RU2408800C1 - Locking connection and procedure for its implementation - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: locking connection consists of case with orifice and circular groove. The orifice has radial slots from the side of the case end. The slots are uniformly located relative to the orifice and enter into the circular groove. Also, the locking connection has a locking ring with uniformly arranged lugs. The locking ring is inserted in the circular groove of the case. Diametre of lugs bases correspond to diametre of the orifice of the case; while width and amount of lugs correspond to width and number of slots of the case. The locking ring has crown teeth distant from external diametre of lugs at a value exceeding depth of the circular groove; the teeth are bent inside slots of the case and are shifted in the circumferential direction relative to the lugs of the locking ring; their shift does not exceed half of angle between neighbour lugs. Width and number of the crown teeth correspond to width and number of case slots. Procedure for implementation of the said locking connection consists in making the circular groove in the case with the slots entering the groove; the locking ring is inserted into the case till it gets into the circular groove. The lugs of the locking ring are inserted through the slots of the case; also after the locking ring gets into the circular groove, it is turned in circumferential direction inside the circular groove till the crown teeth match with the slots of the case; further, the crown teeth are bent into the said slots of the case.

EFFECT: increased reliability of locking connection.

2 cl, 3 dwg

Description

The invention relates to mechanical engineering, namely to devices for axial fixing of parts in the openings of the housings.

From the literature [1] p. 487, a locking connection is known, including a housing with an annular groove, as well as a locking ring with evenly spaced protrusions, located in the groove of the housing.

A known method of making a locking connection, described in [1] p. 487, including the insertion of the locking ring into the housing until it enters the groove.

The disadvantage of this device and method is the difficulty of dismantling the retaining ring.

This drawback is partially eliminated in the locking connection described in [1] p. 481, a prototype comprising a housing with a hole and an annular groove, provided with radial grooves on the side of the housing end, evenly spaced relative to the opening and extending into the annular groove, as well as the locking ring with evenly spaced protrusions located in the annular groove of the housing.

This drawback is partially eliminated in the method of making a locking connection described in [1] p. 480-481, a prototype comprising forming an annular groove in the housing with grooves extending into it, as well as inserting the retaining ring into the housing until it enters the groove.

The disadvantage of these devices and method is the low resistance of the retaining ring to impact axial loads and vibration, because to remove the retaining ring, the groove must be shallow and the retaining ring must be flexible.

The technical result of the invention is to increase the reliability of the locking connection by ensuring the resistance of the locking ring to vibration and impact axial loads.

The technical result is achieved by the fact that in the locking connection, comprising a housing with a hole and an annular groove, provided with radial grooves from the side of the housing end, evenly spaced relative to the hole and extending into the annular groove, as well as a retaining ring with evenly spaced protrusions located in the annular groove of the housing , unlike the prototype, the diameter of the base of the protrusions in it corresponds to the diameter of the opening of the housing, the width and number of protrusions correspond to the width and number of grooves of the housing a, the retaining ring on the end side is equipped with castellated teeth spaced from the outer diameter of the protrusions by an amount exceeding the depth of the annular groove, bent into the grooves of the housing and made with a shift in the circumferential direction relative to the protrusions of the retaining ring, not exceeding half the angle between adjacent protrusions, the width and number of crown teeth correspond to the width and number of grooves in the housing.

The technical result is achieved by the fact that in the proposed method of making a locking connection, described above, which includes forming an annular groove in the housing with grooves extending into it, as well as inserting the retaining ring into the housing until it enters the groove, in contrast to the prototype, introducing the protrusions of the retaining ring carried out through the grooves of the housing, and after getting the snap ring into the groove, it is rotated in a circumferential direction inside the groove until the crown teeth are aligned with the grooves of the housing, and for it is folded crown teeth into these grooves housing.

The implementation of the distinctive features of the device and method allows you to dismantle the retaining ring of any thickness from the annular grooves of sufficient depth, and also protects the retaining ring from spontaneous displacement from the groove when subjected to axial loads and vibration.

The implementation of these devices and methods is illustrated using graphic materials. Figure 1 shows the locking connection in the context, figure 2 shows a scale General view of the locking ring before installation in the housing, figure 3 shows a section of the locking ring along BB.

The retaining connection includes a housing 1 with an opening 2, an annular groove 3 and radial grooves 4 extending into it, as well as a retaining ring 5 with protrusions 6 and castellated teeth 7. A retaining ring 5 is installed in the annular groove 3, and the crown teeth 7 are bent into the grooves 4 The circlip 5 fixes the shaft 8 from axial movement in the housing 1. The grooves 4 are made from the side of the end of the housing 1 and are evenly distributed relative to the hole 2.

The method of making the locking connection is as follows: on the cylindrical surface of the hole 2 of the housing 1, an annular groove 3 is formed and radial grooves 4 evenly distributed relative to the hole 2 from the side of the housing end 1 extending into the groove 3. The protrusions 6 of the locking ring 5 are led into the grooves 4 of the housing 1 before falling into the groove 3, then rotate the ring 5 inside the groove 3 in the circumferential direction to align the castellated teeth 7 with the grooves 4 of the housing 1, after which the castellated teeth 7 are bent into these grooves 4.

The diameter Db of the protrusions 6 is made larger than the diameter Do of the opening 2 of the housing, but smaller than the diameter Dk of the groove 3, while Dk-Db = Δ, and the diameter (Do-Δ) of the base of the protrusions 6 is made corresponding to the diameter of the hole 2 of the housing 1, therefore ring 5 into the groove 3 is possible only through the grooves 4. In order for the retaining ring 5 to be able to rotate in the circumferential direction, the castellated teeth 7 at the end of the retaining ring 5 must be separated from the outer diameter of the protrusions 6 of the retaining ring 5 by an amount exceeding the depth of the groove, t .e. L = Dв-Dз must be greater than Dк-Do by at least a gap Δ between groove 3 and retaining ring 5. For the free insertion of retaining ring 5 into groove 3, the width and number of protrusions 6 correspond to the width and number of grooves 4. To ensure engagement of the protrusions 6 with the edge of the groove 3 rotate the retaining ring in the circumferential direction by an angle α equal to half the angle between adjacent grooves 4, corresponding to the angle between adjacent projections 6, while the crown teeth 7 are opposite the grooves 4, because offset relative to the protrusions 6 by the same angle α.

The implementation of the distinguishing features of the device and method provides the insertion of the retaining ring into the annular groove of the housing, the protrusions of the retaining ring engaging with the edge of the groove and fixing the locked position by means of castellated teeth bent into the grooves of the housing. All this ensures the resistance of the ring to vibration and impact axial loads, which increases the reliability of the locking connection.

Literature

1. P.I. Orlov. Design Basics. Reference manual. M .: Engineering, 1988.

Claims (2)

1. The locking connection, comprising a housing with a hole and an annular groove, provided with radial grooves on the side of the housing end, evenly spaced relative to the hole and extending into the annular groove, as well as a retaining ring with evenly spaced protrusions, located in the annular groove of the housing, characterized in that the diameter of the base of the protrusions corresponds to the diameter of the opening of the housing, the width and number of protrusions correspond to the width and number of grooves of the housing, the circlip is provided with a short grooved teeth spaced from the outer diameter of the protrusions by an amount exceeding the depth of the annular groove, bent into the grooves of the housing and made with a shift in the circumferential direction relative to the protrusions of the retaining ring, not exceeding half the angle between adjacent protrusions, the width and number of crown teeth corresponding to the width and the number of grooves in the housing. 2. A method of making a locking connection, as described in claim 1, comprising forming an annular groove in the housing with grooves extending into it, as well as inserting a retaining ring into the housing until it enters the annular groove, characterized in that the protrusions of the retaining ring are inserted through the grooves of the housing moreover, after the retaining ring enters the annular groove, it is rotated in the circumferential direction inside the annular groove until the crown teeth are aligned with the grooves of the housing, and then the crown teeth are bent into said housing grooves.

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