Housing for rear final drive of a snow and marsh vehicle

Abstract

A housing for a rear final drive of a snow and marsh vehicle is made of metal and consists of structural elements that are seamlessly joined to one another, the housing being in the form of a plate containing two apertures (1) and (2) for seating a bearing and mounting an input shaft cover, and for seating the shaft of an output shaft, respectively; in the upper part of the plate there is an arm (10) oriented in a horizontal plane at a right angle to the plate and directed in an outward direction, and on the end of said arm there is a seating aperture (11) for receiving a vertically arranged bushing intended to receive a coupling pin; in the lower part of the plate there are two protruding forks (14), and on the end of the arms (15) of said forks there are coaxial apertures (16) for receiving a coupling pin of a lower arm. The housing is suitable for a final drive of a non-steerable wheel of a snow and marsh vehicle.

Description

REAR DRIVE GEAR HOUSING OF ALL-TERRAIN VEHICLE

[0001] Technical area. This technical solution relates to transport engineering, specifically gearbox engineering. It can be used in the design of the final drive of the non-steering (rear) wheel. It is also suitable for use in the gearbox as an external reduction gear in off-road vehicles such as all-terrain vehicles and all-terrain vehicles.

[0002] High torque and reliability are essential for all-terrain vehicles. However, all-terrain vehicles and snow and swamp vehicles typically have relatively large wheels, so reducing the required torque in the transfer case is insufficient, so final drives are installed on each wheel.

[0003] The gearbox housing is a component that provides mechanical support for the gear train components, allows the gearbox to be secured in place, connects the drive shaft, and transfers torque from the driven shaft. The gearbox housing is the load-bearing element for the moving components. Gearbox housings often contain structural elements that prevent the buildup of pressure within the gearbox, which occurs due to the gearbox heating up during operation.

[0004] Traditionally, it is made from cast iron or aluminum using mold casting methods.

[0005] In industrial practice, gearbox housings for machines are usually produced using the casting method from cast iron, steel, and aluminum alloys.

[0006] The final drives of the uncontrolled wheel of the Soviet wheeled armored personnel carrier BTR-80, BTR-60 [1] are known, containing a housing with a cover, with input and output shafts located in it, with a gear transmission, including a pinion and a gear wheel connected to the shafts.

[0007] The final drive housing [1] is made of metal and consists of smoothly connected structural elements, contains two openings located in the same plane on the vertical axis of symmetry of the plate, the first opening, located in the upper part of the plate, is intended for seating the bearing and installing the input shaft cover; the second opening, located in the lower part of the plate, is intended for seating the output shaft axis; on the inner side, coaxially to the second opening, it contains a cylindrical projection intended for embracing the base of the output shaft axis, on the outer surface of the projection there is a seat for the output shaft support bearing. In the upper part of the housing there is a lever rising above the body of the housing, with an opening oriented in the horizontal plane for placing the connecting axis in a horizontal position, for fastening to the upper arm of the APC suspension.At the bottom of the body there is a similar lever with a hole oriented in a horizontal plane for placing the connecting axis in a horizontal position for attachment to the lower arm of the APC suspension.

[0008] The gearbox [1] and its housing are not suitable for all-terrain vehicles, and the mounting hardware is not suitable for connecting to the vehicle's suspension arms. The housing is bulky, excessively thick, and heavy, and the design complicates repair and adjustment, while the sealed housing does not provide for the release of excess internal pressure.

[0009] A final drive [2] is known, designed to improve the cross-country capability of a vehicle. It comprises a gear transmission with internal engagement and a bracket supporting the vehicle's wheel axis of rotation. The housing is adapted for installation on the vehicle's standard wheel hub with the ability to rotate relative to it and is equipped with means for fastening to vehicle components.

[0010] The housing [2] is not suitable for the closed final drive of the all-terrain vehicle, the fastening elements are not suitable for connection with the suspension arms and placement of the gear transmission.

[0011] To install the gear transmission mechanism and fasten the gearbox at the installation site in the housing, it is necessary to have the appropriate elements with the specified geometry, dimensions, and mutual arrangement corresponding to the installation site.

[0012] The structural elements of known hulls have different shapes and sizes due to differences in the parameters of the gears used and installation locations, but they are not suitable for all-terrain vehicles (for example, the Burlak type).

[0013] The housing of the rear final drive of the all-terrain vehicle is made of metal and consists of smoothly connected structural elements. Moreover, the housing is designed in the form of a plate, the base of which is formed by connected parts in the form of circles of larger and smaller radii with protruding elements located on both sides of the plate; the plate contains two 1 and 2 openings located in the same plane on the vertical axis of symmetry of the plate: the first opening 1, located in the upper part of the plate, is intended for seating the bearing and installing the input shaft cover; the second opening 2, located in the lower part of the plate, is intended for seating the output shaft axle; on the inner side 3, coaxially to the second opening, the plate contains a cylindrical protrusion 6, designed to embrace the base of the output shaft axle 7, on the outer surface of the protrusion there is a seat 8 (75 mm in diameter) for the output shaft support bearing;on the inner side 3 the plate contains two rows of recesses 9 intended for fastening the main cover of the gearbox: the first row of recesses (5 pieces) is located coaxially with the axis of the first hole; the second row of recesses (13 pieces) is located coaxially with the axis of the second hole; the diameter of the circle of the first row of recesses is less than the diameter of the circle of the second row of recesses; on the outer side 4, coaxially with the axis of the first hole, the plate contains a row of recesses intended for fastening the cover of the input shaft; in the upper part of the plate there is a lever 10, oriented in a horizontal plane at a right angle to the plate, directed to the outer side, at the end of the lever there is a mounting hole 11 (with a diameter of 43 mm) for accommodating a bushing located vertically, intended for accommodating the connecting axis; the side surfaces of the lever and the plate are connected by stiffening ribs 13;in the lower part of the plate, symmetrically to the vertical axis of symmetry of the plate, at a right angle to the plate towards the outside, two forks 14 protrude, the arms 15 of the forks are oriented in the vertical plane, at the end of the arms of the forks coaxial holes 16 are made for accommodating the connecting axis of the lower lever, located horizontally, in the plane of the transverse axis of the output shaft and the plane of the transverse axis of the lever hole; on the outer side of the plate in the area around the first and second holes a thickening 17 is made in the form of circles, united by a jumper 18 with straight sides, smoothly connected to the base of the forks, with stiffening ribs 13 of the lever 10 and connected by a vertical stiffening rib 19 with a thickening 20, located along the perimeter of the lower part of the plate; the transitions and conjugations of the elements are made smooth with roundings.

[0014] Ensures that the gearbox housing matches the installation location for connection to the suspension arms of the all-terrain vehicle's non-steering wheel, for mounting gear transmission elements with a gear ratio of 3.8, a maximum permissible torque of 3000 Nm, with a sufficient level of reliability and strength.

[0015] The technical task is to improve the design of the final drive housing of the unsteered wheel for an all-terrain vehicle, in order to ensure the possibility of placing bearing supports for the input and output shaft of the gear transmission, fixing the main cover of the gearbox, the input shaft cover, movable fastening of the gearbox housing in a given position to the suspension arms of the all-terrain vehicle, while ensuring reliability and the ability of the part to withstand mechanical loads.

[0016] The problem is solved by using a metal housing for the all-terrain vehicle's rear final drive, consisting of seamlessly interconnected structural elements. The housing is designed as a plate, the base of which is formed by mating parts shaped like circles of larger and smaller radii, with protruding elements located on either side of the plate. The plate contains two openings located in the same plane on the plate's vertical axis of symmetry:

[0017] the first hole, located in the upper part of the plate, is intended for seating the bearing and installing the input shaft cover;

[0018] the second hole, located in the lower part of the plate, is intended for mounting the output shaft axis;

[0019] on the inside, coaxially to the second hole, the plate contains a cylindrical protrusion designed to cover the base of the output shaft axis; on the outer surface of the protrusion there is a seat (75 mm in diameter) for the output shaft support bearing;

[0020] On the inside, the plate contains two rows of recesses intended for fastening the main cover of the gearbox:

[0021] the first row of recesses (5 pieces) is located coaxially to the axis of the first hole;

[0022] the second row of recesses (13 pieces) is located coaxially to the axis of the second hole;

[0023] the diameter of the circumference of the first row of recesses (136 mm) is less than the diameter (276 mm) of the circumference of the second row of recesses;

[0024] on the outside, coaxially to the axis of the first hole, the plate contains a number of recesses (8 pieces) intended for fastening the input shaft cover;

[0025] in the upper part of the plate there is a lever, oriented in a horizontal plane at a right angle to the plate, directed towards the outside, at the end of the lever there is a mounting hole (43 mm in diameter) for placing a bushing located vertically, intended for placing a connecting axis; the side surfaces of the lever and the plate are connected by stiffening ribs;

[0026] in the lower part of the plate, symmetrically from the vertical axis of symmetry of the plate, at a right angle to the plate towards the outside, two forks protrude, the arms of the forks are oriented in a vertical plane, at the end of the arms of the forks there are coaxial holes for accommodating the connecting axis of the lower lever, located horizontally, in the plane of the transverse axis of the output shaft and the plane of the transverse axis of the lever hole;

[0027] on the outer side of the plate, in the area around the first and second holes, a thickening is made in the form of circles connected by a jumper with straight sides, smoothly connected to the base of the forks, with the stiffening ribs of the lever, and connected by a vertical stiffening rib with a thickening located along the perimeter of the lower part of the plate;

[0028] transitions and connections of elements are made smooth with roundings.

[0029] The result consists in expanding the arsenal of technical means to ensure that the gearbox housing matches the installation location for connecting to the suspension arms of the non-steering wheel of the all-terrain vehicle, for mounting gear transmission elements with a gear ratio of 3.8, a maximum permissible torque of 3000 Nm, with a sufficient level of reliability and durability.

[0030] The advantages over similar products include the ability to use a gear reducer with a gear ratio of 3.8 and a maximum permissible torque of 3000 Nm on an all-terrain vehicle, while ensuring sufficient reliability and durability.

[0031] The above set of features allows us to solve the stated problem and ensures the stated technical result.

[0032] The technical solution eliminates the described problems inherent in existing analogs. The design simplifies manufacturing, simplifies gearbox assembly and disassembly, and improves overall reliability, operational, and technological performance.

[0033] The technical solution can be implemented in various modifications (variants), the solution is explained by a description and diagrams showing: Figure 1

[0034] General view of the body, from the inside. Figure 2

[0035] General view, from the outside. Figure 3

[0036] Assembled body, in section. Figure 4

[0037] Complete body, front view. Figure 5

[0038] Rear final drive, sectional view.

[0039] The housing of the rear final drive of the all-terrain vehicle is made of metal and consists of smoothly connected structural elements. Moreover, the housing is designed as a plate, the base of which is formed by connected parts in the form of circles of larger and smaller radii with protruding elements located on both sides of the plate; the plate contains two openings 1 and 2 located in the same plane on the vertical axis of symmetry of the plate: the first opening 1, located in the upper part of the plate, is intended for seating the bearing and installing the input shaft cover; the second opening 2, located in the lower part of the plate, is intended for seating the output shaft axle; on the inner side 3, coaxially to the second opening, the plate contains a cylindrical protrusion 6, designed to embrace the base of the output shaft axle 7, on the outer surface of the protrusion there is a seat 8 (75 mm in diameter) for the output shaft support bearing;on the inner side 3 the plate contains two rows of recesses 9 intended for fastening the main cover of the gearbox: the first row of recesses (5 pieces) is located coaxially with the axis of the first hole; the second row of recesses (13 pieces) is located coaxially with the axis of the second hole; the diameter of the circle of the first row of recesses is less than the diameter of the circle of the second row of recesses; on the outer side 4, coaxially with the axis of the first hole, the plate contains a row of recesses intended for fastening the cover of the input shaft; in the upper part of the plate there is a lever 10, oriented in a horizontal plane at a right angle to the plate, directed to the outer side, at the end of the lever there is a mounting hole 11 (with a diameter of 43 mm) for accommodating a bushing located vertically, intended for accommodating the connecting axis; the side surfaces of the lever and the plate are connected by stiffening ribs 13;in the lower part of the plate, symmetrically to the vertical axis of symmetry of the plate, at a right angle to the plate towards the outside, two forks 14 protrude, the arms 15 of the forks are oriented in the vertical plane, at the end of the arms of the forks coaxial holes 16 are made for accommodating the connecting axis of the lower lever, located horizontally, in the plane of the transverse axis of the output shaft and the plane of the transverse axis of the lever hole; on the outer side of the plate in the area around the first and second holes a thickening 17 is made in the form of circles connected by a jumper 18 with straight sides, smoothly connected to the base of the forks, with stiffening ribs 13 of the lever 10 and connected by a vertical stiffening rib 19 with a thickening 20 located along the perimeter of the lower part of the plate; the transitions and conjugations of the elements are made smooth with roundings.

[0040] The all-terrain vehicle's rear final drive housing is made of cast 35KhNL steel (casting hardness 241...301 HB). The housing consists of seamlessly interconnected structural elements. The housing is designed as a plate, the base of which is formed by mating parts shaped like circles of larger and smaller radii, with protruding elements located on either side of the plate.

[0041] The plate contains two openings 1 and 2, located in the same plane on the vertical axis of symmetry of the plate:

[0042] the first hole 1, located in the upper part of the plate, is intended for seating the bearing and installing the input shaft cover, the diameter of the first hole is 90 mm (the dimensions here and below are indicated taking into account the inevitable permissible deviations, for example, the specified size of 90 mm has a maximum deviation of size according to H7 (tolerance) + 0.035 mm);

[0043] the second hole 2, located in the lower part of the plate, is intended for mounting the output shaft axis, the diameter of the second hole is 55 mm;

[0044] The center distance between the first and second holes is 145 mm.

[0045] The plate has an inner side (3) and an outer side (4). The inner side (3) is closed by the main cover (5) of the gearbox and, together with it, forms a closed internal cavity of the gearbox, which contains a gear transmission filled with lubricant (oil).

[0046] On the inner side 3, coaxial with the second opening 2, the plate contains a cylindrical projection 6 designed to enclose the base of the output shaft axis 7. On the outer surface of the projection 6, a seat 8, 75 mm in diameter, is formed for the output shaft support bearing. The straight-line distance from the outer surface 4 of the plate to the end of the cylindrical projection 6 is 95 mm.

[0047] Axle 7 is installed into bore 2 and projection 6, with an interference fit. Before installation, axis 7 is cooled in liquid nitrogen and installed until it rests against the housing; no gap is allowed between the axle flange and the housing. Axle 7 is connected to the housing with a weld.

[0048] On the inner side 3, the plate contains two rows of recesses 9, intended for fastening the main cover 5 of the gearbox:

[0049] the first row of recesses 9 in the amount of 5 pieces is located coaxially to the axis of the first hole 1;

[0050] the second row of recesses 9 in the amount of 13 pieces is located coaxially to the axis of the second hole 2;

[0051] The diameter of the circle of the first row of recesses is 136 mm, the diameter of the circle of the second row of recesses is 276 mm.

[0052] On the outer side 4, coaxially to the axis of the first opening 1, the plate contains a number of recesses 9 intended for fastening the input shaft cover.

[0053] Lever 10 is located at the top of the plate, oriented horizontally at a right angle to the plate and directed toward the outside of the plate 4. A mounting hole 11, 43 mm in diameter, is made at the end of lever 10 to accommodate a vertically positioned bushing 12. Bushing 12 is designed to accommodate the connecting axle of the upper suspension arm of the all-terrain vehicle and to secure the gearbox to the body / frame. Bushing 12 is installed in hole 11 with an interference fit. Before installation, bushing 12 and the conical washer are cooled in liquid nitrogen. Install until it rests against lever 10; no gap is allowed between the flanges of the components and the body.

[0054] The side surfaces of lever 10 and the plate are connected by stiffening ribs 13. The straight-line distance from the inner surface of the plate to the axis of the mounting hole 11 of lever 10 is 150 mm. The straight-line distance from the outer surface of lever 10 to the axis of the first hole 1 is 140 mm.

[0055] At the bottom of the plate, symmetrically about the plate's vertical axis of symmetry, at a right angle to the plate's outer side (4), two forks (14) protrude. The arms (15) of the forks (14) are oriented in the vertical plane. The thickness of the arms (15) is 15 mm, and the height of the forks (14) at the base is 80 mm. The forks (14) are designed to accommodate the connecting axle of the all-terrain vehicle's lower suspension arm and to attach the gearbox to the body / frame.

[0056] At the end of the arms 15 of the forks 14, coaxial holes 16 are formed to accommodate the connecting axis of the lower suspension arm. The connecting axis is located horizontally, in the plane of the transverse axis 7 of the output shaft and the plane of the transverse axis of the hole 11 of the arm 10. The straight-line distance from the outer surface of the plate to the axis of the holes 16 of the forks 14 is 54 mm.

[0057] On the outer side of the plate 4, in the area around the first 1 and second 2 openings, a thickening 17 is formed in the form of circles connected by a bridge 18 with straight sides, smoothly connected to the base of the forks 14, with stiffening ribs 13 of the lever 10, and connected by a vertical stiffening rib 19 to thickening 20, located along the perimeter of the lower part of the plate. The transitions and joints of the elements are made smooth with roundings. The thickness of thickening 17 of the plate is equal to the thickness of lever 10 and is 30 mm. The thickness of thickening 19 located along the perimeter of the lower part of the plate is 10 mm. The thickness of stiffening ribs 13 and 19 is 10 mm.

[0058] Description of use.

[0059] The rear final drive housing of the all-terrain vehicle provides mechanical support for the gear components of the gearbox with one moving axis (drive input shaft) and one fixed axis (driven output shaft), mechanical protection for the internal components and a sealed container (in combination with the main cover) for the grease that lubricates these gear components.

[0060] The housing of the rear final drive of the all-terrain vehicle allows the gearbox to be attached to the body / frame of the vehicle using suspension arms, which is necessary for connecting the drive shaft and installing the non-steering wheel on the gearbox hub to remove torque from the driven shaft.

[0061] Housing 21 is a supporting part of the rear final drive of the all-terrain vehicle (type "Burlak"), designed to transmit rotation to the unsteered wheel of the all-terrain vehicle.

[0062] For intended use, the axis 7 of the output shaft 24 is fitted with tension into the second opening 2 of the housing 21, located in the lower part of the plate.

[0063] Bushing 12 is installed with tension into mounting hole 11 of lever 10. Bushing 12 allows the connecting axis of the upper suspension arm of the all-terrain vehicle to be placed in a vertical position and provides a movable connection for attaching the gearbox to the body / frame of the all-terrain vehicle.

[0064] In the housing 21, there are support bearings 27, 28 of the input shaft 23 and the output shaft 24 of the gear transmission, including the pinion 25 and the gear wheel 26.

[0065] A bearing 27 with an outer diameter of 90 mm of the input shaft 23 is installed in the first hole 1, located in the upper part of the plate. The second bearing 27 of the input shaft 23 is installed in the main cover 5.

[0066] A bearing 28 with an internal diameter of 75 mm of the output shaft 24 is installed on the cylindrical projection 6 in the area of ​​the seat 8. A second bearing 28 of the output shaft 24 is installed on the axis 7. The cylindrical projection 6 covers the axis 7 by a length of 95 mm, which ensures a strong fixation of the axis 7 and sufficient reliability in transmitting rotation, axial and radial loads.

[0067] Output shaft 24 with gear wheel 26 is mounted on bearings 28. The axis of gear 25 of input shaft 23 is mounted on bearings 27. The center distance between the first 1 and second 2 holes ensures the installation of a gear transmission (gear 25 and gear wheel 26) with a gear ratio of 3.8, maximum permissible torque of 3000 Nm.

[0068] The main cover 5 (made of a figured shape formed by mating parts in the form of circles of a larger and smaller radius) is attached to the housing 21 from the inner side 3, fixing it with bolts 30, placed in two rows of recesses 9, the first row of recesses 9, in the amount of 5 pieces, the second row of recesses 9, in the amount of 13 pieces, provide a strong fixation and a hermetic connection of the cover 5 with the housing 21. The recesses 9 of the first row and the second row, made along the circumference, with bolts 30, provide a distribution of the load over the area of ​​the plate, when transmitting mechanical forces from the side of the cover 5 to the housing 21.

[0069] Bearing 27 of input shaft 23 is covered on the outer side 4 by cover 29, which rests against bearing 27 with eight bolts 31. Cover 29 is secured by screwing them into recesses 9. Recesses 9 ensure a tight fit of the cover and bearing. Input shaft 23 passes through cover 29 using sealing cuffs.

[0070] After assembly, the final drive is filled with lubricant. On the housing, on the inner side 3, in the upper part of the plate, there is a radial cavity (groove) connected to a through hole containing a breather valve, which prevents excessive pressure buildup inside the gearbox caused by heat buildup during operation.

[0071] Wheel hub 22 is attached to the free end of output shaft 24, transmitting torque from input shaft 23 via a gear transmission. Wheel hub 22 also transmits multidirectional loads from the wheel of the all-terrain vehicle to body 21.

[0072] The housing allows for mounting the final drive at the intended location. The final drive is secured to the upper and lower suspension arms of the all-terrain vehicle using lever 10 and forks 14 of the housing.

[0073] The lower suspension arm bushings are positioned between the arms 15 of the forks 14 of the housing, and the lower suspension arm connecting shaft is installed in the coaxial holes 16. The connecting shaft is positioned horizontally in the plane of the transverse axis 7 of the output shaft and the plane of the transverse axis of the hole 11 of the arm 10. The straight distance from the outer surface of the plate to the axis of the holes 16 of the forks 14 allows the lower suspension arm to be attached.

[0074] Lever 10 in the upper part of the body connects to the all-terrain vehicle's upper suspension arm. The connecting shaft of the all-terrain vehicle's upper suspension arm is placed in bushing 12, located in opening 11, to secure the gearbox to the body / frame. Lever 10 is L-shaped, oriented horizontally at a right angle to plate 4, pointing outward, allowing it to be installed in the desired position and connected to the upper suspension arm.

[0075] Lever 10 and forks 14 provide the ability to mount the gearbox housing to the all-terrain vehicle, connect to the suspension components, and transmit power, supporting the weight of the all-terrain vehicle and the impact load from the wheel. The thickness of the lever, arms, and fork height ensure the necessary strength and reliability for attaching the gearbox to the vehicle's body / frame.

[0076] Stiffening ribs 13 and thickening 17, in the form of circles connected by a straight-sided crossbar 18, smoothly connected to the base of the forks 14, with stiffening ribs 13 of lever 10, and connected by a vertical stiffening rib 19 to thickening 20 located along the perimeter of the lower part of the plate, provide mechanical strength to the housing and enable it to withstand bending, tensile, compressive, and impact loads. The transitions and joints of the elements are smooth and rounded, reducing localized mechanical stress concentration and the risk of cracking. The ratio of the dimensions of the housing elements allows for the installation of a final drive on the all-terrain vehicle and attachment to the hub of the non-steerable wheel.

[0077] The axis 7 is fixedly secured in the housing 21, and its base is covered by the housing material along its length until it stops at the flange, which makes it possible to withstand mechanical loads.

[0078] Input shaft 23 is made integral with a flange designed for interaction with the axle via a cardan drive.

[0079] The support bearing 28 of the output shaft 24, installed on the seat 8 of the projection 6 of the housing, is located in the same plane as the gear transmission, which allows for the optimal distribution of loads on the housing and shafts.

[0080] 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.

[0081] The proposed rear final drive housing expands the range of gear housings available for wheeled all-terrain vehicles. It allows for the installation of a gear transmission with a 3.8-speed reduction and a torque of up to 3000 Nm to drive the vehicle's non-steering (rear) wheel. This allows the vehicle to rotate at a maximum speed of 80 km / h, even with a vehicle weighing 4 tons. Testing has demonstrated the reliability of the gear housing and its ability to withstand multidirectional loads thanks to its design.

[0082] The advantages over similar products include the ability to use a gear reducer with a gear ratio of 3.8 and a maximum permissible torque of 3000 Nm on an all-terrain vehicle, while ensuring sufficient reliability and durability.

[0083] Manufactured using commercially available components and materials, its components can be manufactured and assembled both in a home-based manner and at modern industrial facilities. It is primarily intended for use in off-road vehicles, heavy-duty amphibious all-terrain vehicles, arctic all-terrain vehicles, and snow and swamp vehicles.

[0084] first hole (designed to seat the bearing and install the input shaft cover);second hole (designed to seat the output shaft axle);inner side of the plate;outer side of the plate;gearbox cover;protrusion;output shaft axle;mounting seat;recess (designed to fasten the main gearbox cover);lever (designed to connect to the upper arm of the all-terrain vehicle suspension, to fasten the gearbox to the body / frame);hole;bushing;stiffener;fork (designed to connect to the lower arm of the all-terrain vehicle suspension, to fasten the gearbox to the body / frame);shoulder;hole;thickening;bridge;stiffener;thickening;wheel hub housing;input shaft;output shaft;gear;toothed wheel;bearing;bearing;cover;bolt;bolt.

[0085] Source 1: BTR-80 wheel gearbox https: / / triptonkosti.ru / 25-foto / kolesnyj-reduktor-btr-80-shema.html.

[0086] patent RU 179573.

Claims

The housing of the rear final drive of the all-terrain vehicle, made of metal, consisting of smoothly connected structural elements, characterized in that it is made in the form of a plate, the base of which is formed by connected parts in the form of circles of a larger and smaller radius, with protruding elements located on both sides of the plate; the plate contains two openings located in the same plane on the vertical axis of symmetry of the plate: the first opening, located in the upper part of the plate, is intended for seating the bearing and installing the input shaft cover; the second opening, located in the lower part of the plate, is intended for seating the output shaft axis; on the inner side, coaxially to the second opening, the plate contains a cylindrical protrusion intended to embrace the base of the output shaft axis, on the outer surface of the protrusion there is a seat with a diameter of 75 mm for the output shaft support bearing;On the inside, the plate contains two rows of recesses intended for fastening the main cover of the gearbox: the first row of recesses, 5 in number, is located coaxially with the axis of the first hole; the second row of recesses, 13 in number, is located coaxially with the axis of the second hole; the diameter of the circle of the first row of recesses, 136 mm, is less than the diameter of 276 mm of the circle of the second row of recesses; on the outside, coaxially with the axis of the first hole, the plate contains a row of recesses, 8 in number, intended for fastening the cover of the input shaft; in the upper part of the plate there is a lever oriented in a horizontal plane at a right angle to the plate, directed outward, at the end of the lever there is a mounting hole with a diameter of 43 mm for accommodating a bushing located vertically, intended for accommodating the connecting axis; the side surfaces of the lever and the plate are connected by stiffening ribs;in the lower part of the plate, symmetrically to the vertical axis of symmetry of the plate, at a right angle to the plate towards the outside, two forks protrude, the arms of the forks are oriented in the vertical plane, at the end of the arms of the forks coaxial holes are made for accommodating the connecting axis of the lower lever, located horizontally, in the plane of the transverse axis of the output shaft and the plane of the transverse axis of the lever hole; on the outer side of the plate in the area around the first and second holes a thickening in the form of circles is made, united by a jumper with straight sides, smoothly connected to the base of the forks, with the stiffening ribs of the lever and connected by a vertical stiffening rib with a thickening located along the perimeter of the lower part of the plate; the transitions and connections of the elements are made smooth with roundings. The housing of the rear final drive of the all-terrain vehicle according to paragraph 1, characterized in that it is made of cast steel 35KhNL, and taking into account the inevitable permissible deviations, the thickness of the plate thickening is equal to the thickness of the lever and is 30 mm, the thickness of the fork arms is 15 mm, the height of the forks at the base is 80 mm, the thickness of the thickening located along the perimeter of the lower part of the plate is 10 mm, the thickness of the stiffening ribs is 10 mm. The housing of the rear final drive of the all-terrain vehicle according to paragraph 1, characterized in that, taking into account the inevitable permissible deviations, the center-to-center distance between the first and second openings is 145 mm, the straight-line distance from the inner surface of the plate to the axis of the mounting opening of the lever is 150 mm, the straight-line distance from the outer surface of the lever to the axis of the first opening is 140 mm, the straight-line distance from the outer surface of the plate of the end of the cylindrical projection is 95 mm, the straight-line distance from the outer surface of the plate to the axis of the openings of the forks is 54 mm, the diameter of the first opening is 90 mm, the diameter of the second opening is 55 mm.

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