Bogie wagons

Bogie wagons can be two-axle and three-axle four-axle. Under heavy transporters rolled special multi-axis carriage. Bogie wagons carts differ from passenger cars and the lack of cradle device axlebox suspension, simple design and ease of inspection.

The main type of trucks - two-axle with cast side frames. These include the types of trucks CRI-A3-0, MT-50, UVZ. They have sufficient strength and reliability.

In the 80's Wagon industry produced only a cart CRI-X3-0. Side frame of the truck is made in the form of an entire steel castings, in the middle of which is an opening for the spring group, consisting of dual-core springs and friction wedges, and in the end - the openings for the wheel sets with upper part. Average opening on each side at the top of each side of a guide to which riveted replaceable friction plates are made of heat-treated steel. At the lower inclined belt sidewalls are five cones, which have the form of truncated cones. Depending on the size of the jaws of box openings bumps may be cut down completely, partially or not all be in place. Remaining number specifies the number of cones side frame: all the buds cut down - № 0, there is one bump - N 1, two - N 2, and so on up to N 5. Frame in one truck should be the same number.

Bolster a closed box section is molded together with base, support for placing skolzunov and nests for friction wedges.

When vertical oscillations of the car on the planes of contact friction wedge bolster and friction plate, forces of friction, which dampen the oscillations.

When assembling the carts between bolster and side faces of the guide frame gap is maintained between 2 and 9 mm. This clearance allows the side frames move relative to each other when inscribing the trolley track sections curves. Bolster can be moved in relation to the bogie frames in the transverse direction. These movements are amortized transverse spring constant and the value of their limited tides on the side frames.

Trolley type MT-50 series began in 1952, embarking on a model developed by the Ural Carriage Works. Side frame and bolster truck MT-50 design are similar to those of the trolley CRI-X3-0 (model 18-100). Side frames are loosely linked wheelsets and bolster. The junction bolster Sliding side frames made of cylindrical shape, in order to eliminate the possibility of pinching bolster the case skew frame truck.

Spring group trolleys MT-50 combined, consists of four helical springs and elliptical springs (unlike spring group carts CRI-A3-0, made only of spiral springs). However, the driving performance truck MT-50 is much worse than a typical standard trolley CRI-X3-0.

Trolley type UVZ built between 1936 1952, and the presence of different cross-link (suspension system beams), which was later abolished. In structure trolley UVZ almost similar construction truck MT-50. Differs only in the presence of safety triangles triangelya to keep from falling on the road and the junction with the guide bolster side frames, which has a rectangular shape.

Three-axle truck drove under six-axle gondola cars, but they are not widely received, because it is difficult to design, difficult inspection and replacement pads and has a low driving characteristics. In operation there are basically two types of three-axle bogies: UVZ-9M and UVZ-І0M.

A four by eight-truck drove cars. It consists of two types of two-axle bogies CRI-A3-0, the combined beam coupling, in which the ends at the bottom there are two and two pyatnika skolzuna that it relies on a glide skolzuny bolsters and two-axle bogies.

In the middle of the connecting beams are on top heel which supports for pyatnika car frame and skolzuny supporting the body by the action of the lateral force.