Belt tensioner

Abstract

The utility model discloses a kind of belt tensioning device, specifically related to tensioning device technical field, including device main body, drum seat device main body includes shell, drum seat shell inside is provided with belt, the bottom of drum seat shell is symmetrically provided with extension plate, the outer wall of drum seat extension plate is provided with slide rail, the bottom of drum seat slide rail is provided with gear box, the inside of drum seat slide rail is provided with second tensioning mechanism, for longitudinally tensioning belt;The bottom of drum seat shell is provided with fixed block on both sides, the inside of drum seat fixed block is provided with first tensioning mechanism, for transversely tensioning belt.The utility model can make the stroke of both sides drum seat synchronous by first tensioning mechanism, prevent the situation of inclination causes belt deviation.

Description

Technical Field

[0001] This utility model relates to the field of tensioning device technology, specifically to a belt tensioning device. Background Technology

[0002] Bucket wheel stacker-reclaimers are large-scale, continuous loading and unloading equipment specifically designed for stacking and reclaiming materials in stockyards. They are widely used in basic industries such as metallurgy and chemicals. They achieve material storage or reclaiming and transportation through conveyor belts. The normal operation of the conveyor belt depends entirely on the belt tensioning device. Without this device, the conveyor belt will slip due to insufficient tension (unable to drive the drive drum) or have excessive sag (material spillage and unstable operation), directly causing the equipment to malfunction and even leading to conveyor belt wear and tear.

[0003] A search revealed, for example, Chinese patent application CN205972713U, which discloses a belt conveyor and its belt tensioning device. Two transition rollers are hinged to the frame, both contacting the bottom of the lower belt. A swing arm is mounted on the frame, one end of which is hinged to the frame. A tensioning roller is mounted on the swing arm, positioned between the two transition rollers, and in contact with the upper part of the lower belt. A spring is also provided on the frame to press the tensioning roller against the upper part of the lower belt. The tensioning roller's own weight and spring force press it against the upper part of the lower belt. Simultaneously, the interaction with the two transition rollers achieves belt tensioning. Therefore, while ensuring tension, the weight of the tensioning roller is reduced, while the elasticity is increased, thereby reducing the overall weight of the belt conveyor and making installation and maintenance more convenient.

[0004] However, in actual use, the springs need to be manually compressed to push the rollers and achieve belt tension. To ensure that the springs can effectively tension the belt, existing technology places springs on both sides of the rollers. However, this causes the travel of the roller seats on both sides to be asynchronous, resulting in tilting and belt misalignment. With long-term use, the spring tension needs to be adjusted periodically, requiring multiple maintenance personnel each time, which is time-consuming and labor-intensive. Utility Model Content

[0005] The purpose of this invention is to provide a belt tensioning device that, through a first tensioning mechanism, enables the travel of the two roller seats to be synchronized, preventing the belt from running off-center due to tilting.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a belt tensioning device, comprising a device body, the device body including a housing, a belt disposed inside the housing, a first extension plate symmetrically disposed at the bottom of the housing, a slide rail disposed on the outer wall of the first extension plate, a gearbox disposed at the bottom of the slide rail, and a second tensioning mechanism disposed inside the slide rail for longitudinally tensioning the belt; The bottom two sides of the housing are provided with fixing blocks, and the fixing blocks are provided with a first tensioning mechanism for laterally tensioning the belt. The first tensioning mechanism includes a tensioning cylinder, the output end of which is fixedly connected to a roller seat. A side tensioning roller is installed inside the roller seat, and a cleaning component is provided on the outer wall of the roller seat for cleaning the surface of the belt.

[0007] Preferably, the cleaning assembly includes a connecting plate, a scraper is provided on the top side of one side of the connecting plate, and discharge grooves are symmetrically provided on the bottom side of one side of the connecting plate for discharging the impurities scraped off by the scraper.

[0008] Preferably, an arc-shaped block is provided between the two discharge channels to guide the impurities in the middle section into the discharge channel.

[0009] Preferably, the second tensioning mechanism includes an intermediate tensioning roller, and a threaded rod is rotatably connected inside the slide rail via a bearing, and the inside of the tensioning roller is threadedly connected to the threaded rod.

[0010] Preferably, the gearbox has a worm gear rotatably connected to it via a bearing, and a worm wheel is fixedly sleeved on the bottom of the threaded rod, with the surface of the worm wheel meshing with the worm gear.

[0011] Preferably, a servo motor is fixedly connected to the outer wall of the gearbox, and the output end of the servo motor is fixedly connected to one end of the worm gear.

[0012] Preferably, a second extension plate is symmetrically arranged at the bottom of the gearbox, and a spring buffer is fixedly connected to the top of the second extension plate. The top telescopic end of the spring buffer is fixedly connected to the bottom of the intermediate tensioning roller.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. The belt tensioning device of this utility model drives the side tensioning rollers to move through the tensioning cylinders, thereby tensioning the belt. Because the tensioning cylinders are of the same specification, the stroke of the two roller seats can be synchronized, preventing the belt from running off track due to tilting. Furthermore, by setting a scraper on the outside of the roller seat, the scraper can be moved when the two rollers move, thereby scraping off the impurities adsorbed on the belt surface, which facilitates the subsequent use of the belt. 2. The belt tensioning device of this utility model can drive the intermediate tensioning roller to move downward through a servo motor. When the belt is cleaned by the scraper, the intermediate tensioning roller can move downward to stretch the belt to a certain extent and tension the belt. At the same time, during the movement of the intermediate tensioning roller, the compression spring buffer will provide a certain degree of buffering for the device to prevent the belt from deviating due to vibration during the cleaning process of the belt by the scraper. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the main structure of the device of this utility model; Figure 3 for Figure 1 A schematic diagram of the main structure of the device is not included. Figure 4 This is a schematic diagram of the first tensioning mechanism of this utility model; Figure 5 This is a schematic diagram of the cleaning component structure of this utility model; Figure 6 This is a schematic diagram of the second tensioning mechanism of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Main body of the device; 11. Housing; 12. Fixing block; 13. First extension plate; 14. Slide rail; 15. Gearbox; 2. Belt; 3. First tensioning mechanism; 31. Tensioning cylinder; 32. Roller seat; 33. Side tensioning roller; 34. Cleaning assembly; 341. Connecting plate; 342. Scraper; 343. Discharge trough; 344. Arc block; 4. Second tensioning mechanism; 41. Intermediate tensioning roller; 42. Threaded rod; 43. Worm gear; 44. Worm wheel; 45. Servo motor; 46. Second extension plate; 47. Spring buffer. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0018] This utility model provides, for example Figure 1-6The belt tensioning device shown includes a main body 1, which includes a housing 11. A belt 2 is installed inside the housing 11. The specific installation and working principle of the belt 2 are existing mature technologies and will not be described in detail here. A first extension plate 13 is symmetrically arranged at the bottom of the housing 11. A slide rail 14 is arranged on the outer wall of the first extension plate 13. A gearbox 15 is arranged at the bottom of the slide rail 14. A second tensioning mechanism 4 is arranged inside the slide rail 14 for longitudinal tensioning of the belt 2. Fixing blocks 12 are arranged on both sides of the bottom of the housing 11. A first tensioning mechanism 3 is arranged inside the fixing blocks 12 for transverse tensioning of the belt.

[0019] To prevent belt 2 from running off-center during use, such as Figure 4 As shown, the first tensioning mechanism 3 includes a tensioning cylinder 31, which is fixedly connected to the inside of the fixed block 12. The output end of the tensioning cylinder 31 is fixedly connected to a roller seat 32. A side tensioning roller 33 is installed inside the roller seat 32. The side tensioning roller 33 is located at the bottom of the belt 2 and is used to tension the belt 2. A cleaning component 34 is provided on the outer wall of the roller seat 32 for cleaning the belt surface. In order to prevent the belt 2 from running off-center, the prior art requires tensioning the belt. First, the operator starts the tensioning cylinders 31 on both sides at the same time. The start of the tensioning cylinders 31 can drive the roller seat 32 to move. The movement of the roller seat 32 can start the side tensioning roller 33 to move towards the middle, thereby applying force to the belt 2 and tensioning the belt 2. This application realizes the movement of the two side tensioning rollers 33 by using tensioning cylinders 31. Compared with the spring in the prior art, it can synchronize the stroke of the two roller seats 32 and prevent the belt from running off-center due to tilting.

[0020] To clean the bottom of belt 2, such as Figure 5 As shown, the cleaning assembly 34 includes a connecting plate 341, which is fixedly connected to the outer wall of the roller seat 32. A scraper 342 is provided on the top side of one side of the connecting plate 341, and the blade of the scraper 342 contacts the bottom of the belt 2. Symmetrical discharge grooves 343 are provided on the bottom side of one side of the connecting plate 341 for discharging impurities scraped off by the scraper 342. An arc-shaped block 344 is provided between the two discharge grooves 343 to guide the impurities in the middle section into the discharge groove 343. The cleaning assembly is then connected to the belt by the tensioning cylinder 31. During the movement of the moving roller seat 32, the scraper 342 will move at the bottom of the belt 2, scraping off the impurities adsorbed on the surface of the belt 2. The impurities will fall into the discharge trough 343 and be discharged to the ground through the discharge trough 343. Considering that the tensioning cylinder 31 is set in the middle part of the discharge trough 343, the impurities scraped off from the middle part of the belt 2 will come to the surface of the arc block 344. The arc of the surface of the arc block 344 will guide the impurities into the discharge trough 343 and thus discharge them. At this time, the impurities will not affect the tensioning cylinder 31.

[0021] It is worth noting that the top of the connecting plate 341 is in contact with the bottom of the belt 2, while the top of the arc-shaped block 344 is on the same horizontal plane as the top of the connecting plate 341.

[0022] Considering that the first tensioning mechanism 3 can clean the belt 2 during movement, the tensioning cylinder 31 can be started to its minimum state and then started again to its maximum state, thereby cleaning the bottom of the belt 2 by the scraper 342. At this time, because the side tensioning roller 33 is away from the belt 2, the belt 2 may run off-center. In order to prevent the belt 2 from running off-center under the above circumstances, such as... Figure 6 As shown, the second tensioning mechanism 4 includes a central tensioning roller 41 located inside the middle section of the bottom belt 2, and side tensioning rollers 33 located on both sides of the central tensioning roller 41, and also on the outer side of the bottom of the belt 2. A threaded rod 42 is rotatably connected to the inside of the slide rail 14 via bearings. The inside of the tensioning roller 41 is threadedly connected to the threaded rod 42. A worm gear 43 is rotatably connected to the inside of the gearbox 15 via bearings. A worm wheel 44 is fixedly sleeved at the bottom of the threaded rod 42, and the surface of the worm wheel 44 meshes with the worm gear 43. A servo motor 45 is fixedly connected to the outer wall of the gearbox 15, and the output end of the servo motor 45 is connected to the worm gear 43. One end is fixedly connected. While the scraper 342 moves, in order to ensure that the belt 2 is in a taut state, the belt can be tensioned by the second tensioning mechanism 4. First, the operator starts the servo motor 45. The rotation of the servo motor 45 can drive the worm 43 to rotate. The rotation of the worm 43 can drive the worm wheel 44 to rotate. The rotation of the worm wheel 44 can drive the two threaded rods 42 to rotate. The rotation of the two threaded rods 42 can drive the middle tensioning roller 41 to move downward. During the downward movement of the middle tensioning roller 41, the belt 2 will be stretched, thereby achieving the tensioning of the belt 2. Then the scraper 342 can be used to clean the belt.

[0023] In order to buffer the device during the movement of the intermediate tension roller 41, a second extension plate 46 is symmetrically arranged at the bottom of the gearbox 15. A spring buffer 47 is fixedly connected to the top of the second extension plate 46. The top telescopic end of the spring buffer 47 is fixedly connected to the bottom of the intermediate tension roller 41. When the intermediate tension roller 41 moves, the spring buffer 47 can be compressed, thereby converting the force into the elastic force of the spring, realizing buffering, and preventing the belt from shifting due to vibration during the cleaning of the belt 2 by the scraper 342, thus affecting the cleaning of the belt 2.

[0024] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of the utility model.

[0025] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A belt tensioning device, comprising a device body (1), characterized in that: The main body (1) of the device includes a housing (11), a belt (2) is provided inside the housing (11), a first extension plate (13) is symmetrically provided at the bottom of the housing (11), a slide rail (14) is provided on the outer wall of the first extension plate (13), a gearbox (15) is provided at the bottom of the slide rail (14), and a second tensioning mechanism (4) is provided inside the slide rail (14) for longitudinally tensioning the belt (2); The bottom sides of the housing (11) are provided with fixing blocks (12), and the fixing blocks (12) are provided with a first tensioning mechanism (3) for laterally tensioning the belt; the first tensioning mechanism (3) includes a tensioning cylinder (31), the output end of the tensioning cylinder (31) is fixedly connected to a roller seat (32), the inside of the roller seat (32) is equipped with a side tensioning roller (33), and the outer wall of the roller seat (32) is provided with a cleaning component (34) for cleaning the surface of the belt.

2. The belt tensioning device according to claim 1, characterized in that: The cleaning assembly (34) includes a connecting plate (341), a scraper (342) is provided on the top side of one side of the connecting plate (341), and a discharge groove (343) is symmetrically provided on the bottom side of one side of the connecting plate (341) for discharging the impurities scraped off by the scraper (342).

3. A belt tensioning device according to claim 2, characterized in that: An arc-shaped block (344) is provided between the two discharge channels (343) to guide the impurities in the middle part to move into the discharge channel (343).

4. A belt tensioning device according to claim 1, characterized in that: The second tensioning mechanism (4) includes an intermediate tensioning roller (41), and the inside of the slide rail (14) is rotatably connected to a threaded rod (42) via a bearing. The inside of the tensioning roller (41) is threadedly connected to the threaded rod (42).

5. A belt tensioning device according to claim 4, characterized in that: The gearbox (15) is rotatably connected to a worm (43) via a bearing. A worm wheel (44) is fixedly sleeved on the bottom of the threaded rod (42), and the surface of the worm wheel (44) meshes with the worm (43).

6. A belt tensioning device according to claim 5, characterized in that: A servo motor (45) is fixedly connected to the outer wall of the gearbox (15), and the output end of the servo motor (45) is fixedly connected to one end of the worm gear (43).

7. A belt tensioning device according to claim 6, characterized in that: The bottom of the gearbox (15) is symmetrically provided with a second extension plate (46), and the top of the second extension plate (46) is fixedly connected with a spring buffer (47). The top telescopic end of the spring buffer (47) is fixedly connected to the bottom of the intermediate tension roller (41).

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