RU2793371C1 - Connecting of caterpillars of a tracked vehicle - Google Patents

Abstract

FIELD: caterpillars; tracked vehicle.

SUBSTANCE: connecting caterpillars of a tracked vehicle (hereinafter referred to as TV) in field and stationary conditions. Tightening the ends of the caterpillar between the drive wheel and the front support roller with tightening fixtures, rotating the screws of the tightening fixtures to a position that allows installing the brackets on the pins of the connected tracks, putting the brackets on the pins after tightening the connected tracks, removing the tightening fixtures, installing the bolts in the brackets with a combination fixture. The combination fixture provides simultaneous rotation of the screws of the tightening fixtures and the stop of the wedge pusher with a sharpening angle of 165 degrees to the adjacent edges of the treads of the connected tracks.

EFFECT: reduction of the complexity of the caterpillar connection, as well as ensuring the durability of the tightening fixtures of the caterpillars and the reliability of the caterpillar mover.

1 cl, 2 dwg

Description

The invention relates to the repair of tracked vehicles. EFFECT: invention makes it possible to quickly and reliably connect a caterpillar with a rubber-metal joint of a caterpillar machine (hereinafter referred to as GM) in field and stationary conditions after putting on the caterpillar when replacing it or after removing one track when tensioning the caterpillar.

The GM caterpillar mover is the most loaded and subjected to significant wear structural element. Most often, the rims of the driving wheels and damaged tracks are to be replaced. When the bushings of rubber-metal joints are worn, the gap between the tracks increases, the caterpillar is extended. This increase is compensated by the track tensioning mechanism and the removal of one or two tracks. If there is a minimum allowable number of tracks in the caterpillar and it is impossible to adjust the tension of the tracks in accordance with the operating instructions, the caterpillar must be replaced.

When installing a new track or after removing one or two tracks, the track must be connected.

A known method of connecting caterpillars GM, in which the ends of the caterpillar (between the drive wheel and the front track roller) are connected by coupling devices, which are put on the fingers of the connected tracks with their grips. The screws of the tie-down devices rotate to a position that allows you to install the brackets on the fingers of the connected tracks. To prevent distortions or breaks of the tie-down devices from the fingers of the connected tracks, the tightening is carried out evenly, by alternate rotation of the screws of the tie-down devices. After tightening the pins of the tracks to be connected, the brackets are put on and the clamping devices are removed, a template is installed under the front support roller from the side of the drive wheel, the machine slowly moves forward until the caterpillar junction moves to the template and stops, bolts are installed in the brackets and tightened with a force of 490-588 N on the shoulder 800 mm. After tightening the bolts, the machine moves back and the template is removed.

At the same time, in the absence of a template (in the field), the bolts for fastening the track wedges of the connected tracks are tightened on the idler wheel in the following order: the machine slowly moves forward until the connected tracks move to the rim of the idler wheel, the bolt for fastening the bracket on the outside of the track is tightened, then the machine slowly moves forward until the connected tracks move to the inclined section of the caterpillar between the guide wheel and the sixth track roller, after which the bracket fastening bolt is tightened from the inside of the caterpillar. At the same time, a connection without a template is allowed as a temporary one, followed by re-tightening of the caterpillar bolts connected according to the template, with the replacement of the bolts (at the junction) if they are dented [Infantry fighting vehicle BMP-2. Technical description and operating instructions. Part 2. Second edition. - M.: Military Publishing, 2001. - 320 p.].

As disadvantages of the existing method, there are increased labor costs due to the implementation of uniform alternate rotation of the screws of the tie devices in order to ensure the reliability of the operation and avoid distortions or breakdowns of the tie devices from the fingers of the connected tracks, the use of a template available in the group set of spare parts, tools and accessories (hereinafter referred to as spare parts and accessories) and missing on each machine, the need to move the machine both when using a template and in the absence of it, which also causes difficulty when performing work when the machine is in a shelter or in a confined space. At the same time, the implementation of the method in exceptional situations without the use of a template reduces the durability of the caterpillar connection elements and the reliability of the caterpillar mover, and also requires re-work using the template and is marked by a high probability of deformation of the bolts with their subsequent replacement in this case.

The objectives of the present invention is to develop a method for connecting the caterpillars of the GM, which excludes the movement of the machine during its implementation, including in the field without re-performing work in stationary conditions, and aimed at reducing the time and laboriousness of connecting the caterpillars, as well as ensuring the durability of the connecting elements of the caterpillars and reliability work of the caterpillar mover.

The technical result is achieved by the fact that the method of connecting the GM caterpillar, including tightening the ends of the caterpillar (between the drive wheel and the front support roller) with tie-down devices, which are put on the pins of the connected tracks with their grips, rotation of the screws of the tie-down devices to a position that allows you to install the brackets on the pins of the connected tracks , putting on the staples on the fingers after tightening the connected tracks, removing the clamping devices, installing the bolts in the brackets and tightening them with a force of 490-588 N on a shoulder of 800 mm, involves the use of a combined device that provides simultaneous rotation of the screws of the coupling devices and the stop of the wedge pusher with a taper angle 165 degrees into the adjacent edges of the running tracks of the connected tracks, while after tightening the connected tracks, putting on the brackets on the fingers and removing the clamps of the clamping devices from the fingers, the clamps are installed on both sides of the neighboring brackets and the screws of the clamping devices and the wedge screw are simultaneously rotated pusher directed perpendicular to the running tracks of the connected tracks in the middle part of the place where they adjoin each other, when the sides of the wedge pusher are in tight gapless contact with the running tracks of the connected tracks, the bolts are installed in the brackets and tightened, after which the combined device is removed.

Distinctive features from the prototype is the use of a combined device that provides simultaneous rotation of the screws of the clamping devices and the emphasis of the wedge pusher with a taper angle of 165 degrees in the edges of the running tracks of the connected tracks adjacent to each other, while after tightening the connected tracks, putting on the brackets on the fingers and removing them from the fingers clamps of clamping devices, the clamps are installed from two sides on adjacent brackets and simultaneous rotation of the screws of the clamping devices and the screw of the wedge pusher, directed perpendicular to the running tracks of the connected tracks in the middle part of the place where they adjoin each other, when a tight gapless contact of the sides of the wedge pusher is achieved with the treadmills of the connected tracks, the bolts are installed in the brackets and tightened, after which the combined device is removed.

During the implementation of the caterpillar connection method, a combined device (option) is used, consisting of four grips 1 and 2 (Fig. 1), connected in pairs by crossbars 3 and 4, two housings 5 made integral with the hooks 2, with screws 6 installed inside, on which nuts 7 are screwed, made integral with the hooks 1. Inside the cross member 4, a worm shaft 8 is installed, which engages with gear wheels 9 mounted rigidly on the screws 6. At the ends of the shaft 8, ratchet heads 10 are made. A clutch 11 is installed on the cross member 4, which has the possibility of axial movement along the cross member 4 and rotation around its axis. The front ends of two guides 12 are rigidly attached to the coupling 11, the rear ends of which pass through the eyelet 13 on the cross member 3. The guides 12 are equipped with two couplings 14 with rotating bushings 15, between which a nut 16 is installed, inside which the screw 17 of the wedge pusher 18 rotates. the end of the screw 17 is made with a wrench head.

When rotating a ratchet (not shown) mounted on one of the heads 10 of the worm shaft 8, two gear wheels 9, which are meshed with the shaft 8, and together with them the screws 6 rotate. When the screws 6 rotate, the nuts 7 move axially together with hooks 1. When the screw 17 is rotated, the wedge pusher 18 moves axially.

Combination device options may vary.

The essence of the invention lies in the fact that when the caterpillar is connected, the grips 1 and 2 are put on the fingers 19 and 20 of the connected tracks 21 and 22. By simultaneously rotating the screws 6 of the coupling devices through the worm gear 8 and 9, the ends of the caterpillar (between the drive wheel and the front track roller) are pulled together to a position that allows you to install the brackets 25 (Fig. 2) on the fingers 19 and 20 of the connected tracks 21 and 22, after which the brackets 25 are put on the fingers 19 and 20. After installing the brackets 25, the grips 1 and 2 (Fig. 1) of the clamping devices from the indicated fingers are removed. Then, by rotating the screws 6 of the tie rods in the opposite direction, the distance between their grips 1 and 2 increases. Next, the grips 1 and 2 are installed on both sides of the adjacent brackets 23 and 24 and the screws 6 of the tie rods are simultaneously rotated and the screw 17 of the wedge pusher 18, directed perpendicularly to the treadmills of the connected tracks 21 and 22 (Fig. 2) in the middle part of the place where they adjoin each other. Upon reaching a tight gapless contact of the sides of the wedge pusher 18 with the treadmills of the connected tracks 21 and 22, bolts 26 are installed in the brackets and tightened with a force of 490-588 N on a shoulder of 800 mm, after which the combined device is removed.

The proposed method is easily implemented in the field, allows you to quickly and with a high degree of reliability to connect the GM caterpillar and does not require the movement of the machine during its implementation. The presence of a combined device in an individual set of spare parts and accessories for each machine eliminates the need to use a template located in a group set of spare parts and accessories, as well as the negative consequences of implementing the existing method without using a template. This reduces the likelihood of violations of safety requirements and the occurrence of injuries.

The technical result of the implementation of the proposed method of connecting the GM caterpillar is to exclude the movement of the machine during its implementation, including in the field without re-performing work in stationary conditions, reducing the time and laboriousness of connecting the caterpillar, as well as ensuring the durability of the connecting elements of the caterpillars and the reliability of the caterpillar mover.

Claims (1)

A method for connecting a caterpillar track of a caterpillar machine, including tightening the ends of the caterpillar (between the drive wheel and the front support roller) with tie-down devices that are put on the pins of the connected tracks with their grips, turning the screws of the tie-down devices to a position that allows you to install the brackets on the pins of the connected tracks, putting the brackets on the pins after tightening the connected tracks, removing the clamping devices, installing the bolts in the brackets and tightening them with a force of 490-588 N on a shoulder of 800 mm, characterized by the use of a combined device that provides simultaneous rotation of the screws of the clamping devices and the stop of the wedge pusher with a taper angle of 165 degrees into adjacent each to each other, the edges of the running tracks of the connected tracks, while after tightening the connected tracks, putting on the brackets on the fingers and removing the clamps of the coupling devices from the fingers, the clamps are installed on both sides of the adjacent brackets and the screws of the clamping devices and the screw of the wedge pusher directed perpendicular to the treadmills of the connected tracks in the middle part of the place where they adjoin each other, upon reaching a tight clearance-free contact of the sides of the wedge pusher with the treadmills of the connected tracks, the bolts are installed in the brackets and tightened, after which the combined device is removed.

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