RU65503U1 - BRIDGE MECHANICAL COMPLEX - Google Patents

Abstract

The utility model relates to military engineering, and specifically to mechanized complexes consisting of collapsible bridge structures, bridge assembly machines for assembling and laying bridge structures on an obstacle, and transporters for transportation of bridge structure elements. New is that the bridge assembly machine is equipped with a counterweight installation device, which includes support plates laid on the ground and connected by a transverse connection, and height-adjustable screw ties made with the help of quick-release axles and eyelets with support plates and with the ability to install, for example, through rings on the front towing hooks of the chassis frame, while one of the carriers is used as a counterweight by mounting wheels on base plates with the longitudinal stability of the bridge assembly machine against tipping over during assembly and laying of the aiming beam on the obstacle, the length of the transverse connection being selected in accordance with the distance between the axles of the front pairs of wheels of the chassis of the transporters. A device for moving bridge blocks of a span along a pickup beam includes a block removably mounted on the extendable end of the pickup beam, and a cable whose ends are connected to the traction winch and through this block with a movable bridge block. The complex is equipped with a mounting kit, and the bridge blocks are equipped with built-in mechanisms for interconnecting. The technical result consists in increasing the longitudinal stability of the bridge assembly machine, in reducing the complexity and in ensuring the reliability of the assembly. 1 independent, 2 dependent clauses, 11 explanatory figures

Description

The utility model relates to military engineering, and specifically to mechanized complexes consisting of collapsible bridge structures, bridge assembly machines for assembling and laying bridge structures on an obstacle, and transporters for transportation of bridge structure elements.

When operating machines for various purposes, made on a wheeled chassis, a very important requirement is to ensure their stability, especially with significant loads, dimensions and weight of structures.

Known universal wheeled tractor of the Minsk Tractor Plant. To exclude the separation of the front wheels from the ground and the loss of tractor steering with significant traction loads on the rear wheels, weights are removably fixed to the nose of the frame (see "Tractors" Belarus ", technical description and operating instructions", Minsk, "Urajay", 1987 city, p. 183). Their number depends on the type of attachment and operating conditions.

A disadvantage of the known tractor is an increase due to cargo of its total mass and, as a consequence, a decrease in cross-country ability.

The well-known "Bridge structure and bridge assembly machine for transporting, assembling and laying on the barrier of the bridge structure" (see RF patent No. 2210656, IPC 7 E01D 15/127), for most of the essential features taken as a prototype. The bridge structure, together with a bridge assembly machine (MSM) and carriers, make up a mechanized bridge complex.

MSM is made on a self-propelled wheeled chassis and is equipped with a device for assembling and laying the NB on an obstacle, a hoisting crane and a winch. Conveyors, like MSM, are made, for example, on a four-axle wheeled chassis.

The bridge structure includes a sectional guidance beam (NL) and a sectional span. NB serves as a supporting structure

for the assembly of the span and consists of two end and four middle sections connected during assembly with each other by means of axes.

The span consists of two end and four middle bridge blocks (MB). Each MB consists of two gauge sections, interconnected by an inter-gauge platform, movably mounted in the guiding gauge sections with the ability to provide sliding and shifting gauge sections. The inter-gauge platform is equipped with a device for moving the MB along the NB, made in the form of a rotating shaft mounted on the platform with support rollers and equipped with a driven gear, interacting with the drive gear of the removable drive mechanism, containing the drive gear and the handle to drive the mechanism manually, and after contacting the connected MB to each other, adjacent gauge sections are interconnected using locking axes through the eyes installed in the lower zone of the connected sections. At the same time, the elements of the bridge structure experience significant bending loads from the dead weight of the NB and the weight of the MB. In addition, due to soil irregularities in the places of installation of the MSM and the low beam on the other side of the obstacle, in the elements of the bridge structure additionally torques arise that cause the deflection of the low beam and the angular displacement of its ends relative to each other (twisting of the low beam). An increase in the stiffness of the NB to exclude its deformation can be achieved only by increasing its weight, which is impractical.

Known bridge mechanized complex has the following disadvantages:

- insufficient longitudinal stability of the MSM from the overturning moment arising during assembly and cantilever extension to a considerable distance of the NB for its laying on the barrier;

- significant efforts on the handle of the device for moving the MB along the NB due to the deflection of the NB from its own weight and the weight of the MB, especially the efforts increase when the opposite bank of the barrier is exceeded;

- significant deformation of the NB causes a mutual linear and angular movement of the ends of the connected MB, does not provide

guaranteed entry of the eyes into each other and the coincidence of the axes of the holes in the eyes, which makes it impossible to connect them with fixing axes.

This useful model solves the problem of increasing the tactical and technical characteristics of a mechanized complex formed by a bridge structure, IMS and transporters.

The technical result achieved in solving the problem lies in increasing the longitudinal stability of the IMS during assembly and laying on the obstacle of the ND due to the formation of a counterweight using a device for installing the counterweight, in reducing the complexity by increasing the level of mechanization to move the MB along the NN, and to ensure reliability assembly through the use of a mounting kit.

The problem is solved in that the bridge assembly machine is equipped with a device for installing a counterweight, which includes base plates laid on the ground and interconnected by a transverse connection, and height-adjustable screw ties made with the possibility of communication using quick-disconnecting axes and eyes with base plates and with the possibility of installation, for example, through rings on the front towing hooks of the chassis frame, while one of the carriers is used as a counterweight by mounting the wheels on the support e slabs ensuring longitudinal stability of the bridge assembly machine from tipping over during assembly and laying of the aiming beam on an obstacle, the length of the transverse connection being selected in accordance with the distance between the axles of the front pairs of wheels of the chassis of the transporters.

The result is achieved if the device for moving bridge blocks of the span along the aiming beam includes a block that is removably mounted on the extendable end of the aiming beam, and a cable whose ends are connected to the traction winch and through this block with a movable bridge block.

The result is achieved if the complex is equipped with an installation kit, including hydraulic jacks with mobile hydrostations and a set of devices for joining and connecting bridge blocks to each other during the assembly of the span on the aiming beam, while the bridge

the blocks are equipped with built-in mechanisms of mutual connection, made with the possibility of converting the rotational motion of the drive shaft into the translational motion of the locking axis for interaction with eyes, rigidly fixed in the lower part of the connected bridge blocks.

The analysis of the main distinguishing features showed that:

- supplying the bridge assembly machine with a device for installing a counterweight, which includes support plates laid on the ground and interconnected by a transverse connection, and height-adjustable screw ties made with the possibility of communication with quick-detachable axes and eyes with support plates and with the possibility of installation , for example, through rings on the front towing hooks of the chassis frame, and the choice of the length of the transverse connection in accordance with the distance between the axles of the front pairs of wheels of the chassis of the transporters, allowed to use as a counterbalance to the moment of force created by the extended cantilever aiming beam (to a distance of 41 m), one of the loaded carriers by setting it with wheels on the base plates and thereby prevent the bridge assembly machine from tipping over;

- the inclusion in the device for moving bridge blocks of the superstructure along the pickup beam of a block removably mounted on the extendable end of the pickup beam and a cable whose ends are connected to the traction winch and through the indicated block with a movable bridge block, made it possible to increase the level of mechanization of the assembly operation of the bridge structure and beyond due to this, reduce its complexity;

- supplying the complex with an installation kit, including hydraulic jacks, a mobile hydraulic station and a set of devices for docking and connecting the bridge sections to each other, supplying the bridge blocks with a built-in mutual connection mechanism that is capable of converting the rotational movement of the drive shaft into the translational motion of the fixing axis for interaction with the eyes, rigidly fixed at the bottom of the connected bridge blocks, ensured the collectability of the bridge structure with a minimum cost of belt.

The essence of the utility model is illustrated by drawings, which show:

- figure 1 is a side view of the IMS during the assembly of the NB;

- figure 2 - installation of a device for installing a counterweight on the MSM;

- figure 3 is a view of the nose of the MSM with a device for installing a counterweight, view A in figure 2;

- figure 4 - the position of the MB to their connection and the device for moving the MB;

- figure 5 - the position of the MB after their connection;

- figure 6 is a block installation of a device for moving MB, element A in figure 4;

- Fig.7 - installation of the installation kit when connecting MB;

- Fig. 8 is a view A in Fig. 7;

- figure 9 - installation of hydraulic cylinders and a lift to the connection MB;

- figure 10 - installation of the contraction device to connect the MB;

- figure 11 is the position of the MB after aligning the axes of the eyes of the connected MB.

The mechanized bridge complex (see Fig. 1), designed to assemble and lay bridge crossings up to 41 m in length, consists of a bridge structure, a bridge assembly machine (MSM) 1 and several transporters 2.

The bridge structure includes a sectional guidance beam 3 (NB) and a sectional span assembled from bridge blocks (MB) 4.

MSM is made, for example, on a four-axle wheeled chassis and is intended for assembly and installation on the NB 3 obstacle, which serves as the supporting structure along which the MB 4 slide and bridge assembly are assembled.

The transporters 2 are made on the same chassis as the MCM 1 and are intended for transportation to the transition guidance point of the components of the bridge structure.

To ensure the longitudinal stability required during assembly and cantilever extension to the NB 3 barrier, the IMS is equipped with a removable

a device for installing a counterweight (see figure 2, 3). The device consists of two base plates 5, a transverse connection 6 between the plates, two height-adjustable screw ties 7 and pivotally connected to them, rings 8 for interaction with towing hooks 9 on the chassis frame. Each base plate 5 is made with an eye 10 for swivel connection with a screed 7 and is provided with a finger 11 for connection with a transverse link 6. The length of the transverse link 6 is selected with a distance L between the axes of the base plates equal to the distance between the axles of the front pair of wheels 12 of the conveyor 2.

Traction winch 13 (see FIGS. 4, 6), quick-detachable unit 14 and displacement cable 15 are designed to move MB 4 along the NB 3 during the span assembly. Block 14 is configured to be installed on the end of the extendable section NB 3, while the ends of the cable movements 15 are connected with the traction winch 13 and through the indicated unit with the movable MB 4.

Each MB 4 consists of two gauge sections 16 (see Fig. 8), interconnected by an inter-gauge platform 17, movably mounted in the guides of the gauge sections with the possibility of providing sliding and shifting of the gauge sections 16. For joining and connecting MB 4 to each other during assembly the span structure on the aiming beam 3, the mechanized complex is equipped with an installation kit (see Figs. 7-11), for quick-installation of which at the ends of the connected MB 4 seats are arranged. The kit includes:

- hydraulic jacks, consisting of mobile hydrostations 18 with manual hydraulic pumps and hydraulic cylinders 19, made with the possibility of installing the rods down in the support sleeves 20 with the stop ends of the rods in NB 3;

- a lift made with the possibility of installation on the hydraulic cylinders 19 with its supports 21, which at the same time have the ability to connect the inclined screw ties 22 with the flooring of the gauge sections 16;

- tightening devices 23, made with the possibility of installation on the floor of the gauge sections 16 along their axes;

- connection mechanisms built into the gauge sections 16 and configured to convert the rotational movement of the drive shaft 24 with a key (a turn-key shank is made at the end of the shaft, brought into the hole in the floor of the gauge sections 16) into the translational movement of the locking axis 25 for interaction with the eyes 26, rigidly fixed at the bottom of the connected MB.

Work

Elements of NB 3 and MB 4 are delivered to the place of organization of the bridge over the barrier by carriers 2. MSM 1 is installed on the shore of the barrier and horizontally in the longitudinal and transverse directions using hydraulic outriggers. Then, to increase the longitudinal stability of the MSM 1, a device is mounted for installing a counterweight. On the front towing hooks 9 of the chassis frame, through the rings 8, screw ties 7 are installed with support plates 5 attached to them, a transverse connection is fixed between them 6. To compensate for slopes and roughnesses of the obstacle shore, screw ties 7 adjust the position of the support plates 5 on the ground. One of the transporters 2, loaded with MB 4 and used after assembly of the NB, leans on the base plates 5 with the left front wheels 12 (which provides a good overview for the driver) and puts the car on the parking brake. The conveyor 2 as a counterweight reliably holds the MSM 1 from tipping over when assembling and laying the NB on the obstacle. After installing the NB, the transporter 2 slides off the base plates 5 and drives up to unload to assemble the span, and the device is removed.

Next, the bridge structure is assembled. It is assembled, extended and laid on the NB 3 barrier, while block 14 is installed on the end of the NB 3 extendable section, the movement cable 15 is stored through block 14 and one end of it is connected to the traction winch 13. MB 4 are sequentially stacked on the NB 3, connected to the cable movement 15 and winch 13 are moved along the NB 3 to the opposite bank of the obstacle. Attachable MB 4 is moved all the way to the end MB, which is secured with a lanyard (not shown in Fig.). In this case, under the action of the dead weight of NB 3 and the weight of MB 4, deflection of NB 3 occurs, and the ends

abutting MB 4 occupy a position in which the eyes 26 do not match. To ensure the assembly of the span, an installation kit is installed on the MB 4 connected. Hydrostations 18 are installed on the inter-gauge platforms 17, the hydraulic cylinders 19 with their rods down to the support sleeves 20, the elevator supports 21 are installed on the upper ends of the hydraulic cylinders 19, which are connected by inclined screw ties 22 to the floor of the gauge sections 16, along the axes of which the tensioning devices 23 are installed on the deck. Depending on the relative position of the eyes 26, by shortening the inclined screw ties 22 of the elevator and, accordingly, by raising the gauge sections 16 along the inclined guides, a rise and a transverse eremeschenie eyelets 26 to their entry into each other. Then, by turning the levers of the contractions 23, the attachable MB is moved to one another against the stop of the upper ends of the gauge sections 16. Next, the lift and the tightening devices 23 are removed from the hydraulic cylinders 19, the hydraulic fluid is pumped into the hydraulic cylinders 19 by the hydraulic stations 18, while their rods abut against the NB 3, and the bodies connected to the gauge platforms 17 raise them and the associated gauge sections 16 to align the axes of the eyes 26. Then, by rotation of the drive shafts 24, the locking axes 25 move into the holes of the eyes 26 and connect them. The installation kit is transferred to the next span joint and the operation is repeated.

Thus, this useful model solved the task of increasing the tactical and technical characteristics of a mechanized complex formed by a bridge structure, MSM and transporters.

Claims (3)

1. A mechanized bridge complex comprising a sectional bridge structure in the form of a guiding beam and a span, a bridge assembly machine with a device for moving bridge blocks of the span along a sight beam and conveyors of the bridge construction blocks, characterized in that the bridge assembly is equipped with a device for installing a counterweight, which includes base plates laid on the ground and interconnected by a transverse connection, and height-adjustable screw ties made with possible communication using quick-release axles and eyes with base plates and with the possibility of installing, for example, through rings on the front towing hooks of the chassis frame, one of the carriers being used as a counterweight by mounting wheels on base plates with the longitudinal stability of the bridge assembly from tipping over during assembly and laying on the obstacle of the aiming beam, and the length of the transverse connection is selected in accordance with the distance between the axles of the front pairs of wheels of the chassis of the transporters. 2. The bridge mechanized complex according to claim 2, characterized in that the device for moving bridge blocks of the span on the aiming beam includes a unit removably mounted on the extendable end of the aiming beam, and a cable whose ends are connected to the traction winch and through said block movable bridge unit. 3. The bridge mechanized complex according to claim 1, characterized in that the complex is equipped with an installation kit, including hydraulic jacks with mobile hydrostations and a set of devices for docking and connecting bridge blocks to each other when assembling the span on a high-beam, while the bridge blocks are equipped with built-in mechanisms interconnection made with the possibility of converting the rotational motion of the drive shaft into the translational motion of the locking axis for interaction with the eyes, rigidly for replennymi the bottom of the connectable bridge blocks.