RU2540482C1 - Gun trunnion assy - Google Patents

Abstract

FIELD: weapons and ammunition.

SUBSTANCE: proposed assy comprises rolling bearing with resilient rollers fitted with interference arranged in circular clearance between trunnion and trunnion cage. Stiff rollers are additionally fitted in said bearing with clearance to alternate with resilient rollers.

EFFECT: longer life due to ruled out jamming caused by misalignment of trunnion cages.

4 cl, 2 dwg

Description

The invention relates to the field of military equipment and can be used in the development or modernization of guns.

Known trunnion unit of the tank guns 2A46M and 2A46M-1 with the I763 ETU500 roller bearing with rigid rollers installed in the gap between the trunnion and the journal sleeve (see "125A 2A46M, 2A46M-1 tank guns. Technical description and operating instructions 2A46M. TO. ", Moscow, Military publishing house, 1983).

A disadvantage of the known device is the presence of a radial clearance in the bearing, which does not provide a constant position of the barrel when firing and worsens the accuracy of shooting when the tank moves.

Also known trunnion gun assembly according to patent RU 2360201 C1, publ. 06/27/2009, which contains a roller bearing with hollow rollers located in an annular gap between the pin and the pin, with an interference fit between the pin and the pin, and an attachment ring mounted on the pin with a radial clearance with the pin. The attachment ring is made in the form of a separate part with a continuous cross section, and the hollow rollers are pivotally mounted on the bushings mounted between two plates fastened with them using rivets placed in the axial holes of the bushings. The force from the shot is transmitted to the trunnion clip of the gun through an attachment ring mounted on the trunnion of the gun to provide clearance with a trunnion clip, ensuring the rotation of the gun in a vertical plane.

The disadvantages of this device are:

- a possible increase in the friction moment in the trunnion assembly and its jamming and breakage due to sampling of the gap between the trunnion holder and the attachment ring due to, for example, mounting distortions of the trunnion holder of the gun in the wells of the object;

- in the case of weakening of the fastening of the trunnion clips in the wells of the object, due to the presence of a shoulder between the point of application of force from the attachment ring to the trunnion holder and the plane passing through the center of the circular bores in the wells of the object, misalignment of the trunnion clips and deformation of the elastic rollers uneven in length, leading to their destruction when fired.

During operation, the aforementioned shortcomings lead to the need to dismantle the gun from the facility at repair facilities and, thus, permanently disable the combat vehicle.

The task to which the claimed technical solution is directed is to create a simple and reliable in operation device of the axle gun assembly.

When implementing the claimed invention, the technical result achieved is to reduce the influence of the skew of the trunnion clips at the moment of friction in the trunnion assembly and to increase its service life.

The problem is solved, and the indicated technical result is achieved by the fact that in the trunnion assembly of the gun containing the rolling bearing with elastic rollers mounted with interference, located in the annular gap between the trunnion and the trunnion holder

- in the bearing are additionally installed with a gap, alternating with elastic rollers, hard rollers,

- rigid rollers are made with a solid cross section, and elastic rollers with an axial hole,

- elastic rollers with an interference fit, and rigid rollers with a gap are installed, alternating directly between the pin or the inner ring pressed onto it and the pin holder,

- it is possible to make the bearing assembly in the form of an inner ring pressed onto the trunnion and an outer ring pressed into the trunnion holder with elastic tensioned rollers between them and rigid rollers with a clearance.

The implementation of the bearing from alternating elastic and rigid rollers ensures operational reliability of the axle assembly. The implementation of the bearing with alternating rigid rollers with a solid cross section and elastic rollers with axial holes allows to absorb and extinguish the load from the gun from the gun with hard rollers, protecting the elastic rollers from excessive deformation, eliminate radial clearance in the pin assembly and ensure that the elastic rollers have a constant position barrel when fired. The bearing is installed without a gap between the pin and the pin holder, which reduces possible jamming of the pin node due to the misalignment of the pin clips in the wells of the object due to the weakening of the tightening of the pin clips or mounting warps, as in the prototype. The design solution of the device also eliminates the possible occurrence of friction, which destroys the details of the pin assembly.

The essence of the proposed technical solution is illustrated by drawings, which depict:

figure 1 is a General view of the trunnion site of the gun in section,

figure 2 is a section along the bearing of figure 1.

The trunnion assembly of the gun comprises a roller bearing located in the annular gap between the trunnion 1 and the trunnion holder 2. The rolling bearing consists of an inner ring 3, an outer ring 4, elastic rollers 5, hard rollers 6. Rigid rollers 6 are made with a solid cross section, and elastic rollers 5 are made with an axial bore. The outer ring 4 without a gap is installed in a pin journal 2, and the inner ring 3 without clearance is mounted on pin 1.

Between the inner ring 3 and the outer ring 4, elastic rollers 5 are alternately tightened alternately and hard rollers 6 with a clearance.

Possible placement of the rollers of the bearing assembly (not shown), consisting of alternating hard rollers 6 installed with a clearance, and elastic rollers 5 installed with an interference fit:

- directly in the annular gap between the pin 1 and the pin yoke 2;

- between the inner ring 3 pressed onto the trunnion and the trunnion holder 2.

The device operates as follows.

Bearings are mounted on the trunnions 1 and trunnion clips 2 of the gun without clearance. Stretched between the inner ring 3 and the outer ring 4, the elastic rollers 5 ensure no radial clearance in the bearing and a stable position of the trunnions 1 of the gun in the trunnion clips 2 during movement and after firing.

When firing from a gun, the force from the trunnions 1 of the gun, pre-deforming the elastic rollers 5 installed with an interference fit within the clearance between the inner 3 and outer 4 bearing rings and the hard rollers 6, closes on the hard rollers 6, protecting the elastic rollers 5 from breaking.

Thus, the proposed technical solution of the trunnion assembly of the gun ensures the reliability of the gun and increase the life of the object without repairing the trunnion assembly.

Claims (4)

1. A trunnion assembly of the gun, comprising a rolling bearing with elastic rollers installed with interference, located in an annular gap between the trunnion and the trunnion race, characterized in that the hard rollers are additionally installed in the bearing with a gap, alternating with the elastic rollers. 2. The trunnion assembly according to claim 1, characterized in that the rigid rollers are made with a continuous cross section, and the elastic rollers are made with an axial hole. 3. The trunnion assembly according to claim 2, characterized in that the elastic rollers are tightened and the rigid rollers with a clearance are installed directly between the trunnion or the inner ring pressed onto it and the trunnion holder. 4. The trunnion assembly according to claim 3, characterized in that the elastic rollers are tightened and the rigid rollers with a clearance are installed between the inner ring pressed onto the trunnion and the outer ring pressed into the trunnion holder.

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