Track roller of a tracked vehicle

Abstract

This utility model pertains to transport engineering, specifically to the design of tracked vehicle road wheels. The road wheel comprises a hub, a disc secured to the hub, and a shell covered with a tire, attached to the outer end of the disc. According to the utility model, the hub is made of cylindrical rolled steel grade 45 in accordance with GOST 1050-74 or steel grade 09G2S in accordance with GOST 19281-2014, while the disc, shell, and reinforcing plates are made of sheet steel of the specified grades. Reinforcing steel plates are attached to the side surface of the disc, located radially relative to the hub axis. In certain embodiments, the disc has openings, the roller elements are connected by welds, and the outer surfaces can be coated with a protective layer of rubber. Allows for increased strength and rigidity of the track roller, improved resistance to impact loads, reduced metal consumption, and improved maintainability. 8 references, 7 figs.

Description

[0001] Technical field

[0002] The claimed utility model relates to the field of transport engineering, namely to the designs of track rollers of tracked vehicles, and can be used in all-terrain vehicles, tractors, snowmobiles and other tracked vehicles operated in difficult road and climatic conditions, and more specifically in the design of the track rollers of the Russian all-terrain vehicle GAZ-3351 "Los" - a licensed modification of the Swedish Hagglunds Bv206, which are currently actively used by geologists, rescuers, and oil workers.

[0003] Technology Level

[0004] The prior art includes various designs of track rollers for tracked vehicles, designed to support the load from the weight of the vehicle and transfer it to the track, as well as to guide the movement of the track.

[0005] A track roller for a tracked vehicle is known according to the USSR Author's Certificate No. 1117247 (published 10 / 07 / 1984), comprising an aluminum rim with a cylindrical outer surface, a steel flange pressed against the side surface of the rim and secured to it, and a rubber tire vulcanized onto the outer surfaces of the rim and flange.

[0006] The disadvantage of this alternative is the roller's lack of reliability under heavy loads. The flange in this design does not extend beyond the outer surface of the rim, which, when interacting with the side surfaces of the track links, leads to destruction of the rubber tire. Furthermore, the use of an aluminum rim limits the roller's strength and its ability to withstand significant impact loads.

[0007] A sprung support roller is known, according to USSR Author's Certificate No. 1699850 (published December 30, 1991), comprising a balance beam with a bushing and rims with raceways, mounted on both sides of the balance beam using bearings. A disc is detachably attached to each end of the bushing, with its inner surface interacting with the end of the rim, and its outer surface interacting with a cover, detachably attached to each rim.

[0008] The disadvantage of this roller is its complex design and the large number of components, which reduces its reliability and maintainability. This design is intended to ensure independent rotation of the rims, but does not improve the strength of the roller itself as a single unit.

[0009] A tracked vehicle road wheel is known, according to USSR Author's Certificate No. 1344677 (published October 15, 1987), comprising a rim with grooves on the inner surface, a hub, and discs located in the rim grooves. Reinforcing rings are welded to the discs and hub.

[0010] This solution is aimed at increasing the strength and load-bearing capacity of the roller, however, the presence of grooves on the inner surface of the rim and additional reinforcing rings complicates the design and increases the metal content of the product.

[0011] A support roller is also known under Russian Patent No. 2225311 (published March 10, 2004), comprising a rim with grooves on the inner surface, a hub, and discs welded to the rim and hub. The inner wall of the grooves is formed by a bent ring welded to the rim. The welds connecting the disc to the rim and hub are reinforced by rings welded to the disc.

[0012] The disadvantage of this technical solution is the complexity of the manufacturing process, due to the need to create grooves on the inner surface of the rim and install additional reinforcing rings for the welds. This increases the labor intensity of production and the cost of the roller.

[0013] The disadvantage of this analogue is that the patent is aimed at the general layout of the tracked drive and does not disclose the specific design features of the support roller, aimed at increasing its strength and reducing metal consumption.

[0014] A track roller is known according to Chinese patent CN201258033Y (published on June 17, 2009), which contains a roller body with a bulge in the middle for interaction with the track, while the side surfaces are made arched to ensure operation on uneven ground.

[0015] The disadvantage of this analogue is that the design is aimed primarily at adapting to the terrain and does not contain disc reinforcement elements, such as additional steel plates, which limits the strength characteristics of the roller under high loads.

[0016] The closest analogue (prototype) to the claimed utility model is a tracked vehicle road wheel according to Russian Patent No. 2225311 (published March 10, 2004), comprising a hub, a disc secured to the hub, a rim, and a shell attached to the disc along its outer end, covered with a bandage tire. The rim is grooved on the inner surface, with the inner wall of the grooves formed by a ring welded to the rim and made of bent rolled metal. The welds joining the disc to the rim and the hub are reinforced by rings welded to the disc.

[0017] A disadvantage of the prototype is the complexity of the manufacturing technology, due to the need to create grooves on the inner surface of the rim and install additional reinforcing rings for the welds. This increases the labor intensity of production and the cost of the roller.

[0018] The common features of the prototype with the claimed utility model are the presence of a hub, a disk fixed to the hub, a shell attached to the outer end of the disk, and a bandage tire covering the shell.

[0019] The disadvantages of the prototype are:

[0020] - increased metal content and weight of the roller due to the use of reinforcing rings welded around the entire circumference of the disc;

[0021] - impossibility of local strengthening of the most loaded areas of the disk;

[0022] - low maintainability, since if the reinforcing ring is damaged, the entire unit must be replaced;

[0023] - the complexity of the manufacturing technology, due to the need to create grooves on the inner surface of the rim.

[0024] The technical objective addressed by the claimed utility model is to create a tracked vehicle road wheel with increased strength and impact resistance, improved field maintainability, and an extended service life, all while maintaining manufacturing efficiency and an acceptable weight. An additional objective is to enable localized reinforcement of the wheel in the most heavily loaded areas without excessively increasing the metal content, as well as to improve the corrosion and wear resistance of the road wheel's outer surfaces.

[0025] Disclosure of the essence of the utility model

[0026] The stated problem is solved in that the support roller of a tracked vehicle, containing a hub, a disk fixed to the hub, a shell attached to the disk along its outer end, covered with a bandage tire, is characterized in that the hub, disk and shell are made of high-strength steel, while reinforcing steel plates are attached to the side surface of the disk, located radially relative to the axis of the hub.

[0027] In particular cases of implementation, the utility model is characterized by the following features.

[0028] The disc, shell, and reinforcing steel plates can be made of 4mm thick sheet steel grade 45 according to GOST 1050-74 or 09G2S steel according to GOST 19281-2014. The hub can be made of cylindrical rolled products of the same materials.

[0029] The roller can be made with an outer diameter from 365mm to 400mm.

[0030] The disc can be made with an outer diameter of 330mm and an inner diameter of 60mm.

[0031] The bandage splint can have an outer diameter width of 32-38 mm and an inner diameter width of 38-46 mm.

[0032] The disc may have through holes arranged in an arc or oblique line from the outer edge to the center.

[0033] The hub, disc and shell can be connected to each other by welding.

[0034] The outer surfaces of the roller can be covered with a protective layer of rubber or rubber.

[0035] The protective layer can be made of divinyl or styrene rubber with a Shore A hardness of 55-65.

[0036] The technical result achieved by implementing the claimed utility model is:

[0037] - increasing the strength and rigidity of the support roller by making the hub, disc and shell from high-strength steel and additionally reinforcing the disc with radially located steel plates;

[0038] - improved maintainability due to the ability to replace individual reinforcing plates without dismantling the entire unit;

[0039] - increasing the service life due to the use of high-quality materials for the bandage tire and protective layer;

[0040] - reduction of metal consumption compared to ring reinforcement due to local rather than continuous reinforcement of the disk.

[0041] Brief description of drawings.

[0042] The drawings show embodiments of the utility model, with identical elements designated by identical reference numbers:

[0043] 1 - track roller hub;

[0044] 2 - support roller disc;

[0045] 3 - shell;

[0046] 4 - bandage splint;

[0047] 5 - reinforcing plate;

[0048] 6 - ​​through holes (6) of the disk (2).

[0049] Fig. 1 shows a general axonometric view of the support roller;

[0050] Fig. 2 shows a general axonometric view of the disk without a coating with a sectoral cutout.

[0051] Fig. 3 shows a general axonometric view of the hub (1) without a coating with a cutout.

[0052] In Fig. 4 - disk (2) of the support roller.

[0053] Fig. 5 - reinforcing plate (5), front and side view.

[0054] Fig. 6 - hub (1) of the support roller, front view with a vertical section.

[0055] In Fig. 7 - shell plate (3).

[0056] Implementation of a utility model

[0057] The tracked vehicle support roller (Fig. 1) comprises a hub (1) configured to be mounted on the vehicle suspension axle. A disc (2) is secured to the hub (1) and may be made solid or composite. A shell (3) is attached to the outer end of the disc (2) and has a pressed or vulcanized bandage tire (4) made of an elastic material designed to interact with the track. The hub (1), disc (2) and shell (3) are made of high-strength steel, for example, grade 45 sheet steel according to GOST 1050-74 or grade 09G2S steel according to GOST 19281-2014 with a thickness of 4 mm. The choice of these materials is due to their high strength, impact toughness and processability during welding and mechanical processing, which is especially important for operation under conditions of low temperatures and high impact loads.

[0058] Unlike known solutions, the claimed design features reinforcing steel plates (5) attached to the side surface of the disc (2), positioned radially relative to the axis of the hub (1) (Fig. 2). The plates (5) can be welded to the disc (2) or secured in some other manner to ensure a rigid connection.

[0059] The radial arrangement of the plates (5) allows:

[0060] - locally strengthen the most loaded areas of the disc (2), which bear maximum bending and impact loads when driving over rough terrain;

[0061] - reduce the metal consumption of the structure compared to the ring reinforcement used in the prototype;

[0062] - improve the repairability of the roller: if a separate plate (5) is damaged, it can be replaced without dismantling the entire unit and without replacing the disk (2).

[0063] In particular cases of implementation of the utility model:

[0064] - The roller can be made with an outer diameter from 365 mm to 400 mm, which corresponds to the standard sizes of road wheels for articulated all-terrain vehicles.

[0065] - The disc (2) can have an outer diameter of 330mm and an inner diameter of 60mm, which provides an optimal strength-to-weight ratio.

[0066] - The bandage tire (4) can have an outer diameter width of 32-38 mm and an inner diameter width of 38-46 mm, which ensures uniform distribution of the load on the track.

[0067] - The disc (2) may be provided with through holes (6) arranged in an arc or at an angle from the outer edge to the center. These holes serve to reduce the weight of the roller and also to drain dirt and moisture.

[0068] - The hub (1), disc (2) and shell (3) can be connected to each other by welded seams, which ensures the solidity and rigidity of the structure.

[0069] - The outer surfaces of the roller (hub (1), disc (2), shell (3), reinforcing plates (5)) can be covered with a protective layer (7) of rubber. This coating protects the metal from corrosion and abrasive wear and improves the rink's cleanability from dirt and snow.

[0070] - The protective layer (7) can be made of divinyl or styrene rubber with a Shore A hardness of 55-65, which provides an optimal combination of elasticity and wear resistance at low temperatures.

[0071] The track roller is manufactured as follows.

[0072] The hub (1), disc (2), shell (3), and reinforcing plates (5) are cut from 4mm thick high-strength steel sheet (e.g., 09G2S or steel 45). The blanks are stamped or machined to achieve the required shape.

[0073] The disc (2) can be made from two stamped halves welded together to form an internal cavity, which increases the rigidity of the structure while maintaining moderate weight.

[0074] The hub (1), disc (2), and shell (3) are connected by welding. Reinforcing steel plates (5) are welded to the side surface of the disc (2) in a radial direction relative to the axis of the hub (1).

[0075] A bandage tire (4) made of elastic material is pressed or vulcanized onto the shell (3).

[0076] If necessary, a protective layer (7) of rubber is applied to the outer surfaces of the roller, for example, by spraying or dipping. To ensure the required hardness (55-65 Shore A), the protective layer is made of divinyl or styrene rubber with appropriate vulcanizing additives.

[0077] The device operates as follows.

[0078] When a tracked vehicle is moving, the load from the vehicle's weight is transmitted through the suspension to the hub (1), then to the disc (2) and the track collar (3), and then through the tire (4) to the track. The tire (4) dampens shock loads and ensures uniform contact with the track.

[0079] Reinforcing plates (5), located radially, absorb bending and torsional moments that arise in the disc (2) when moving on an uneven surface, and redistribute the load on the hub (1), preventing deformation and destruction of the disc (2).

[0080] When used in low temperatures and aggressive environments, the protective layer (7) protects the metal parts of the roller from corrosion and abrasive wear, and also prevents snow and dirt from sticking.

[0081] If one of the reinforcing plates (5) is damaged (for example, when hitting a stone), it can be replaced in a repair shop without dismantling the entire roller and without replacing the disc (2), which significantly increases the maintainability of the product.

[0082] Thus, when implementing the claimed utility model, the declared technical result is achieved:

[0083] - increasing the strength and rigidity of the support roller;

[0084] -improved maintainability;

[0085] - increase in service life;

[0086] - reduction of metal consumption.

[0087] The design of the support roller has been tested and has shown positive results during bench and operational tests.

Claims

1. A track roller of a tracked vehicle comprising a hub, a disk secured to the hub, a shell attached to the disk along its outer end, covered with a bandage tire, characterized in that the hub, disk and shell are made of high-strength steel, while reinforcing steel plates are attached to the side surface of the disk, located radially relative to the axis of the hub.

2. A support roller according to paragraph 1, characterized in that the disk, shell and reinforcing steel plates are made of sheet steel 45 or steel 09G2S with a thickness of 4 mm, and the hub is made of cylindrical rolled stock from the same materials.

3. A support roller according to paragraph 1, characterized in that the roller is made with an external diameter of 365 - 400 mm.

4. A support roller according to paragraph 1, characterized in that the disk is made with an outer diameter of 330 mm and an inner diameter of 60 mm.

5. A support roller according to paragraph 1, characterized in that the bandage tire has an outer diameter width of 32-38 mm and an inner diameter width of 38-46 mm.

6. A support roller according to paragraph 1, characterized in that the disk has through holes located along an arc or an inclined line from the outer edge to the center.

7. A support roller according to paragraph 1, characterized in that the hub, disk and shell, and reinforcing plates are connected to each other by a welded seam.

8. A support roller according to claim 1, characterized in that the outer surfaces of the roller are covered with a protective layer of rubber.

9. A support roller according to item 8, characterized in that the protective layer is made of divinyl or styrene rubber with a Shore A hardness of 55-65.

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