BG113744A - POSITIONING DEVICE FOR RUBBER TRACKS REGENERATION PRESS - Google Patents

Abstract

The device for a rubber chain retreading press created according to the present utility model includes a steel chassis (2) mounted on which are the running tracks (4) of a tensioning car (5). A pair of toothed racks (3), which form part of the drive train of the tensioning car (5), are mounted on the steel chassis (2) in parallel to the running tracks (4). The tensioning car (5) accommodates a tensioning drum (1) mounted on a shaft (24) which rests on bearing bodies on a stationary stand (7) and on a pivoted stand (9). Said tensioning drum (1) can be tilted by means of a hydraulic cylinder (22), at each end of the tensioning drum (1) it is possible to install movable separable retainers (21 and 31) and the middle of the tensioning drum (1) carries a drive belt (27) with towing ropes (28) and clips (29) attached to it. At the two sides of the body of the press there are beams (14) with lower fixed roller ways (10) and upper movable roller ways (6) secured to said beams by means of braces.

Description

Positioning device for a press for regenerating rubber tracks

Field of technology

The present invention relates to a positioning device for a press for regenerating rubber tracks, which will find application in the field of both transport equipment and agriculture in regenerating rubber tracks.

Prior art

Rubber tracks can be installed on mini excavators and mini loaders, tractors and combines, as well as on heavy transport and construction machines. The design and material from which the rubber tracks are made ensure longer operation, stability and operator comfort when working with the machine. The supplied rubber tracks for construction and agricultural machinery are a combination of high wear resistance and minimal vibration.

Rubber tracks for construction and agricultural machinery are made from a blend of natural and synthetic rubber, with added anti-abrasive chemical agents to reduce the rate of wear caused by friction on abrasive or compact surfaces. Regeneration is a process that extends the life of a rubber track for several more lifetimes by restoring the worn tread and worn guide or drive buffers, which has both economic and environmental advantages. Regeneration involves reusing the base of the track, the so-called carcass, on which a new tread and new guide or drive buffers are made. This significantly reduces the cost of the track and prevents the disposal of worn track into the environment.

The restoration of rubber tracks is carried out in certain sections, limited by the length of the molding die. This requires moving the rubber tracks after each stage. In practice, there is no known device with the help of which the assembly, movement and dismantling of rubber tracks is carried out.

Technical essence of the invention

The object of the invention is to create a positioning device for a press for regenerating rubber chains, which ensures the restoration of rubber chains in certain areas, depending on the length of the molding matrix of the press, ensuring accurate positioning of the rubber chains on the press after completion of each stage.

The task is solved by creating a positioning device for a press for regenerating rubber tracks, which includes a steel chassis, on which are mounted tracks for moving a tensioning car. On the steel chassis, parallel to the tracks, two toothed racks are mounted, representing part of the drive of the tensioning car, which drive is also carried out by two hydraulic motors through gears. The movement of the tensioning car is carried out by means of running wheels attached to it. On the tensioning car, a tensioning drum is installed, mounted on a shaft, bearing by means of bearing bodies on a stationary stand and a hinged stand. The tensioning drum is capable of tilting by means of a hydraulic cylinder, whereby the tensioning drum is driven by a hydraulic motor and a second gear meshed with another gear mounted on the tensioning drum. At both ends of the tension drum, there is a possibility to install movable divisible limiters to limit the lateral displacement of the rubber chains, and in the middle of the tension drum, a power belt is attached by a plate, to which traction ropes are attached and clips are attached to them. For removal and subsequent movement of the rubber chain, two beams are established on both sides of the press body, to which a right plate and a left plate are mounted, and a lower plate is mounted on the lower side of the press. The right, left and lower plates are the basis for mounting lower fixed roller tracks, and a short guide and a long guide are mounted on the right plate and the left plate, guiding the movement of upper movable roller tracks, divided into segments, moving in the vertical direction by other hydraulic cylinders. The body of the upper movable roller tracks is made of a half-pipe with cut holes for the passage of the other hydraulic cylinders, to which two sectors are welded, allowing the installation of rollers.

In the preferred embodiment of the invention, a special slider is installed between the lower die of the press and the rubber chain.

The advantage of the created positioning device is the possibility of accelerating the process of mounting, dismounting and moving the rubber chain on the press, as well as reducing the labor intensity of the process. In addition, the device ensures accurate positioning of the rubber chain on the press, which increases the quality of the produced regrind.

Description of the attached figures

The present invention is illustrated in the accompanying figures, where:

Figure 1 is a front view of a positioning device for a press for regenerating rubber tracks;

Figure 2 is a top view of the device of Figure 1;

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Figure 3 is a side view of the device of Figure 1;

Figure 4 is a top and side view of a positioning device for a press for regenerating rubber tracks up to 6,400 mm in length; and

Figure 5 is an axonometric view of a tension drum.

Examples of implementation of the invention

The created positioning device for a press for regenerating rubber tracks, shown in the attached figures, includes a steel chassis 2, on which, with bolted connections, tracks 4 are mounted for moving a tensioning carriage 5. On the steel chassis 2, parallel to the tracks 4, two toothed racks 3 are mounted, representing part of the drive of the tensioning carriage 5, which drive is also carried out by two hydraulic motors 20 through gears 19. The movement of the tensioning carriage 5 is carried out by means of running wheels 18 attached to it. On the tensioning carriage 5, a tensioning drum 1 is installed, mounted on a shaft 24, bearing by means of bearing bodies on a stationary stand 7 and a hinged stand 9. The tensioning drum 1 by means of a hydraulic cylinder 22 is capable of tilting at a certain angle, thus allowing to install the corresponding rubber chain. The tensioning drum 1 is driven by a hydraulic motor 8 and a second gear 25, meshed with another gear 23, mounted on the tensioning drum 1, and at both ends of the tensioning drum 1 there is a possibility of mounting movable divisible stops 21 and 31 to limit the lateral displacement of the rubber chains. In the middle of the tension drum 1, a power belt 27 is secured by a plate 26, to which traction ropes 28 are attached and clips 29 are attached to them. For removal and subsequent movement of the rubber chain, two beams 14 are installed on both sides of the press body, to which a right plate 16 and a left plate 17 are mounted, and a lower plate 15 is mounted on the lower side of the press, as the right 16, left 17 and lower 15 plates are the basis for mounting lower fixed roller tracks 10. A short guide 13.1 and a long guide 13.2 are mounted on the right plate 16 and the left plate 17, guiding the movement of the upper movable roller tracks 6. The upper movable roller tracks 6 are divided into segments moving in the vertical direction by other hydraulic cylinders 12, as The housing of the upper movable roller tracks 6 is made of a half-pipe with holes cut out for the passage of the other hydraulic cylinders 12, to which half-pipe two sectors are welded, allowing the installation of rollers 30. A special slider 11, representing an aluminum board, is installed between the lower die of the press and the rubber chain, which aluminum slider 11 prevents the formed cams of the rubber chain from falling back into the lower die and allows the chain to slip and move to the next vulcanization step.

The use of the created positioning device for a press for regenerating rubber tracks depends on the length of the rubber tracks that are being regenerated.

When the rubber tracks are 5944 to 6400 mm long, the rubber track is clamped in the upper branch in a suitable manner at two places, approximately 2200 mm apart, and is lifted and mounted on the press using a two-hoist assembly crane. After it has been inserted using the upper roller tracks 6, the track is lifted and the material for the inner cams is placed in the space created in the lower die. Strips of unvulcanized rubber are placed in the space between the cam material and the press, which, after pressing, will restore the scraped inner layer of the rubber track carcass.

On the upper side of the chain, the material for restoring the tread part is placed, also in the form of strips of unvulcanized rubber, as well as the material for forming the new chain grippers, and the press is closed, and vulcanization is carried out at a certain temperature and pressure. After the first vulcanization cycle is completed, the rubber chain with the cams and grippers formed on it is removed from the lower matrix using the two upper roller tracks 6, moved in a vertical direction by the other hydrocylinders 12. The special slider 11 is installed between the lower matrix and the newly formed cams and the chain is lowered onto it, creating conditions for its movement and subsequent vulcanization. With the help of the power belt 27, attached to the tension drum 1 and the traction ropes 28 attached to the belt 27, and by means of the clips 29 attached to the chain, the drum 1 is rotated and the rubber chain is moved and set for the second vulcanization cycle. With the help of the other hydraulic cylinders 12 and through the upper roller paths 6, the chain is lifted and the special slider 11 is removed, and the material for the inner cams is placed in the created space in the lower die. Strips of unvulcanized rubber are placed between the material for the cams and the die, which after pressing restore the inner layer of the rubber chain carcass. Strips of unvulcanized rubber are placed on the upper side of the chain to restore the tread part of the chain, as well as the material for forming the new grippers, and the press is closed. After the entire vulcanization process is completed, the rubber chain is released from the lower and upper dies and the upper roller tracks 6 are lifted and the restored chain is removed from the die. The chain is removed from the press after it is caught in two places by two hoists and an assembly crane standing about 2200 mm apart.

When the rubber chains are 6400 to 10060 mm long, the tensioning drum 1 is used to ensure the necessary tension of the rubber chain, installed on the tensioning carriage 5, which is driven by the hydraulic motors 20 and the gears 19, engaged with the toothed racks 3. The tensioning carriage 5 together with the tensioning drum 1 is moved to the place allowing the installation of a chain of the corresponding length. The separable limiter 21 is removed from the tensioning drum 1 to ensure unhindered installation of the rubber chain on the tensioning drum 1, which is released from the stationary stand 7 and with the help of the hydraulic cylinder 22 is raised at an angle of about 8°. The rubber chain is caught in a suitable manner at two places, approximately 2200 mm apart from two hoists and, using the assembly crane, is mounted simultaneously on the press and on the tension drum 1. When mounting the rubber chain on the tension drum 1, it is inserted into the freed space between the tension drum 1 and the tensioning car 5. Then, using the hydraulic cylinder 22, the tension drum 1 is lowered back onto the stationary stand 7 and bolted to it. The rubber chain is then symmetrically placed on the drum 1, with the divisible stops 21 and 31 being moved relative to the width of the regenerated strip so as to prevent the strip from shifting during the rotation of the tensioning drum 1. After the rubber chain is installed on the tensioning drum 1, it is moved back by means of the movement of the tensioning wheel 5 until the required tension force is achieved, which prevents the rubber chain from slipping during its rotational movement. After the chain is inserted using the upper roller tracks 6, it is lifted and the material for the internal cams is placed in the space created in the lower matrix.

In the space between the material for the cams, strips of unvulcanized rubber are placed, which after pressing will restore the scraped inner layer of the rubber chain carcass. On the upper side of the chain, the material for restoring the tread part in the form of strips of unvulcanized rubber and the material for forming the new grippers of the rubber chain are placed and the press is closed. For a certain time at certain pressure and temperature, the vulcanization process of the first step is performed. After the first vulcanization cycle is completed, the rubber chain together with the cams added to it is removed from the mold with the help of the two upper roller tracks 6, which are moved in a vertical direction by the other hydrocylinders 12. A special slider (aluminum board) 11 is installed between the lower mold and the newly formed cams and the chain is lowered onto it. Thus, conditions are created for moving the rubber sheet for the next step of vulcanization. Due to the long length of the chain, if a slack appears, it can be reduced by tensioning with the tensioning drum 1 within the permissible force. By driving the tensioning drum 1, carried out by the hydraulic motor 8 and the other gears 23 and 25, the rubber chain is moved to the required place for the next vulcanization cycle. With the help of the other hydraulic cylinders 12 and by means of the upper roller tracks 6, the chain is lifted, the special slider 11 is removed, and the material for the new row of cams is added. In the space between the material for the cams, strips of unvulcanized rubber are placed, which after pressing will restore the scraped inner layer of the rubber chain carcass. On the upper side of the chain, the material for restoring the tread part in the form of strips of unvulcanized rubber and the material for forming the new grippers of the rubber chain are placed and the press is closed.

These manipulations are repeated until the rubber chain is covered with the new elements (cams and protector) along its entire length. The next operation is the dismantling of the rubber chain from the press. By means of the other hydraulic cylinders 12, the upper roller tracks 6 are raised and the restored chain is removed from the matrix.

The tensioning roller 5 together with the tensioning drum 1 are moved forward. The divisible limiter 21 is dismantled, the tensioning drum 1 is released from the stationary stand 7 and with the help of the hydraulic cylinder 22 it is lifted at the required angle of about 8°. The created clearance between the tensioning drum 1 and the tensioning roller 5 is sufficient for the passage of the regenerated chain together with the newly formed cams, protector and grippers.

The chain is caught in the upper branch in a suitable manner at two places, approximately 2200 mm apart, with two hoists and, using the assembly crane, is simultaneously removed from the press and from the tensioning drum 1.

The created positioning device accelerates the process of mounting, dismounting and moving the rubber chain on the press, which is a labor-intensive process. It ensures accurate positioning of the rubber chain on the press, which increases the quality of the remanufactured product.

Claims (2)

1. A positioning device for a press for regenerating rubber tracks, characterized in that it includes a steel chassis (2), on which are mounted tracks (4) for moving a tensioning carriage (5), and on the steel chassis (2), parallel to the tracks (4), two toothed racks (3) are mounted, representing part of the drive of the tensioning carriage (5), which drive is also carried out by two hydraulic motors (20) through gears (19), and the movement of the tensioning carriage (5) is carried out by means of running wheels (18) attached to it, wherein a tensioning drum (1) is installed on the tensioning carriage (5), mounted on a shaft (24), bearing by means of bearing bodies on a stationary stand (7) and a hinged stand (9), which tensioning drum (1) is capable of tilting by means of a hydraulic cylinder (22), at wherein the tensioning drum (1) is driven by a hydraulic motor (8) and a second gear wheel (25), meshed with another gear wheel (23), mounted on the tensioning drum (1), and at both ends of the tensioning drum (1) there is provided the possibility of mounting movable divisible limiters (21 and 31) to limit the lateral displacement of the rubber chains, and in the middle of the tensioning drum (1) by means of a plate (26) a power belt (27) is fixed, to which traction ropes (28) are attached and clips (29) are attached to them, whereby for the removal and subsequent movement of the rubber chain on both sides of the press body two beams (14) are established, to which a right plate (16) and a left plate (17) are mounted, and a lower plate (15) is mounted on the lower side of the press, such that the right (16), left (17) and the lower (15) plates are the basis for mounting lower fixed roller tracks (10), and on the right plate (16) and the left plate (17) are mounted a short guide (13.1) and a long guide (13.2), guiding the movement of upper movable roller tracks (6), divided into segments, moving in the vertical direction by another hydraulic cylinder (12), as the body of the upper movable roller tracks (6) is made of a half-pipe with cut holes for the passage of the other hydraulic cylinders (12), to which half-pipe two sectors are welded, allowing the installation of rollers (30). 2. Positioning device for a press for regenerating rubber chains, according to claim 1, characterized in that a special slider (11) is mounted between the lower matrix of the press and the rubber chain.