Final drive for a snow and marsh vehicle

Abstract

A final drive for a snow and marsh vehicle comprises a housing (1) containing an input shaft (3) and an output shaft (4), with a gear transmission that includes a gear (5) and a toothed wheel (6) which are connected to said shafts. The housing (1) has a flattened shape with projecting fastening elements and is equipped with an O-shaped main cover (2). The housing (1) and the cover (2) have mounting openings (10) to allow the mounting of the shafts and the adjustment of bearings. The housing contains a pin (11) for the coaxial mounting of the output shaft thereon, wherein the pin is rigidly fastened inside the housing and the base of the pin is encompassed by a projection (12) formed in the housing.

Description

SNOW AND SWAMP VEHICLE FINAL REDUCER

[0001] The invention relates to transport engineering, to the design of a final drive used as an external reduction gear to increase ground clearance, improve cross-country ability, and can be used in vehicles with increased cross-country ability, such as snow and swamp vehicles and all-terrain vehicles.

[0002] The BTR-80 final drive is known [1] comprising a housing with a cover, with input and output shafts located in it, with a gear transmission including a pinion and a toothed wheel connected to the shafts. The housing is made with protruding fasteners and contains an axis intended for coaxial installation of the output shaft, the axis is fixedly fixed in the housing, the base of the axis is covered by a projection made in the housing. The input shaft is made solid and contains a pinion, and rests on two tapered roller bearings. The output shaft is made in the form of a sleeve, at one end of which a toothed wheel is located, made in the form of a crown, at the other end a hub is seated, made in the form of a cup, in which a brake drum is located, and a brake mechanism. The axis is equipped with two channels intended for air supply, for pumping the wheel from the central pumping line and for supplying brake fluid from the brake system line to the brake mechanism.

[0003] The gearbox [1] is not suitable for all-terrain vehicles equipped with brake mechanisms located in the boat. The gearbox is bulky, has a high mass, the design complicates repair and adjustment, and does not provide for the release of excess internal pressure in the sealed housing. The disadvantage of the gearbox is that the wheel hub is made in the form of a cup and at the same time with drum brakes, which increases the dimensions of the hub and does not allow the hub to be used to install all-terrain vehicles, snow and swamp vehicles. The gearbox containing the brake mechanism in the hub has increased dimensions and mass. The brake system channel passing through the axle does not allow increasing the diameter of the channel for pumping the wheel and running it through the center. The housing cover does not contain an installation window for the input shaft, which does not allow for adjusting the preload of the input shaft bearings using adjusting rings.The input shaft is designed to interact with the axle via a cardan drive, while the input shaft flange is made as a separate part, seated on splines on the input shaft, pressed with a nut. This design reduces the reliability of the shaft connection with the cardan drive; the flange may turn on the shaft splines due to wear and tear and jerks. The splines are subject to contamination since the connection is located outside the sealed housing. The toothed ring is press-fitted onto the output shaft, which complicates the repair of the output shaft and the replacement of the toothed ring, its removal and installation. The housing fastening elements do not allow the gearbox to be installed on the all-terrain vehicle.

[0004] A final drive [2] is known, intended to increase the cross-country ability of a vehicle, contains a gear transmission with internal engagement and a bracket holding the axis of rotation of the vehicle wheel. The bracket is adapted for installation on a standard wheel hub of the vehicle with the ability to rotate relative to it and is provided with means for fastening to vehicle elements. The drive pinion with external teeth is adapted for fastening directly to the standard wheel hub of the vehicle, and the driven gear wheel with internal teeth is made in the form of a ring with a toothed rim and is adapted for direct fastening to the wheel disk of the vehicle. The axis of rotation of the wheel of the vehicle is mounted in the bracket on bearings and is provided with a hub similar to the standard wheel hub of the vehicle.

[0005] The open type gearbox is subject to contamination and foreign objects getting into the moving mechanisms, which leads to accelerated wear and tear and breakdowns, not suitable for all-terrain vehicles. There is no unit for pumping up the wheels.

[0006] A final drive of a vehicle is known [3]. It contains a gear transmission and a bracket holding the axis of rotation of the vehicle wheel. The bracket is adapted for installation on the standard wheel hub of the vehicle with the ability to rotate relative to it and is provided with means for fastening to vehicle elements. The drive pinion with external teeth is adapted for fastening directly to the standard wheel hub of the vehicle, and the driven gear wheel with internal teeth is made in the form of a ring with a toothed rim and is adapted for direct fastening to the wheel disk of the vehicle. The axis of rotation of the wheel of the vehicle is mounted in the bracket on bearings and is provided with a hub similar to the standard wheel hub of the vehicle.

[0007] The gearbox [3] is not suitable for all-terrain vehicles, the hub does not allow the installation of all-terrain vehicle wheels, snow and swamp vehicles. The housing does not have connecting / fastening elements that allow the gearbox to be installed on an all-terrain vehicle. The housing cover does not contain a mounting window for the input shaft, which does not allow for the adjustment of the input shaft bearing preload using adjusting rings. The gear is mounted on the output shaft using a splined connection, which reduces reliability, since wear and damage to the splines lead to the gear turning on the shaft.

[0008] Thus, the known state-of-the-art final drives have disadvantages and it is necessary to expand the range of known final drives for off-road vehicles, snow and swamp vehicles, and all-terrain vehicles.

[0009] The final drive for an all-terrain vehicle comprises a housing with input and output shafts located therein, with a gear transmission including a pinion and a gear wheel connected to the shafts. The housing is made flat with protruding fasteners, equipped with an O-shaped main cover. The housing and the cover are made with mounting holes for installing the shafts and adjusting the bearings. The housing contains an axle intended for coaxial installation of the output shaft, the axle is fixedly fixed in the housing, the base of the axle is covered by a projection made in the housing. The input shaft is made integral with a flange and contains a gear made in the form of a sleeve seated on the shaft, the gear is fixed on the input shaft and pressed with a nut, the gear rests on two tapered roller bearings, one bearing is installed in the housing, the other bearing is installed in the cover, the gear is connected by constant engagement to the gear wheel for transmitting rotation.The output shaft is made in the form of a sleeve of a transition diameter, equipped with a flat round flange, performing the function of a hub, on one end of which a gear wheel made in the form of a crown is mounted and fixed with screws, on the other end of the sleeve a flange is fixed with bolts from the end, intended for installing the wheel, a flat flange with holes containing studs. The output shaft is mounted with the possibility of rotation on two tapered roller bearings, one bearing rests on the axle, the second bearing rests on the housing projection in which the axle base is fixed. The axle is equipped with a through axial channel intended for feeding a gas mixture, at the outlet of the channel, with the possibility of rotation, a wheel inflation nipple is installed. The input shaft is made integral with the flange, intended for interaction through the cardan drive with the bridge. The output shaft is intended for connection through the flange to the wheel rim.The output shaft support bearing, mounted on the housing projection, is located in the same plane as the gear transmission.

[0010] The technical result consists in expanding the arsenal of technical means and final drives for a wheeled snow and swamp vehicle.

[0011] The technical task is to improve the design of the final drive for a wheeled snow and swamp vehicle, ensuring a reduction in the torque loading the drive axles and its increase when driving off-road.

[0012] The problem is solved in that the final drive for an all-terrain vehicle comprises a housing with input and output shafts located therein, with a gear transmission including a pinion and a gear wheel connected to the shafts. The housing is made flat with protruding fasteners, equipped with an O-shaped main cover. The housing and the cover are made with mounting holes for installing the shafts and adjusting the bearings. The housing contains an axle intended for coaxial installation of the output shaft, the axle is fixedly fixed in the housing, the base of the axle is covered by a projection made in the housing. The input shaft is made integral with a flange and contains a gear made in the form of a bushing, seated on the shaft, the gear is fixed on the input shaft and pressed with a nut, the gear rests on two tapered roller bearings, one bearing is installed in the housing, the other bearing is installed in the cover, the gear is connected by constant engagement to the gear wheel for transmitting rotation.The output shaft is made in the form of a sleeve of a transition diameter, equipped with a flat round flange, performing the function of a hub, on one end of which a gear wheel made in the form of a crown is mounted and fixed with screws, on the other end of the sleeve a flange is fixed with bolts from the end, intended for installing the wheel, a flat flange with holes containing studs. The output shaft is mounted with the possibility of rotation on two tapered roller bearings, one bearing rests on the axle, the second bearing rests on the housing projection in which the axle base is fixed. The axle is equipped with a through axial channel intended for feeding a gas mixture, at the outlet of the channel, with the possibility of rotation, a wheel inflation nipple is installed. The input shaft is made integral with the flange, intended for interaction through the cardan drive with the bridge. The output shaft is intended for connection through the flange to the wheel rim.The output shaft support bearing, mounted on the housing projection, is located in the same plane as the gear transmission.

[0013] The technical solution does not have the described problems inherent in known analogues. The design simplifies the manufacturing technology, simplifies the operation of mounting and dismounting the wheel, and also increases the overall reliability, operational and technological characteristics.

[0014] The advantages over the prototype [1] are increased reliability, maintainability, reduced weight, provision of reliable relief of excess pressure from the housing, increased heat transfer, and a reduction in the amount of consumables during manufacturing and repair. Figure 1

[0015] Front final drive, sectional view; Figure 2

[0016] Front final drive, general view; Figure 3

[0017] Rear final drive, sectional view. Description of implementation

[0018] The final drive for the all-terrain vehicle (;;) comprises a housing 1 with a cover 2. The housing 1 with the cover 2 form a sealed container filled with lubricant. The housing 1 contains an input shaft 3 and an output shaft 4, with a gear transmission including a pinion 5 of the input shaft 3 and a gear wheel 6 of the output shaft 4. The shafts and other parts have elastic seals, cuffs 7 preventing lubricant leakage in places of a movable joint.

[0019] The housing 1 is made of solid metal, flattened with protruding fasteners. In the upper part of the housing, there is an upper boss 8 in the form of an L-shaped lever, located horizontally, with an opening. In the lower part of the housing, there is a lower boss 9 with an opening. Bosses 8 and 9 provide the ability to attach the housing 1 of the gearbox to the all-terrain vehicle, and connect with the suspension elements.

[0020] The body 1 is equipped with an O-shaped main cover 2, the body 1 and cover 2 are made with mounting holes 10 for installing shafts 3 and 4 and adjusting the bearings. Cover 2 is made on the outer surface with shaped heat-dissipating elements 31 made on the outer surface of cover 2 in the form of ribs and recesses, ensuring an increase in the surface area dissipating heat, while the said elements perform the function of stiffening ribs.

[0021] The housing contains an axis 11 (journal), on which the output shaft 4 is coaxially mounted. The axis 11 is fixedly secured in the housing 1; for this purpose, an opening with a projection 12 enclosing the axis is made in the housing 1. The base of the axis 11 is covered by the housing material along its length until it stops against the flange.

[0022] Input shaft 3 is made of solid metal with a mounting flange 13 for connection with the drive cardan shaft. Input shaft 3 contains gear 5 made in the form of a bushing, seated on shaft 3 on splines. Gear 5 is secured on input shaft 3 and pressed by nut 14 with a lock washer. Gear 5 is fixed from longitudinal movement by bearings, rests on two tapered roller bearings 15 and 16. One bearing 15 is installed in housing 1, the other bearing 16 is installed in cover 2. Gear 5 is connected by constant engagement with toothed wheel 6 for transmitting rotation. Input shaft 3 is made integral with flange 13, intended for interaction through the cardan drive with the bridge.

[0023] For installation of input shaft 3, a mounting hole 10 is made in housing 1, closed by inner cover 17, and a mounting hole 10 is also made in cover 2, closed by outer cover 18, which also allows adjustment of the preload of bearings 15 and 16 due to adjusting rings 19, located between bearing 16 and outer cover 18.

[0024] The output shaft 4 is made in the form of a sleeve of a transition diameter, equipped with a flat round flange 20, intended for mounting the wheel rim. On one end of the output shaft 4, a gear wheel 6 is mounted, made in the form of a crown. The gear wheel 6 is fixed on the output shaft with screws 29, which ensures ease of removal and installation of the gear wheel 6 on the shaft 4, and at the same time increases the reliability of the fit, eliminating wear of the splines and rotation of the gear wheel 6 on the shaft 4. On the other end of the output shaft 4, threaded holes are made at its end, and ten studs with nuts 30 are installed on which the flange 20 is fixed, intended for installing the wheel rim. The flange 20 is made round and flat, with holes containing six studs 21 with nuts, ensuring fastening of the wheel rim of the all-terrain vehicle. The number of studs (pos. 21 and 30) ensures reliable fastening of the rim and transmission of torque from shaft 4. Output shaft 4 is designed for connection through flange 20 with the wheel rim.

[0025] The output shaft 4 is mounted with the possibility of rotation on two tapered roller bearings 22 and 23. One bearing 22 rests on the axis 11, the second bearing 23 rests on the outer surface of the projection 12 of the housing 1, in which the base of the axis 11 is fixed. The support bearing 22 of the output shaft 4, mounted on the projection 12 of the housing 1, is located in the same plane as the gear transmission, which allows for the optimal distribution of loads on the housing and shafts.

[0026] The axle 11 is equipped with a through axial channel 24, intended for feeding a gas mixture, such as air, from the central line of the inflation system to the wheels. At the outlet of the channel 24, with the possibility of rotation, a nozzle 25 for inflating the wheels is installed.

[0027] The support bearing 22 of the output shaft 4, mounted on the projection 12 of the housing 1, is located in the same plane as the gear transmission. The flange 20 of the output shaft 4 adjoins the outer plane of the bearing 23, which reduces the cantilever loads on the shaft 4 from the wheel side.

[0028] In the upper part of the housing 1 there is a breather 26 made in the form of a hole with a groove and a tube, which ensures the release of excess internal pressure in the sealed housing.

[0029] The proposed version of the final drive expands the range of gearboxes applicable for wheeled snow and swamp vehicles, provides the ability to reduce the torque loading the drive axles and increase the torque when driving off-road. Example

[0030] Example 1.

[0031] The front gearbox (;) is made as described above, wherein (the description above is included in the description of variant 1 by this reference). In the front final drive for an all-terrain vehicle, comprising a housing 1 and a main cover 2, with shafts 3 and 4, a gear 5 and a toothed wheel 5, connecting elements located therein, the housing is made flat with protruding elements, a boss 8 in the form of an L-shaped lever, and a lower boss 9 made flat with an opening parallel to the boss 8. The housing 1 performs the function of a steering knuckle.

[0032] The housing 1 and the main cover 2 are provided with mounting holes 10, in which the input shaft 3, equipped with a gear 5, is located by means of tapered roller bearings. An axis 11 is fixedly mounted in the housing 1, on which the output shaft 4 with a flange 20 (performing the function of a hub) equipped with a gear wheel 5 (crown) is located by means of tapered roller bearings 15 and 16, also the axis 11 has a through central hole, a channel 24 for pumping up the wheels (passing the air flow, pneumatic channel), a breather 26 is located in the upper part of the housing 1 in the form of an opening with a groove, in addition, an air supply mechanism from a fixed element and a rotating sleeve with a nipple 25 is fixed on the axis 11. The input shaft 3 interacts with the bridge via a cardan drive, the output shaft 4 interacts with the rim of the snow and swamp vehicle wheel via an original flange 20.

[0033] Example 2.

[0034] The rear final drive for an all-terrain vehicle () comprises a housing 1 with a cover 2. The housing 1 with the cover 2 form a sealed container filled with lubricant. The sealing of the internal cavity from the external environment is performed by using two cuffs for each unit and labyrinth seals. The housing 1 contains an input shaft 3 and an output shaft 4 with a gear transmission including a pinion 5 of the input shaft 3 and a gear wheel 6 of the output shaft 4. The shafts and other parts have elastic seals, cuffs 7 preventing lubricant leakage in places of a movable joint.

[0035] The housing 1 is made of solid metal flattened with protruding fastening elements. In the upper part of the housing there is an upper boss 8 in the form of an L-shaped lever located horizontally, with an opening. In the lower part of the housing there is a lower boss 9 flat in the vertical plane with an opening. Bosses 8 and 9 provide the possibility of fastening the housing 1 of the gearbox to the all-terrain vehicle, connection with the suspension elements.

[0036] The body 1 is equipped with an O-shaped main cover 2, the body 1 and cover 2 are made with mounting holes 10 for installing shafts 3 and 4 and adjusting the bearings. Cover 2 is made on the outer surface with heat-dissipating elements 31 made on the outer surface of cover 2 in the form of ribs and recesses, ensuring an increase in the surface area dissipating heat, while the said elements perform the function of stiffening ribs.

[0037] The housing contains an axis 11 (journal), on which the output shaft 4 is coaxially mounted. The axis 11 is fixedly secured in the housing 1; for this purpose, an opening with a projection 12 enclosing the axis is made in the housing 1. The base of the axis 11 is covered by the housing material along its length until it stops against the flange.

[0038] Input shaft 3 is made of solid metal with a mounting flange 13 for connection with the drive cardan shaft. Input shaft 3 contains gear 5 made in the form of a bushing, seated on shaft 3 on splines. Gear 5 is secured on input shaft 3 and pressed by nut 14 with a lock washer. Gear 5 is fixed from longitudinal movement by bearings, rests on two tapered roller bearings 15 and 16. One bearing 15 is installed in housing 1, the other bearing 16 is installed in cover 2. Gear 5 is connected by constant engagement with toothed wheel 6 for transmitting rotation. Input shaft 3 is made integral with flange 13, intended for interaction through the cardan drive with the bridge.

[0039] For installation of input shaft 3, a mounting hole 10 is made in housing 1, closed by inner cover 17, and a mounting hole 10 is also made in cover 2, closed by outer cover 18, which also allows adjustment of the preload of bearings 15 and 16 due to adjusting rings 19, located between bearing 16 and outer cover 17.

[0040] The output shaft 4 is made in the form of a sleeve of transition diameter, equipped with a flat round flange 20, performing the function of a hub for mounting the wheel rim. On one end of the output shaft 4, a gear wheel 6 is mounted, made in the form of a crown. The gear wheel 6 is fixed on the output shaft with screws (bolts, which ensures ease of removal and installation of the gear wheel 6 on the shaft 4, and at the same time increases the reliability of the fit, eliminating wear of the splines and rotation of the gear wheel 6 on the shaft 4. On the other end of the output shaft 4, threaded holes are made at its end, and flange 20 is secured with bolts, intended for installing the wheel. Flange 20 is made round and flat, with holes containing studs 21. Output shaft 4 is intended for connection through flange 20 with the wheel rim.

[0041] The output shaft 4 is mounted with the possibility of rotation on two tapered roller bearings 22 and 23. One bearing 22 rests on the axis 11, the second bearing 23 rests on the outer surface of the projection 12 of the housing 1, in which the base of the axis 11 is fixed.

[0042] The axle 11 is equipped with a through axial channel 24, intended for feeding a gas mixture, such as air, from the central line of the inflation system to the wheels. At the outlet of the channel 24, with the possibility of rotation, a nozzle 25 for inflating the wheels is installed.

[0043] The support bearing 22 of the output shaft 4, mounted on the projection 12 of the housing 1, is located in the same plane as the gear transmission. The flange 20 of the output shaft 4 adjoins the outer plane of the bearing 23, which reduces the cantilever loads on the shaft 4 from the wheel side.

[0044] In the upper part of the housing 1 there is a breather 26 made in the form of a hole with a groove and a tube.

[0045] The proposed invention allows, thanks to the use of the minimum possible number of elements (simplicity of design) in this final drive, to reduce weight, make the gearbox more compact, reduce the amount of consumables (oil) when converting and transmitting torque to transmission elements that do not require a large number of technological design elements.

[0046] The advantage of the proposed gearbox when used on an all-terrain vehicle:

[0047] - reduction of gearbox weight by moving the brakes to the all-terrain vehicle axles;

[0048] - original shape of the cast body and simplified design of the suspension mount (use of common components);

[0049] - a simpler design of the tire inflation line.

[0050] - the presence of a breather to release pressure from the housing;

[0051] - increased safety margin in bearing assemblies due to the location and reduction of cantilever loads;

[0052] - more reliable fastening of the hub axle;

[0053] - more reliable sealing of the internal cavity from the external environment (due to the use of two cuffs for each unit and labyrinth seals).

[0054] For use, the gearbox is installed on the all-terrain vehicle, connected to the suspension elements, and mounted on the wheel rim flange 20. The input shaft 3 is connected to the drive cardan shaft through the flange 13.

[0055] During assembly and repair, preload of tapered bearings 22 and 23 is performed in the following sequence:

[0056] - turning flange 20 for self-installation of bearings 22 and 23, tighten hub nut 27 until it stops;

[0057] - unscrew the hub bearing nut by one or two edges, turning the hub by hand, check the ease of its rotation and tighten nut 27 for adjusting bearings 22 and 23 of the hub to a torque of 30-40 Nm;

[0058] - check the adjustment of bearings 22 and 23; if adjusted correctly, flange 20 (hub) should rotate freely, without jamming or noticeable axial clearance.

[0059] - secure nut 27 from loosening by bending washer 28 onto the edge of the nut.

[0060] When assembling, lubricate the working edges of the seals 7 (cuffs, rings) with mineral oil.

[0061] After final assembly, pour industrial oil I-20A GOST 20799-88 in the cavity of the gearbox housing in the volume of (1.4 +1) l. The gearbox is equipped with plug 32 for draining and filling the oil.

[0062] Flange 20, which functions as a wheel hub, is made in the form of a flat disk and provides the ability to mount the all-terrain vehicle wheel with the ability to pump it through the nipple 25 from the central pumping system. In this case, the brakes are located in the boat of the all-terrain vehicle, which allows to reduce the dimensions of the gearbox and hub, allows to use flange 20 for installing all-terrain vehicle wheels, snow and swamp vehicles. Channel 24 passing through axle 11, in the center, allows to increase the diameter of the channel for pumping the wheel and install nipple 25 at its outlet, through a threaded adapter with a bearing unit. Cover 2 of housing 1 contains mounting windows 10 for input shaft 3, which allows to adjust the preload of bearings 15 and 16 of the input shaft using adjusting rings 19, and also provides the ability to freely remove and install the shaft.Input shaft 4 is designed to interact with the axle via a cardan drive, while input shaft flange 13 is formed directly on shaft 3, which reduces the risk of flange 13 breaking off, as this occurs in models where the flange is splined onto the input shaft and pressed with a nut. The shafts do not contain splined connections located outside the sealed housing that are subject to contamination. Toothed ring 6 is seated on output shaft 4 using screws 29, which allows the output shaft to be removed and repaired, or the toothed ring to be replaced. Fastening elements, the upper boss 8, in the form of an L-shaped lever with a seat, and the lower boss 9 with a mounting hole, allow the gearbox to be installed on the all-terrain vehicle and used to transmit torque.

[0063] Manufacturing is possible using industrially produced devices and materials; its elements can be manufactured and assembled both by hand and at modern industrial enterprises.

[0064] 1 - body;

[0065] 2 - cover;

[0066] 3 - input shaft;

[0067] 4 - output shaft;

[0068] 5 - gear;

[0069] 6 - gear wheel;

[0070] 7 - seal;

[0071] 8 - upper boss (L-shaped lever with seat);

[0072] 9 - lower boss with mounting hole;

[0073] 10 - mounting hole;

[0074] 11 - axis;

[0075] 12 - protrusion;

[0076] 13 - flange;

[0077] 14 - nut;

[0078] 15 - bearing;

[0079] 16 - bearing;

[0080] 17 - inner cover;

[0081] 18 - outer cover;

[0082] 19 - adjustment ring;

[0083] 20 - flange;

[0084] 21 - hairpin;

[0085] 22 - bearing;

[0086] 23 - bearing;

[0087] 24 - channel;

[0088] 25 - nipple;

[0089] 26 - breather;

[0090] 27 - hub nut;

[0091] 28 - washer;

[0092] 29 - screw (bolt);

[0093] 30 - hairpin;

[0094] 31 - heat-dissipating elements;

[0095] 32 - cork.

[0096] Source 1: https: / triptonkosti.ru / 25-foto / kolesnyj-reduktor-btr-80-shema.html

[0097] Source 2: patent RU 179573

[0098] Source 3: patent RU 208380

Claims

Transfer A final drive for an all-terrain vehicle, comprising a housing with input and output shafts located therein, with a gear transmission including a pinion and a toothed wheel connected to the shafts, characterized in that the housing is made flat with protruding fasteners, equipped with an O-shaped main cover, the housing and cover are made with mounting holes intended for installing shafts and adjusting bearings; the housing contains an axle intended for coaxial installation of the output shaft, the axle is fixedly secured in the housing, the base of the axle is covered by a protrusion made in the housing;the input shaft is made integral with the flange and contains a gear made in the form of a sleeve mounted on the shaft, the gear is fixedly secured to the input shaft and pressed with a nut, the gear rests on two tapered roller bearings, one bearing is mounted in the housing, the other bearing is mounted in the cover, the gear is connected by constant engagement to the toothed wheel for transmitting rotation; the output shaft is made in the form of a sleeve of a transition diameter, equipped with a removable flat round flange that functions as a hub, on one end of which a toothed wheel made in the form of a crown is mounted and fixed with screws, on the other end a flange is fixed with bolts, intended for installing the rim of the wheel, the flange is made flat with holes containing studs; the output shaft is mounted with the possibility of rotation on two tapered roller bearings, one bearing rests on the axle, the second bearing rests on a projection of the housing in which the base of the axle is fixed;the axle is equipped with a through axial channel designed to supply a gas mixture, at the outlet of the channel with the possibility of rotation in the adapter a nipple for pumping up the wheels is installed, the input shaft is made integral with the flange designed for interaction through the cardan drive with the bridge, the output shaft is designed for connection through the flange with the wheel rim; the support bearing of the output shaft, installed on the protrusion of the housing, is located in the same plane with the gear transmission.

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