RU2635208C1 - Set of tools for organizational repair of running gear of armoured vehicles of machines on their basis - Google Patents

Abstract

FIELD: machine engineering.

SUBSTANCE: set of tools comprises a set of keys with replaceable heads, locking rings, locking pins and a key for nut tightening control. The set contains a torque amplifier with a reaction support and a splined adapter. The torque amplifier is equipped with a ratchet mechanism with a reversing lock and a transition square with a transverse hole for fixing exchangeable heads and a splined adapter by the locking pin on it. The splined adapter is made in the form of a monolithic body with two splined bushings located on two opposite sides, on the inner surface of one of the bushings slots are cut for alignment with the slots of the cork of the machine driving wheel, and on the other side the bushing is provided with an input inner rectangular groove for mounting transitional square of torque amplifier therein.

EFFECT: increased reliability, efficiency, safety and ease of screwing, unscrewing operations of the threaded connections of the running gear.

6 cl, 1 dwg

Description

The invention relates to the field of mechanical engineering, in particular to an operational set of tools and means of small-scale mechanization for performing military repairs of the chassis of tanks.

Currently, a large number of diverse sets of tools are known, including wrenches for use in various fields of the national economy. A set of wrenches is known (RU 2229971, class B25B 13/56, 2004) containing a wrench with a half-open throat, a ring crank wrench and a ring wrench bent in the plane of application of torque. This kit can only be used for installation and dismantling of the railway towing device, which limits its scope.

Also known is a tool kit (US 4517862, class B25B 13/02) containing a pair of double-sided wrenches, each with an open spanner at one end and a ring spanner at the other end. The cuttings of each key have a circular cross section, with the possibility of a tool sliding on it. One of these sliding tools is a hook made with the possibility of engaging the transverse steering rod to facilitate its adjustment. Another sliding tool comprises an offset screwdriver with an adjustable lever arm. Wrenches can be attached to each other, for safe storage with a square pin on one of the sliding tools.

However, with this tool kit it is not possible to provide the torque control specified by the manufacturer of the military equipment for repair and maintenance of the BTVT undercarriage by military repair bodies.

A known tool for mounting and dismounting threaded connections (RU 2274542, class B25B 13/56, 2006), which is a set (set) of keys and cartridges for mounting and dismounting self-locking spring nuts, which includes a key for mounting and dismounting self-locking spring nuts with closed turns and radial loading of thread, a key for mounting and dismounting self-locking spring nuts with open turns and radial-axial thread loading, cartridge for mounting and dismounting of self-locking spring nuts with radial loading zheniem thread and with closed loops, the cartridge mounting-dismounting caulking nut with radially spring-axial loading-open thread and turns the key to control the caulking nut tightening spring in the threaded joint.

Known mechanisms, fixtures, wrenches, tools used to tighten-unscrew nuts do not have sufficient reliability and efficiency, and can only be used for traditional "tested" designs with insufficient reliability and efficiency.

The prototype of the invention is an operational set of tools for repairing armored vehicles (Repair of armored vehicles I.Yu. Lepeshinsky et al. Omsk, OmSTU Publishing House, 2011, pp. 71-79). To perform military repair of BTVT, sets of special keys and accessories are used, which include a single set of special keys (EKSK), a set of keys with interchangeable heads, handles, rods, lock pins, hinges, locking rings, reaction supports (length from 1 to 2 m ) An arrow torque wrench is used to tighten the nuts. Analyzing the tools and devices used in performing the operations of unscrewing / twisting the critical threaded joints of the undercarriage of the armored vehicles (BTVT), we can note their cumbersomeness and the lack of precise regulation of the tightening torque. Existing special keys, fixtures and tools do not allow to fully tighten with a standardized force, which can lead to operational damage to the BTVT objects.

Carrying out military repairs of BTVT objects requires the exact fulfillment of technical specifications for the replacement of units. So the under-tightening of the drive wheel plug (the tightening torque of which is 400-450 kgf⋅m) of the T-72 and T-80 tanks leads to the fact that the surface of the outer cone of the drive wheel is rusting, which requires considerable effort to dismantle it, which can often lead to and the impossibility of dismantling it. As a result, in case of failure of the mounting bolts of the bushings or the drive wheel bearing, the replacement of both assembly units is required.

The technical problem of the invention is the bulkiness of the tools, the impossibility of loosening and tightening operations (with a tightening torque of 400-450 kgf кгm) of the drive wheel tube of armored vehicles (BTVT) in accordance with the requirements of regulatory and technical documentation, and the complexity of maintenance.

The solution to the technical problem is to increase the reliability, efficiency, safety and facilitate the screwing / unscrewing operations of the threaded joints of the BTVT undercarriage by developing a new set of tools that provides repair and technical work of the BTVT in accordance with the requirements of regulatory and technical documentation.

The solution to the technical problem is achieved by the fact that a set of tools for military repair of the chassis of armored vehicles of vehicles based on them includes a set of keys with interchangeable heads, locking rings, lock pins and a key for controlling the tightening of the nut. According to the invention, the kit further comprises a torque amplifier with a reaction support and a spline adapter. The torque amplifier is equipped with a ratchet mechanism with a backstop and a transition square with a transverse hole for fixing on it with a locking pin of interchangeable heads and a spline adapter. A splined adapter, made in the form of a monolithic case with two splined bushings located on two opposite sides, slots are cut on the inner surface of one of the bushings to align them with the slots of the BTVT drive wheel, and on the other side the bush is made with an input internal rectangular groove for installation in it the transition square of the torque amplifier.

The key for controlling the tightening of the nut is made with a torque handle having an adjustable scale in increments of 10 Nm in the range from 40 to 170 Nm.

The torque amplifier is equipped with additional extensions and is designed with a gain of 1:26 and with a maximum amplifier torque of 4600 Nm.

The interchangeable heads of the set of keys are made of impact, hexagonal sizes of 27 mm, 32 mm, 36 mm and 41 mm with locking rings and locking pins for dismantling high-strength threaded joints of all nodes of the BTVT chassis.

The spline adapter sleeve for covering the drive wheel plug is made with teeth with an involute profile, the number of which corresponds to the number of teeth of the drive wheel plug.

Equipping the torque booster (multiplier) with a ratchet mechanism with a backstop prevents the reaction support from moving away from the stop when the torque wrench is idling, which in turn eliminates the sudden sharp movement of the reaction support in the direction opposite to the direction of operation, when it breaks from the stop. Without a backstop with a torque wrench, it is necessary to rotate 360 ° so that the reaction support of the multiplier does not move away from the stop. However, this is often impossible due to obstacles. Thanks to the backstop, the multiplier locks on the nut, since it is firmly attached to the thrust plate at the point of application of the reactions. This means that the multiplier maintains its own weight even in an inverted position. Availability included

Equipping the kit with a slotted nozzle in the form of through slots allows it to be used as an intermediate link between the drive wheel plug and the square of the torque amplifier (multiplier), which facilitates the process of unscrewing / twisting the drive wheel tube plugs of the BHT chassis, located on both sides of the drive axle. The execution on the inside at one end of the body of the nozzle of teeth with an involute profile and with the number of teeth corresponding to the number of teeth of the drive wheel plug provides easy and reliable installation of the nozzle on the drive wheel plug in military conditions during repair work, including in the field without additional sources (electric generator, compressor). The involute tooth profile has great strength and ensures alignment of the combined elements, as well as withstands the applied forces of 400-450 kgf (4000-4500 Newton per meter).

The execution on the opposite side of the body of the nozzle of a rectangular groove makes it possible to install an output multiplier square in it, which saves an expensive tool from breakage during repair work.

The presented set of tools will make it possible to exclude a number of bulky tools and devices from the ZIP-O, EKUP and EKSK and to reduce the downtime of BTVT in repair.

The invention is illustrated in the drawing, which presents a set of tools for unscrewing / twisting the plugs of the drive wheel of the chassis of the armored vehicles.

The kit includes a set of wrenches made with interchangeable hexagonal impact heads 1 with a size of 27 mm, 2 with a size of 32 mm, 3 with a size of 36 mm and 4 with a size of 41 mm, a wrench 5 for controlling the tightening of the nut with a torque handle having an adjustable scale in the range from 40 to 170 Nm, a torque amplifier - a multiplier 6 with a gain of 1:26, a spline adapter 7, locking pins 8 and locking rings 9.

Slot adapter 7 is made in the form of a steel monolithic case with two splined bushings, one of which is made with teeth with an involute profile, the number of which corresponds to the number of teeth of the tube, and the other sleeve is made with a rectangular groove for installation of transition square 10 of multiplier 6 in it. Transition square 10 is made with a transverse hole (not shown in FIG.) For fixing with locking pins 8 of interchangeable heads 1-4 of the keys and adapter 6.

A set of tools for unscrewing / twisting the plugs of the driving wheel of the chassis of the armored vehicles works as follows.

To unscrew the bolts of fastening the bushings of the balancer BTVT, it is necessary to install the multiplier 6 assembled on the bolt head with the adapter 7 and the reaction support (not shown in Fig.), Resting it in the nearest rigidly mounted element of the tank structure, for example, in a caterpillar track or track roller. Then put on the dynamometer handle of the key 5 to control the tightening of the nut, the torque value equal to 170 Nm (1668 kgf). Set the torque gauge on the multiplier 6 with a scale in the direction of the tank body. By rotating the torque wrench of the key 5, loosen the bolt, remove the multiplier 6 and loosen the bolt freely.

To tighten the bolts of the balancer bush multiplier 6, it is necessary to install the lock washers and tighten the bolts of the balancer bush. Install the multiplier 6 assembly with the adapter 7 and the reaction support onto the head of the bolt, resting it on the nearest rigidly mounted element of the tank structure, for example, in a caterpillar track or track roller. On the dynamometer handle of the key 5 set the torque value equal to 49 Nm (481 kgf), and for the lower bolts of the bushings of the balancers of the front suspensions - 64 Nm (628 kgf). Set the torque wrench of the key 5 on the multiplier 6 with a scale in the direction opposite to the hull of the tank. The rotation of the dynamometer handle of the key 5 tightens the bolt (the required tightening torque is determined by clicking in the handle of the key 5). Then remove the multiplier 6.

Unscrewing - wrapping the drive wheel attachment plug using a tool kit.

On the outer teeth of the special key 432.95.315Sb-1, a multiplier 6 is installed complete with an adapter 7 and a reaction support, resting it in the nearest rigid element. The adapter 7 is fixed on the square 10 of the multiplier 6 with the help of a pin 8, which is inserted into the holes of the square 10, combined with the hole of the square of the multiplier 6 and fixed with a locking ring. Expose on the dynamometer handle of the wrench 5 the torque value equal to 170 Nm (1668 kgf⋅m). Set the torque wrench of the key 5 to the amplifier 6 in the direction of the body of the BHT and rotate the handle to loosen the tightening of the drive wheel mounting tube. Then the animator 6 is removed and the cork is loosened without effort with the special key 432.95.315Sb-1. Wrap the cork in the reverse order.

The use of a new operational tool kit will allow dismantling the assemblies and assemblies of the BTVT undercarriage without much physical effort, by one repairman with the ability to control the tightening torque due to the use of planetary gears and dynamical attachments in the multipliers and can be used in all industries and production areas. This circumstance will make it possible to replace a number of bulky full-time special tools and devices and to reduce the downtime of BTVT in repair. When comparing the standard set of tools, the mass of which is 66.22 kg, with the total weight of the declared set of tools, which = 12.42 kg, it is clear that the mass of the standard tool exceeds the declared three times.

The presented examples of performing BTVT repair operations with an operational set of tools are not exhaustive and other operations may be performed that require unscrewing / screwing threaded joints with the required, normalized tightening. The set of tools due to the reduced weight and size allows it to be used both in the field and in the factory.

A set of tools for military repair of the chassis of armored vehicles of vehicles based on them successfully passed all stages of testing on the basis of the Federal State Institution NIIII of the RF Ministry of Defense in Kubinka, as part of the execution of the State Defense Order in the interests of the Ministry of Defense of the Russian Federation. Since 2017, it is planned to switch to mass production of sets. Tool kits have no analogues in the Russian Federation in terms of reliability, technical parameters, ergonomics and weight, and allow you to replace a number of bulky tools and devices, as well as significantly reduce the downtime of BTWT in repair.

Claims (6)

1. A set of tools for repairing the chassis of an armored vehicle, including a set of keys with interchangeable heads, retaining rings, lock pins and a wrench for controlling the tightening of the nut, characterized in that it contains a torque amplifier with a reaction support and a spline adapter, while the torque amplifier the moment is equipped with a ratchet mechanism with a backstop and a transition square with a transverse hole for fixing on it with a locking pin of interchangeable heads and a spline adapter, and the spline adapter it is complete in the form of a monolithic case with two splined bushings located on two opposite sides, with slots cut into the inner surface of one of the bushings to align with the splines of the drive wheel of the said machine, and on the other hand, the sleeve is made with an input internal rectangular groove for installation in it transient squared torque amplifier. 2. The kit according to claim 1, characterized in that the key for controlling the tightening of the nut is made with a torque handle having an adjustable scale in increments of 10 Nm in the range from 40 to 170 Nm. 3. The kit according to claim 1, characterized in that the torque amplifier is made with additional extension cords. 4. The kit according to p. 1, characterized in that the torque amplifier has a gain of 1:26 and a maximum amplifier torque of 4600 Nm. 5. The kit according to claim 1, characterized in that the interchangeable heads of the set of keys are made of impact, hexagonal, 27 mm, 32 mm, 36 mm and 41 mm in size with locking rings and lock pins for dismantling high-strength threaded joints of machine chassis parts. 6. The kit according to claim 1, characterized in that for covering the driving wheel plug, the spline adapter sleeve is made with teeth with an involute profile, the number of which corresponds to the number of teeth of the driving wheel tube of the machine.

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