment.

The solution to this problem lies in the fact that in the device for fixing the mutual angular position of two parts containing a lock washer having a stop made on the periphery of the washer to interact with the stop of one of the parts to be fixed, and the central hole, the stops of the second fixed part are made in the form of cutting the edges of the vertices of the polyhedron at its end, interacting with the faces of the lock washer formed in it when it is pressed onto the polyhedron, while the diameter of the central hole of the lock washer is made the diameter of the described circumference of the axial polyhedron and the diameter of the inscribed circle, and the outer surface of the lock washer is mated to the surface of the nest under it made in the first fixed part, the depth of the nest exceeding the thickness of the lock washer and the end face of the polyhedron is recessed relative to the end face of the first fixed part.

The execution of the stops of the second fixed part in the form of cutting edges of the vertices of the polyhedron at its end, interacting with the faces of the lock washer formed in it when it is pressed onto the polyhedron, provides mutual angular fixation of the parts in any their relative position after adjustment due to the formation of a washer in the central hole its installation of the vertices of the polyhedron of angular faces cut down by cutting edges, which are reciprocal stops.

Making the diameter of the central hole of the lock washer smaller than the diameter of the described circumference of the axial polyhedron and larger than the diameter of the inscribed circle ensures a reduction in the pressure of pressing the washer by reducing the surface area cut in the washer when it is mounted on the polyhedron to the size of the vertex angles of the polyhedron.

The execution of the outer surface of the lock washer, mating with the surface of the socket under it, made in the first fixed part, ensures alignment of the Central hole of the washer and the axis of the polyhedron.

Performing a socket depth exceeding the thickness of the washer, and the end face of the polyhedron, recessed relative to the end face of the first fixed part, ensures that when the washer is installed, it is first angularly oriented relative to the first fixed part by abutting on the periphery of the washer, and then the washer is pressed onto the polyhedron of the second fixed part.

The invention is illustrated by graphic materials, which show:

- figure 1 is a General view of the device;

- figure 2 is a longitudinal section of a device;

- figure 3 - geometric parameters of the polyhedron,

- figure 4 - the relative position of the elements when installing the lock washer.

A device for fixing the mutual angular position of two parts - axis 2 relative to the housing 3 - contains a lock washer 1 (Fig. 1) having a central hole 4, and on the periphery there is a stop 5 interacting with a groove 6 of the housing 3. A polyhedron is made at the end of the axis 2 7, the peaks 8 (FIG. 3) of which are provided with cutting edges 9, the diameter of the central hole 4 of the lock washer 1 being made smaller than the diameter of the circumscribed circle 10 of the polyhedron and larger than the diameter of the inscribed circle 11. A lock washer is located in the socket 12 of the housing 3, mating with m its outer surface 13.

Installing the washer as follows.

After setting the relative angular position of the axis 2 relative to the housing 3 (for example, using a key worn on the polyhedron 7), the lock washer 1 is installed in the socket 12 of the housing 3, while it is first oriented relative to the housing 3 with the stop 5 included in the groove 6 of the housing , and only having selected the gap 14, then it is pressed onto the polyhedron 7, which cuts the corresponding angular faces in the washer with its cutting edges 9 of the peaks 8, which provide relative angular fixation of the axis 2. In this case, additional locking of the washer is not required . In Fig.2 and 3 blackened extruded during napressovki washers sections of its metal.

Thus, the proposed device provides mutual angular fixation of two parts in any relative position and, accordingly, increase the accuracy of adjustment.

Claims (1)

A device for fixing the mutual angular position of two parts, containing a lock washer having a stop made on the periphery of the washer to interact with the stop of one of the parts to be fixed, and a central hole, characterized in that the stops of the second part to be fixed are made in the form of cutting edges of the vertices of the polyhedron on it the end interacting with the faces of the lock washer formed in it when it is pressed onto the polyhedron, while the diameter of the central hole of the lock washer is made smaller than the diameter of the circumference described polyhedron and the large diameter of the inscribed circle of the polyhedron, and the outer surface of the lock washer is mated to the surface of the nest under it made in the first fixed part, the depth of the nest exceeding the thickness of the lock washer and the end face of the polyhedron is recessed relative to the end face of the first fixed part.

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