Scraper gate chain tensioner

Abstract

The utility model discloses a kind of scraper machine brake disc chain tightening device, transmission mechanism includes guide sleeve and transmission plug, transmission plug is movably equipped in guide sleeve, screw rod is threaded with transmission plug and is equipped in guide sleeve;Brake mechanism includes two groups of support plate hinged and installed in the both sides of guide sleeve and transmission plug, the lower part of support plate is installed pincer arm, the lower end of pincer arm is installed brake block;Support mechanism includes retainer, the retainer includes vertically arranged installation mainboard, two side connection plates are fixedly connected on installation mainboard, the middle part of pincer arm is hingedly connected with retainer by pincer arm pin joint shaft.This scraper machine brake disc chain tightening device, by brake block and brake disc cooperation, to realize the locking brake function of brake disc, to ensure that chain tightening device can normally chain, to ensure that the chain tightening work of scene can be successfully completed in turn.In addition, the device does not need external power, with good operability and safety performance, and simple structure, low manufacturing cost, long service life, convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of chain tensioning device technology, specifically to a chain tensioning device for a scraper conveyor gate disc. Background Technology

[0002] Scraper conveyors are one of the main pieces of equipment in fully mechanized mining faces. During operation, the load on the scraper conveyor constantly changes due to factors such as the reciprocating motion of the coal mining machine, the coal cutting speed, and the movement of the supports, causing the scraper chain to become inconsistent in tension. As the length of the working face increases, the variation in scraper chain tension becomes more pronounced. The tension of the scraper chain directly affects the operating status and performance of the scraper conveyor. Excessive tension increases chain wear and power loss, while excessive looseness can cause chain stacking, affecting the meshing of the chain and sprockets, leading to chain skipping or breakage accidents, which may result in on-site safety incidents.

[0003] Therefore, chain tightening is usually required during scraper conveyor maintenance. The purpose of chain tightening is to eliminate elongation deformation and maintain a uniform preload on the chain. After chain tightening, when the conveyor operates under load, the chain tension and deformation are redistributed with the load, thus ensuring the normal operation of the scraper conveyor.

[0004] Currently, chain tensioning is typically achieved by using a scraper conveyor's drive motor in conjunction with a chain tensioning device. During the chain tensioning process, the brake disc of the drive motor needs to be applied to ensure the chain tensioning operation is completed smoothly. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a scraper conveyor brake disc chain tightening device for locking the brake disc of the drive motor of the scraper conveyor, so as to pre-tighten and tighten the scraper chain by braking the brake disc, and ensure that the chain tightening work on site can be completed safely and efficiently.

[0006] This utility model provides a scraper conveyor brake disc chain tightening device, including a transmission mechanism, a braking mechanism, and a support mechanism, wherein:

[0007] The transmission mechanism includes a guide sleeve and a transmission plug. The guide sleeve is provided with a telescopic outer sleeve, a limiting groove and a screw mounting hole in sequence. The screw is rotatably fitted in the screw mounting hole. One end of the transmission plug is provided with a telescopic inner sleeve. The inner wall of the telescopic inner sleeve is provided with an internal thread. The telescopic inner sleeve is movably fitted in the telescopic outer sleeve, and the telescopic inner sleeve is fitted with the screw through the internal thread.

[0008] The braking mechanism includes two sets of support plates. One set of support plates is hinged to both sides of the guide sleeve, and the other set of support plates is hinged to both sides of the transmission piston. A clamp arm is installed at the lower part of each set of support plates. A brake block is installed at the lower end of the clamp arm, and a pin connection hole is provided in the middle of the clamp arm.

[0009] The support mechanism includes a retainer, which includes a vertically arranged mounting main plate. Two side connecting plates are fixedly connected to the mounting main plate. Each side connecting plate is symmetrically provided with two pin holes and two spring pin holes. The spring pin holes and pin holes are perpendicular to each other and connected. A bushing is installed in the pin hole. The clamp arm pin shaft passes through and is installed in the pin hole and bushing to connect the clamp arm to the retainer. A spring pin is installed in the spring pin hole and passes through the through hole on the clamp arm pin shaft and bushing to fix the clamp arm pin shaft in the retainer.

[0010] In the above technical solution, a transmission mechanism is set up, utilizing the principle of lead screw transmission. By rotating the lead screw in either the forward or reverse direction, the lead screw drives the transmission plug to slide back and forth within the guide sleeve, thereby moving the support plates connected to both sides, thus increasing or decreasing the distance between the two sets of support plates. At this time, since the clamp arm of the braking mechanism is connected to the retainer of the support mechanism via a clamp arm pin shaft, the distance between the two brake blocks at the lower end of the clamp arm increases or decreases simultaneously when the distance between the two sets of support plates increases or decreases. Thus, when the transmission plug approaches the guide sleeve, the two brake blocks also approach and clamp each other, realizing the braking function of the clamp arm on the brake disc, thereby ensuring that the chain tightening device can tighten the chain normally, and thus ensuring that the chain tightening work on site can be completed smoothly. Furthermore, by providing mutually perpendicular and interconnected spring pin holes and pin shaft holes on the side connecting plate of the cage, a clamp arm pin connecting shaft is fitted into the pin shaft hole, and a spring pin is fitted into the spring pin hole to fix the clamp arm pin connecting shaft, preventing it from rotating or dislodging from the pin shaft hole. This prevents the clamp arm from detaching from the cage and reduces mechanical friction between the clamp arm pin connecting shaft and the cage, increasing the stability and durability of the structural connection. Simultaneously, bushings are used to further reduce mechanical friction between the clamp arm pin connecting shaft and the cage.

[0011] Preferably, the lead screw sequentially includes a threaded fitting part, a limiting boss, a retaining sleeve connecting part, and a handwheel connecting part. The threaded fitting part is threadedly fitted to the telescopic inner sleeve, and the limiting boss is movably fitted in the limiting slot.

[0012] Preferably, the retaining sleeve connecting part is provided with a retaining sleeve pin connection hole, a retaining sleeve is fitted on the retaining sleeve connecting part, and a retaining sleeve connecting pin is fitted into the retaining sleeve pin connection hole and passes through the through hole on the retaining sleeve to connect the retaining sleeve to the lead screw.

[0013] Preferably, the end of the handwheel connecting part is provided with a bolt hole, the handwheel is sleeved on the handwheel connecting part, an end washer is provided on one side of the handwheel, and a fastening bolt is installed in the bolt hole to install the handwheel on the retaining sleeve.

[0014] In the above technical solution, the lead screw is designed as a segmented structure, which facilitates the stable installation of the retaining sleeve and the handwheel. The retaining sleeve can restrict the sliding of the guide sleeve on the lead screw, so as to ensure that the two sets of clamping arms can clamp the brake disc when they are close together, ensuring that the braking effect on the brake disc is stable and reliable, thereby ensuring that the chain tightening device can work normally.

[0015] Preferably, the mounting motherboard is a rectangular plate with a set of mounting motherboard mounting holes at both ends, and the side connecting plate is an isosceles trapezoidal plate with slots on both sides, and the opening of the spring pin hole is located in the slot.

[0016] In the above technical solution, it is convenient to fix the device on the brake disc of the power unit by installing the main board, and it is also convenient to insert the spring pin into the spring pin hole to fix the clamp arm pin joint shaft.

[0017] Preferably, both sides of the guide sleeve and the transmission plug are fixedly provided with support plate pin shafts, the upper part of the support plate is provided with support plate pin shaft holes, and the lower part of the support plate is provided with a set of clamp arm mounting holes, and the support plate pin shafts are rotatably fitted into the support plate pin shaft holes.

[0018] In the above technical solution, by setting support plate pin joints on both sides of the guide sleeve and the transmission plug, it is easy to connect the support plate with the guide sleeve and the transmission plug. When the transmission plug moves relative to the guide sleeve, the support plate can rotate around the support plate pin joint to drive the clamp arm to rotate.

[0019] Preferably, the clamp arm is inverted "L" shape, with a clamp arm connecting hole at the upper part, a limit bolt hole in the middle part, and a gate block mounting hole at the lower part. The clamp arm connecting bolt passes through and is fitted into the clamp arm mounting hole and the clamp arm connecting hole to fasten the clamp arm to the support plate. A limit bolt is fitted into the limit bolt hole, and a gate block mounting bolt is fitted into the gate block mounting hole to install the gate block at the lower part of the clamp arm.

[0020] In the above technical solution, the clamp arm's structure facilitates connection between its upper part and the support plate, and its middle part is hinged to the retainer. Furthermore, the opening distance of the clamp arm can be adjusted by adjusting the limit bolts, making it convenient to clamp different sizes and models of brake discs. The opening distance can be adjusted to be greater than the thickness of the brake disc to be clamped, thereby improving the ease of use of the chain tightening device and consequently increasing its working efficiency.

[0021] The beneficial effects of this utility model are as follows: The scraper conveyor gate disc tightening device of this utility model achieves the locking and braking function of the gate disc through the cooperation of the gate block and the gate disc, thereby ensuring that the tightening device can tighten the chain normally, and thus ensuring that the tightening work on site can be completed smoothly. In addition, the tightening braking device in this utility model does not require external power, has good operability and safety performance, and has a simple structure, low manufacturing cost, long service life, and is easy to use. Furthermore, since the opening distance is adjustable, it is convenient to clamp gate discs of different sizes and models. The opening distance can be adjusted to be greater than the thickness of the gate disc to be clamped, thereby improving the ease of use of the tightening device and thus improving the working efficiency of the tightening device. Attached Figure Description

[0022] Figure 1 This is a front view of the scraper conveyor gate disc tensioning device of this utility model;

[0023] Figure 2 This is a top half-sectional view of the scraper conveyor gate disc chain tensioning device of this utility model;

[0024] Figure 3 This is a right view of the scraper conveyor gate disc tensioning device of this utility model;

[0025] Figure 4 for Figure 2 Assembly drawing of the guide sleeve and the transmission plug;

[0026] Figure 5 for Figure 2 Front view of the lead screw;

[0027] Figure 6 for Figure 2 Front view of the middle cage;

[0028] Figure 7 for Figure 6 Top view of the middle cage;

[0029] Figure 8 for Figure 7 Right view of the middle cage;

[0030] Figure 9 for Figure 2 Front view of the middle clamp arm;

[0031] Figure 10 for Figure 2 Front view of the central support plate.

[0032] In the picture:

[0033] Transmission mechanism 1, guide sleeve 11, telescopic outer sleeve 11-1, limit slot 11-2, lead screw mounting hole 11-3, transmission plug 12, telescopic inner sleeve 12-1, lead screw 13, threaded fitting part 13-1, limit boss 13-2, stop sleeve connecting part 13-3, handwheel connecting part 13-4, stop sleeve pin connection hole 13-5, bolt hole 13-6, stop sleeve 14, stop sleeve connecting pin 15, handwheel 16, end washer 17, fastening bolt 18, support plate pin connection 19;

[0034] Braking mechanism 2, support plate 21, support plate pin hole 21-1, caliper arm mounting hole 21-2, caliper arm 22, pin connecting hole 22-1, caliper arm connecting hole 22-2, limit bolt hole 22-3, brake block mounting hole 22-4, brake block 23, caliper arm connecting bolt 24, limit bolt 25, brake block mounting bolt 26;

[0035] Support mechanism 3, retainer 31, mounting main board 31-1, side connecting plate 31-2, pin hole 31-3, spring pin hole 31-4, main board mounting hole 31-5, slot 31-6, bushing 32, clamp arm pin connecting shaft 33, spring pin 34. Detailed Implementation

[0036] To make the technical solution of this utility model easier to understand, the technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings and specific embodiments.

[0037] Example 1:

[0038] like Figures 1 to 3 As shown, a scraper conveyor brake disc chain tensioning device according to this embodiment includes a transmission mechanism 1, a braking mechanism 2, and a support mechanism 3, wherein:

[0039] The transmission mechanism 1 includes a guide sleeve 11 and a transmission plug 12. The guide sleeve 11 is provided with a telescopic outer sleeve 11-1, a limiting groove 11-2 and a lead screw mounting hole 11-3 in sequence. The lead screw 13 is rotatably fitted in the lead screw mounting hole 11-3. One end of the transmission plug 12 is provided with a telescopic inner sleeve 12-1. The inner wall of the telescopic inner sleeve 12-1 is provided with an internal thread. The telescopic inner sleeve 12-1 is movably fitted in the telescopic outer sleeve 11-1, and the telescopic inner sleeve 12-1 is fitted with the lead screw 13 through the internal thread.

[0040] The braking mechanism 2 includes two sets of support plates 21. One set of support plates 21 is hinged to both sides of the guide sleeve 11, and the other set of support plates 21 is hinged to both sides of the transmission plug 12. A clamp arm 22 is installed at the lower part of each set of support plates 21. A brake block 23 is installed at the lower end of the clamp arm 22. A pin connection hole 22-1 is provided in the middle of the clamp arm 22.

[0041] The support mechanism 3 includes a retainer 31, which includes a vertically arranged mounting plate 31-1. Two side connecting plates 31-2 are fixedly connected to the mounting plate 31-1. Each side connecting plate 31-2 is symmetrically provided with two pin holes 31-3 and two spring pin holes 31-4. The spring pin holes 31-4 and the pin holes 31-3 are perpendicular to each other and connected. A bushing 32 is installed in the pin hole 31-3. The clamp arm pin shaft 33 passes through and is installed in the pin hole 22-1 and the bushing 32 to connect the clamp arm 22 to the retainer 31. A spring pin 34 is installed in the spring pin hole 31-4 and passes through the through hole on the clamp arm pin shaft 33 and the bushing 32 to fix the clamp arm pin shaft 33 in the retainer 31.

[0042] Example 2:

[0043] like Figures 1 to 10 As shown, a scraper conveyor brake disc chain tensioning device according to this embodiment includes a transmission mechanism 1, a braking mechanism 2, and a support mechanism 3, wherein:

[0044] The lead screw 13 sequentially includes a threaded fitting part 13-1, a limiting boss 13-2, a retaining sleeve connecting part 13-3, and a handwheel connecting part 13-4. The threaded fitting part 13-1 is threadedly fitted to the telescopic inner sleeve 12-1, and the limiting boss 13-2 is movably fitted in the limiting slot 11-2.

[0045] The sleeve connecting part 13-3 is provided with a sleeve pin connection hole 13-5, and a sleeve 14 is sleeved on the sleeve connecting part 13-3. The sleeve connecting pin 15 is fitted into the sleeve pin connection hole 13-5 and passes through the through hole on the sleeve 14 to connect the sleeve 14 to the lead screw 13.

[0046] The end of the handwheel connecting part 13-4 is provided with a bolt hole 13-6, and a handwheel 16 is sleeved on the handwheel connecting part 13-4. An end washer 17 is provided on one side of the handwheel 16, and a fastening bolt 18 is installed in the bolt hole 13-5 to install the handwheel 16 on the retaining sleeve 14.

[0047] Example 3:

[0048] like Figures 1 to 10 As shown, a scraper conveyor brake disc chain tensioning device according to this embodiment includes a transmission mechanism 1, a braking mechanism 2, and a support mechanism 3, wherein:

[0049] The mounting motherboard 31-1 is a rectangular plate with a set of mounting motherboard mounting holes 31-5 at both ends. The side connecting plate 31-2 is an isosceles trapezoidal plate with slots 31-6 on both sides. The opening of the spring pin hole 31-4 is located in the slot 31-6.

[0050] Both sides of the guide sleeve 11 and the transmission plug 12 are fixedly provided with support plate pin shafts 19. The upper part of the support plate 21 is provided with a support plate pin shaft hole 21-1, and the lower part of the support plate 21 is provided with a set of clamp arm mounting holes 21-2. The support plate pin shaft 19 can be rotatably fitted into the support plate pin shaft hole 21-1.

[0051] The clamp arm 22 is inverted "L" shape, with a clamp arm connecting hole 22-2 at the upper part, a limiting bolt hole 22-3 in the middle part, and a gate block mounting hole 22-4 at the lower part. The clamp arm connecting bolt 24 passes through and is fitted into the clamp arm mounting hole 21-2 and the clamp arm connecting hole 22-2 to fasten the clamp arm 22 to the support plate 21. The limiting bolt hole 22-3 is fitted with a limiting bolt 25, and the gate block mounting hole 22-4 is fitted with a gate block mounting bolt 26 to install the gate block 23 at the lower part of the clamp arm 22.

[0052] The principle of this utility model:

[0053] This utility model discloses a scraper conveyor gate disc chain tensioning device used in scraper conveyor chain tensioning. The chain tensioning is accomplished jointly by the gate disc chain tensioning device and the chain stopper. Wherein:

[0054] The chain stopper is used to jam the scraper chain on the conveyor during the chain tightening process, thus tightening the chain. Place the chain stopper in the preset hole of the transition groove, reverse the machine slightly, and let the upper chain slowly move to the chain stopper. When it encounters mechanical resistance, the scraper is tightened. After the chain is connected, turn the handwheel counterclockwise to loosen the chain tightening device, turn on the power source, reverse the machine slightly, and then remove the chain stopper.

[0055] The chain tensioning device utilizes the rotational power provided by the conveyor's power unit to the sprocket shaft assembly to tension the scraper chain. When the scraper chain is at the appropriate tension, the chain tensioning device brakes the power unit's brake disc, keeping the scraper chain in a static tensioned state. Once the scraper chain disconnection point is closed, the brake disc is released, allowing the scraper chain to return to its free tensioned state, thus completing the chain tensioning process. The chain tensioning device is installed on the brake disc in the power unit, and its braking and releasing are controlled by the chain tensioning brake mechanism. Turning the handwheel clockwise causes the screw inside the guide sleeve to close the clamp arms, thus engaging the brake block to engage the brake disc and apply the braking effect. Conversely, turning the handwheel counterclockwise releases the handwheel, opening the clamp arms and releasing the brake.

[0056] Tightening chain steps:

[0057] 1. Install the brake disc tensioning device and chain stopper;

[0058] 2. Reverse jogging motor;

[0059] 3. When the chain tension is visually inspected and found to be appropriate, immediately turn the handwheel 16 on the chain tensioning brake device and simultaneously cut off the power supply to the motor. The brake mechanism 2 will then apply the brake disc.

[0060] When the handwheel 16 is turned, the lead screw 13 rotates as well. At this time, the transmission plug 12 moves closer to the guide sleeve 11 on the lead screw 13. The upper end of the clamp arm 22 is pulled closer by the support plate 21. At this time, the brake block 23 at the lower end of the clamp arm 22 also moves closer to each other, locking the brake disc and completing the braking.

[0061] 4. Use a suitable chain to form a closed loop with the scraper;

[0062] 5. Release the brake handwheel and wait for the scraper chain to stop completely before removing the chain stopper.

[0063] When the handwheel 16 is released in the opposite direction, the lead screw 13 rotates in the opposite direction. At this time, the transmission plug 12 moves away from the guide sleeve 11 on the lead screw 13. The upper end of the clamp arm 22 is pulled away from each other by the support plate 21. At this time, the brake block 23 at the lower end of the clamp arm 22 also moves away from each other, releasing the brake disc and releasing the brake.

[0064] 6. Start the conveyor head or tail motor and observe whether the chain tension is appropriate. Generally, it is advisable to have two slack rings below the sprocket.

[0065] It should be noted that the embodiments described herein are only some embodiments of this utility model, and not all implementations of this utility model. These embodiments are merely illustrative and are intended only to provide a more intuitive and clear way of understanding the content of this utility model, not to limit the technical solutions described herein. All other implementation methods that can be conceived by those skilled in the art without creative effort, as well as other simple substitutions and variations of the technical solutions of this utility model, without departing from the concept of this utility model, are within the protection scope of this utility model.

Claims

1. A chain tensioning device for a scraper conveyor gate disc, characterized in that, It includes a transmission mechanism (1), a braking mechanism (2), and a support mechanism (3), wherein: The transmission mechanism (1) includes a guide sleeve (11) and a transmission plug (12). The guide sleeve (11) is provided with a telescopic outer sleeve (11-1), a limiting groove (11-2) and a screw mounting hole (11-3) in sequence. The screw mounting hole (11-3) is rotatably fitted with a screw (13). One end of the transmission plug (12) is provided with a telescopic inner sleeve (12-1). The inner wall of the telescopic inner sleeve (12-1) is provided with an internal thread. The telescopic inner sleeve (12-1) is movably fitted inside the telescopic outer sleeve (11-1), and the telescopic inner sleeve (12-1) is fitted with the screw (13) through the internal thread. The braking mechanism (2) includes two sets of support plates (21), one set of support plates (21) is hinged to both sides of the guide sleeve (11), and the other set of support plates (21) is hinged to both sides of the transmission plug (12). A clamp arm (22) is installed at the lower part of each set of support plates (21), and a brake block (23) is installed at the lower end of the clamp arm (22). A pin connection hole (22-1) is provided in the middle of the clamp arm (22). The support mechanism (3) includes a retainer (31), which includes a vertically arranged mounting plate (31-1). Two side connecting plates (31-2) are fixedly connected to the mounting plate (31-1). Each side connecting plate (31-2) is symmetrically provided with two pin holes (31-3) and two spring pin holes (31-4). The spring pin holes (31-4) and the pin holes (31-3) are perpendicular to each other and connected. The pin hole (31-3) is fitted with a bushing (32), and the clamp arm pin shaft (33) is fitted through the pin hole (22-1) and the bushing (32) to connect the clamp arm (22) and the retainer (31). The spring pin hole (31-4) is fitted with a spring pin (34), and the spring pin (34) passes through the through hole on the clamp arm pin shaft (33) and the bushing (32) to fix the clamp arm pin shaft (33) in the retainer (31).

2. The scraper conveyor gate disc chain tensioning device as described in claim 1, characterized in that, The lead screw (13) includes, in sequence, a threaded fitting part (13-1), a limiting boss (13-2), a retaining sleeve connecting part (13-3), and a handwheel connecting part (13-4). The threaded fitting part (13-1) is threadedly fitted to the telescopic inner sleeve (12-1), and the limiting boss (13-2) is movably fitted in the limiting slot (11-2).

3. The scraper conveyor gate disc chain tensioning device as described in claim 2, characterized in that, The sleeve connecting part (13-3) is provided with a sleeve pin hole (13-5), and a sleeve (14) is fitted on the sleeve connecting part (13-3). The sleeve connecting pin (15) is fitted in the sleeve pin hole (13-5) and passes through the through hole on the sleeve (14) to connect the sleeve (14) to the lead screw (13).

4. The scraper conveyor gate disc chain tensioning device as described in claim 2, characterized in that, The end of the handwheel connecting part (13-4) is provided with a bolt hole (13-6), a handwheel (16) is fitted on the handwheel connecting part (13-4), an end washer (17) is provided on one side of the handwheel (16), a fastening bolt (18) is fitted in the bolt hole (13-6), and the handwheel (16) is installed on the retaining sleeve (14).

5. The scraper conveyor gate disc chain tensioning device as described in claim 1, characterized in that, The mounting motherboard (31-1) is a rectangular plate with a set of mounting motherboard mounting holes (31-5) at both ends. The side connecting plate (31-2) is an isosceles trapezoidal plate with slots (31-6) on both sides. The opening of the spring pin hole (31-4) is located in the slot (31-6).

6. The scraper conveyor gate disc chain tensioning device as described in claim 1, characterized in that, Both sides of the guide sleeve (11) and the transmission plug (12) are fixedly provided with support plate pin shafts (19). The upper part of the support plate (21) is provided with a support plate pin shaft hole (21-1), and the lower part of the support plate (21) is provided with a set of clamp arm mounting holes (21-2). The support plate pin shaft (19) can be rotatably fitted into the support plate pin shaft hole (21-1).

7. The scraper conveyor gate disc chain tensioning device as described in claim 1, characterized in that, The clamp arm (22) is inverted "L" shape. The upper part is provided with a clamp arm connecting hole (22-2), the middle part is provided with a limit bolt hole (22-3), and the lower part is provided with a gate block mounting hole (22-4). The clamp arm connecting bolt (24) is installed through the clamp arm mounting hole (21-2) and the clamp arm connecting hole (22-2) to fasten the clamp arm (22) to the support plate (21). The limit bolt hole (22-3) is equipped with a limit bolt (25), and the gate block mounting hole (22-4) is equipped with a gate block mounting bolt (26) to install the gate block (23) on the lower part of the clamp arm (22).

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