A belt conveyor idler frame structure

Abstract

This utility model relates to a belt conveyor idler frame structure, belonging to the technical field of belt conveyors. It includes a main support plate, two sets of side idler assemblies, and a set of bottom idler assemblies. The main support plate is fixedly connected to the upper end of a base frame. A secondary support plate is detachably connected to one side of the main support plate. Side idler mounting seats for installing the side idler assemblies are fixedly connected to the left and right sides of the upper surfaces of both the main and secondary support plates. This utility model, by installing a secondary support plate on one side of the main support plate and mounting spare side idler or spare bottom idler assemblies on the secondary support plate, provides temporary support for the belt, solving the problem of traditional belt conveyors requiring downtime when changing side or bottom idler bodies, thus significantly improving production efficiency. Furthermore, in this utility model, the tilt angle of the side idler frame is adjustable, allowing for flexible adjustment according to the actual conveying requirements of different materials.

Description

Technical Field

[0001] This utility model relates to the field of belt conveyor technology, and in particular to a belt conveyor idler frame structure. Background Technology

[0002] Belt conveyors are now widely used in material conveying systems in industries such as mining, metallurgy, and building materials. They are characterized by large conveying capacity and simple structure. Belt conveyors mainly come in structural forms such as trough belt conveyors and flat belt conveyors. They primarily consist of components such as a frame, belt idler frame, belt, and idlers. During production, due to process requirements, some belt conveyors operate continuously, necessitating good stability and minimal repair time in case of malfunction to avoid production disruptions.

[0003] The existing belt conveyor idler frame structure requires the machine to be stopped before replacing side or bottom idlers, which not only increases maintenance workload but also directly affects production continuity and efficiency. Secondly, the tilt angle of the side idlers in existing belt conveyor idler frames is usually fixed and cannot be adjusted according to the actual conveying requirements of different materials, resulting in poor adaptability. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this utility model provides a belt conveyor idler frame structure. The technical solution of this utility model is as follows:

[0005] A belt conveyor idler frame structure includes a main support plate, two sets of side idler assemblies, and a set of bottom idler assemblies. The main support plate is fixedly connected to the upper end of the base frame. A secondary support plate is detachably connected to one side of the main support plate. Side idler mounting seats for installing the side idler assemblies are fixedly connected to the left and right sides of the upper surface of the main support plate and the secondary support plate. Two sets of bottom idler mounting seats for installing the bottom idler assemblies are fixedly connected to the middle position of the upper surface of the main support plate and the secondary support plate.

[0006] The side roller assembly includes a base plate and an inverted U-shaped seat. The base plate is detachably connected to the upper end of the side roller mounting seat, and the inverted U-shaped seat is fixedly connected to the upper end of the base plate. A side roller frame is hinged to the upper surface of the inverted U-shaped seat and to one end near the bottom roller assembly. A side roller body is detachably connected inside the side roller frame. A movable ring is slidably sleeved on the outer side of the inverted U-shaped seat. A diagonal brace is hinged to the upper end of the movable ring. The upper end of the diagonal brace is hinged to the side roller frame. A driving component for driving the movable ring to move is connected inside the inverted U-shaped seat.

[0007] The bottom support roller assembly includes a U-shaped frame, which is detachably connected to the upper end of the bottom support roller mounting base. A bottom support roller frame is longitudinally slidably mounted on the upper end of the U-shaped frame. A bottom support roller body is detachably connected inside the bottom support roller frame. An adjuster for adjusting the height of the bottom support roller frame is connected to the lower end of the bottom support roller frame.

[0008] Optionally, the main support plate is symmetrically fixed with insert rails on its left and right sides, and the secondary support plate is symmetrically fixed with insert bars on its left and right sides. The insert bars slide within the insert rails on the corresponding side and are fixed together by bolts.

[0009] Optionally, the driving component includes a long threaded rod, which is rotatably connected inside the inverted U-shaped seat. One end of the long threaded rod rotatably passes through the side wall of the inverted U-shaped seat and is fixedly provided with an operating head. A movable seat is threadedly sleeved on the outer side of the long threaded rod. The movable seat is slidably disposed inside the inverted U-shaped seat, and the lower surface of the movable seat is fixedly connected to the movable ring.

[0010] Optionally, the inverted U-shaped seat is fixedly connected to side rails on both the front and rear sides, and the movable seat is fixedly connected to guide blocks on both the front and rear sides, with the guide blocks slidably connected inside the side rails on the corresponding side.

[0011] Optionally, a scale line is provided on one side of the transverse edge of the inverted U-shaped seat, and the scale line is used to indicate the displacement in conjunction with the movable ring.

[0012] Optionally, a limiting member for fixing the position of the movable ring is connected to one side of the movable ring. The limiting member includes an extension plate, which is fixedly connected to one side of the movable ring. A fixing bolt is threaded onto the extension plate. Multiple sets of limiting holes are equidistantly opened on the upper surface of the inverted U-shaped seat. The lower end of the fixing bolt passes through the extension plate and abuts against the limiting hole at the corresponding position.

[0013] Optionally, ear plates are symmetrically fixed on the front and rear sides of the substrate, and the ear plates are fixed to the side roller mounting base by bolts. A long slide bar is fixedly connected to the lower surface of the substrate, and a long slide groove is transversely opened on the side roller mounting base. A limit seat is fixedly connected to the side of the side roller mounting base near the bottom roller mounting base.

[0014] Optionally, guide grooves are provided on the upper surfaces of both sides of the U-shaped frame, and guide plates are fixedly connected to the left and right sides of the lower surface of the bottom roller frame. The guide plates are slidably disposed in the guide grooves on the corresponding sides. The adjuster includes a short threaded rod, the upper end of which is rotatably connected to the lower surface of the bottom roller frame. A threaded hole is provided through the center of the transverse side of the U-shaped frame, and the short threaded rod is threaded into the inside of the threaded hole. An elongated notch is provided in the middle of the side of the main support plate and the secondary support plate that are far apart from each other, and the elongated notch is located between the two sets of bottom roller mounting seats. The lower end of the short threaded rod passes through the elongated notch and extends to the bottom of the main support plate or the secondary support plate.

[0015] Optionally, short slide bars are fixedly connected to both sides of the lower surface of the U-shaped frame, and short slide grooves are opened on both sets of bottom roller mounting seats. The short slide grooves extend in the front-back direction and slide in cooperation with the corresponding short slide bars. A limiting seat two is fixedly connected to the side of the bottom roller mounting seat near the connection between the main support plate and the secondary support plate. A fixing block is fixed to the side of the short slide groove away from the limiting seat two by bolts. The short slide bar is sandwiched between the limiting seat two and the fixing block.

[0016] All of the above optional technical solutions can be combined arbitrarily, and this utility model does not provide a detailed description of the structure after each combination.

[0017] The beneficial effects of this utility model through the above solution are as follows:

[0018] 1. This utility model solves the problem of traditional belt conveyors requiring downtime when replacing side idlers or bottom idlers by installing a secondary support plate on one side of the main support plate, thus significantly improving production efficiency. Specifically, when replacing side idlers or bottom idlers, simply install the secondary support plate on one side of the main support plate, and then install the spare side idler assembly or spare bottom idler assembly on the secondary support plate. Next, adjust the spare side idler assembly or spare bottom idler assembly to the supported state, and then adjust the side idler assembly or bottom idler assembly to be replaced to the unsupported state, disengaging it from the belt, and then remove it from the side idler mounting base for replacement. The belt does not need to be stopped during the entire replacement process. This not only avoids production line stagnation caused by downtime but also greatly shortens maintenance time, reduces labor and equipment downtime costs, and further improves production efficiency.

[0019] 2. The tilt angle of the side idler frame in this utility model is adjustable, which can be flexibly adjusted according to the actual conveying requirements of different materials, thus enhancing its applicability. Specifically, the moving ring is driven by the driving component to slide along the inverted U-shaped seat. The moving ring drives the inclined support to move. At this time, the angle between the inclined support and the side idler frame changes, thereby achieving the purpose of adjusting the tilt angle of the side idler frame.

[0020] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall appearance of the belt conveyor idler frame structure provided by this utility model in use. Figure 1 ;

[0022] Figure 2 A schematic diagram of the overall appearance of the belt conveyor idler frame structure provided by this utility model in use. Figure 2 ;

[0023] Figure 3 This is an exploded structural diagram of the main support plate and the secondary support plate in this utility model;

[0024] Figure 4 This is a front sectional view of the main support plate, side roller assembly, bottom roller assembly, side roller mounting base and bottom roller mounting base in this utility model.

[0025] Figure 5 This is a right-side cross-sectional view of the main support plate, side roller assembly, bottom roller assembly, side roller mounting base and bottom roller mounting base in this utility model.

[0026] Figure 6 This is an exploded structural diagram of the main support plate, side roller assembly, bottom roller assembly, side roller mounting base and bottom roller mounting base in this utility model;

[0027] Figure 7 This is an exploded structural diagram of the side idler roller assembly of this utility model;

[0028] Figure 8 This is an exploded structural diagram of some components in the side idler roller assembly of this utility model;

[0029] Figure 9 This is an exploded structural diagram of the bottom roller assembly of this utility model.

[0030] The diagram labels are as follows: 1. Main support plate; 11. Insert rail; 12. Long notch; 2. Secondary support plate; 21. Insert strip; 3. Side roller assembly; 31. Base plate; 311. Ear plate; 32. Inverted U-shaped seat; 321. Limiting hole; 322. Side rail; 323. Scale line; 33. Side roller frame; 34. Side roller body; 35. Movable ring; 36. Diagonal brace; 37. Drive component; 371. Long threaded rod; 372. Moving seat; 3721. Guide block; 38. Limiting component; 381. Extension plate; 382. Fixing bolt; 39. Long slide bar; 4. Bottom roller assembly; 41. U-shaped frame; 411. Guide groove; 412. Threaded hole; 42. Bottom roller frame; 43. Guide plate; 44. Bottom roller body; 45. Short threaded rod; 46. Short slide bar; 5. Side roller mounting seat; 51. Long slide groove; 52. Limiting seat one; 6. Bottom roller mounting seat; 61. Short slide groove; 62. Limiting seat two; 63. Fixing block. Detailed Implementation

[0031] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0032] Please see Figure 1-9 This utility model provides a belt conveyor idler frame structure, including a main support plate 1, two sets of side idler assemblies 3 and a set of bottom idler assemblies 4. The main support plate 1 is fixedly connected to the upper end of the base frame. A secondary support plate 2 is detachably connected to one side of the main support plate 1. Side idler mounting seats 5 for installing the side idler assemblies 3 are fixedly connected to the left and right sides of the upper surface of the main support plate 1 and the secondary support plate 2. Two sets of bottom idler mounting seats 6 for installing the bottom idler assemblies 4 are fixedly connected to the middle position of the upper surface of the main support plate 1 and the secondary support plate 2.

[0033] The side roller assembly 3 includes a base plate 31 and an inverted U-shaped seat 32. The base plate 31 is detachably connected to the upper end of the side roller mounting seat 5. The inverted U-shaped seat 32 is fixedly connected to the upper end of the base plate 31. A side roller frame 33 is hinged to the upper surface of the inverted U-shaped seat 32 and to one end near the bottom roller assembly 4. A side roller body 34 is detachably connected inside the side roller frame 33. A movable ring 35 is slidably sleeved on the outer side of the inverted U-shaped seat 32. A diagonal brace 36 is hinged to the upper end of the movable ring 35. The upper end of the diagonal brace 36 is hinged to the side roller frame 33. A driving member 37 for driving the movable ring 35 to move is connected inside the inverted U-shaped seat 32.

[0034] The bottom roller assembly 4 includes a U-shaped frame 41, which is detachably connected to the upper end of the bottom roller mounting base 6. A bottom roller frame 42 is longitudinally slidably mounted on the upper end of the U-shaped frame 41. A bottom roller body 44 is detachably connected inside the bottom roller frame 42. An adjuster for adjusting the height of the bottom roller frame 42 is connected to the lower end of the bottom roller frame 42.

[0035] This invention solves the problem of traditional belt conveyors requiring downtime when replacing side idler rollers 34 or bottom idler rollers 44 by installing a secondary support plate 2 on one side of the main support plate 1, thus significantly improving production efficiency. The belt does not need to be stopped during the entire replacement process, which not only avoids production line stagnation caused by downtime but also greatly shortens maintenance time, reduces labor and equipment downtime costs, and further improves production efficiency.

[0036] In this invention, the tilt angle of the side idler frame 33 is adjustable, allowing for flexible adjustment based on the actual conveying requirements of different materials. Specifically, the moving ring 35 is driven by the drive component 37 to slide along the inverted U-shaped seat 32. The moving ring 35 drives the inclined support 36 to move, causing a change in the angle between the inclined support 36 and the side idler frame 33, thereby achieving the purpose of adjusting the tilt angle of the side idler frame 33.

[0037] Specifically, the relative height of the bottom roller frame 42 within the U-shaped frame 41 can be adjusted using the adjuster.

[0038] Steps for replacing the idler roller:

[0039] First, install the secondary support plate 2 on one side of the main support plate 1, and then install the spare side roller assembly 3 or the spare bottom roller assembly 4 on the side roller mounting seat 5 or the bottom roller mounting seat 6 on the secondary support plate 2.

[0040] The second step is to adjust the spare side idler assembly 3 or the spare bottom idler assembly 4 to a supported position, ensuring it contacts the belt and provides effective support. During adjustment, the tilt angle of the side idler frame 33 in the spare side idler assembly 3 on the auxiliary support plate 2 needs to be adjusted to match the tilt angle of the original side idler frame 33. The height of the bottom idler frame 42 in the spare bottom idler assembly 4 on the auxiliary support plate 2 needs to be adjusted to match the height of the original bottom idler frame 42. At this point, the spare side idler body 34 or the spare bottom idler body 44 begins to provide effective support to the belt.

[0041] The third step is to adjust the side roller assembly 3 or bottom roller assembly 4 that needs to be replaced on the main support plate 1 to a non-supported state so that it is out of contact with the belt, and then remove it from the side roller mounting seat 5 or bottom roller mounting seat 6.

[0042] Fourth, install the new side idler assembly 3 or bottom idler assembly 4 onto the side idler mounting base 5 or bottom idler mounting base 6 on the main support plate 1. Then adjust the state of its side idler body 34 or bottom idler body 44 so that it contacts the belt and operates.

[0043] Fifth, adjust the spare side idler assembly 3 or spare bottom idler assembly 4 on the auxiliary support plate 2 to a non-supported state, so that it is out of contact with the belt. Then remove it from the side idler mounting seat 5 or bottom idler mounting seat 6, and finally remove the auxiliary support plate 2 from one side of the main support plate 1.

[0044] Furthermore, the main support plate 1 is symmetrically fixed with insert rails 11 on the left and right sides, and the secondary support plate 2 is symmetrically fixed with insert strips 21 on the left and right sides. The insert strips 21 are slidably installed in the insert rails 11 on the corresponding side and the two are fixed together by bolts.

[0045] Specifically, when it is necessary to replace the idler roller body, the auxiliary support plate 2 needs to be installed on one side of the main support plate 1 first. The specific installation method is to insert the inserts 21 on the left and right sides of the auxiliary support plate 2 into the corresponding side rails 11 and fix them with bolts.

[0046] Furthermore, the drive component 37 includes a long threaded rod 371, which is rotatably connected to the inside of the inverted U-shaped seat 32. One end of the long threaded rod 371 rotatably passes through the side wall of the inverted U-shaped seat 32 and is fixedly provided with an operating head. The outer thread of the long threaded rod 371 is threadedly fitted with a movable seat 372, which is slidably disposed inside the inverted U-shaped seat 32. The lower surface of the movable seat 372 is fixedly connected to the movable ring 35.

[0047] Specifically, when it is necessary to change the tilt angle of the side idler frame 33, the long threaded rod 371 can be rotated by the operating head. At this time, the movable seat 372 slides along the inverted U-shaped seat 32, and the movable seat 372 drives the movable ring 35 to slide. The movable ring 35 drives the inclined support 36 to move, so that the angle between the inclined support 36 and the side idler frame 33 changes, thereby achieving the purpose of adjusting the tilt angle of the side idler frame 33. In addition, the opening of the inverted U-shaped seat 32 faces downward, which can prevent material on the belt from falling into the inverted U-shaped seat 32 and prevent the accumulation of material from interfering with the sliding of the movable seat 372.

[0048] Furthermore, the front and rear sides of the inverted U-shaped seat 32 are fixedly connected to side rails 322, and the front and rear sides of the movable seat 372 are fixedly connected to guide blocks 3721, which are slidably connected inside the side rails 322 on the corresponding side.

[0049] Specifically, when the movable seat 372 is slid, the movable seat 372 drives the guide block 3721 to slide within the side rail 322 on the corresponding side. The side rail 322 plays a role in limiting and guiding the guide block 3721, ensuring that the movable seat 372 can slide along the predetermined path.

[0050] Furthermore, a scale line 323 is provided on one side of the transverse edge of the inverted U-shaped seat 32. The scale line 323 is used to cooperate with the movable ring 35 to indicate the displacement.

[0051] Specifically, during the adjustment process, the actual position of the movable ring 35 can be adjusted according to the indication of the scale line 323, making the adjustment more precise. Secondly, when replacing the side idler roller 34, the position of the movable ring 35 can also be determined by the indication of the scale line 323. By adjusting the position of the movable ring 35 in the spare side idler roller assembly 3 according to the scale line 323 indicated by the movable ring 35 in the original side idler roller assembly 3, it can be ensured that the adjusted spare side idler roller 34 maintains the same tilt angle as the original side idler roller 34. By setting the scale line 323 to indicate the position, repeated measurements or adjustments are unnecessary during the replacement process, allowing for efficient and accurate adjustment of the tilt angle.

[0052] Furthermore, a limiting member 38 for fixing the position of the movable ring 35 is connected to one side of the movable ring 35. The limiting member 38 includes an extension plate 381, which is fixedly connected to one side of the movable ring 35. A fixing bolt 382 is threaded onto the extension plate 381. Multiple sets of limiting holes 321 are equidistantly opened on the upper surface of the inverted U-shaped seat 32. The lower end of the fixing bolt 382 passes through the extension plate 381 and abuts against the limiting hole 321 at the corresponding position.

[0053] Specifically, after the position of the movable ring 35 is adjusted, the fixing bolt 382 is tightened, and its lower end passes through the extension plate 381 and abuts against the corresponding limiting hole 321. At this time, the position of the movable ring 35 is firmly fixed on the inverted U-shaped seat 32, thereby ensuring that the tilt angle of the side roller frame 33 will not change due to external force, and ensuring the normal operation of the belt.

[0054] Furthermore, ear plates 311 are symmetrically fixed on the front and rear sides of the substrate 31. The ear plates 311 are fixed to the side roller mounting seat 5 by bolts. A long slide bar 39 is fixedly connected to the lower surface of the substrate 31. A long slide groove 51 is transversely opened on the side roller mounting seat 5. A limit seat 52 is fixedly connected to the side of the side roller mounting seat 5 near the bottom roller mounting seat 6.

[0055] Specifically, when installing the side roller assembly 3, simply align the long slide bar 39 with the long slide groove 51 and insert it. After insertion, fix the ear plate 311 to the side roller mounting base 5 with bolts.

[0056] Furthermore, guide grooves 411 are provided on the upper surfaces of both sides of the U-shaped frame 41, and guide plates 43 are fixedly connected to the left and right sides of the lower surface of the bottom roller frame 42. The guide plates 43 are slidably disposed inside the guide grooves 411 on the corresponding side. The adjuster includes a short threaded rod 45. The upper end of the short threaded rod 45 is rotatably connected to the lower surface of the bottom roller frame 42. A threaded hole 412 is provided through the center of the transverse side of the U-shaped frame 41. The short threaded rod 45 is threadedly connected inside the threaded hole 412. An elongated notch 12 is provided in the middle of the side of the main support plate 1 and the secondary support plate 2 that are far apart. The elongated notch 12 is located between the two sets of bottom roller mounting seats 6. The lower end of the short threaded rod 45 passes through the elongated notch 12 and extends to the bottom of the main support plate 1 or the secondary support plate 2.

[0057] Specifically, when disassembling the original bottom roller assembly 4, simply rotate the short threaded rod 45 manually. The short threaded rod 45 engages with the threaded hole 412. As the short threaded rod 45 rotates, it drives the bottom roller frame 42 downwards, thereby disengaging the bottom roller body 44 from the belt. Then, the U-shaped frame 41 can be removed from the bottom roller mounting base 6. The disassembly process is simple and convenient. During the removal of the U-shaped frame 41, the short threaded rod 45 can be easily removed from the elongated notch 12.

[0058] Furthermore, short slide bars 46 are fixedly connected to both sides of the lower surface of the U-shaped frame 41, and short slide grooves 61 are opened on both sets of bottom roller mounting seats 6. The short slide grooves 61 extend in the front-back direction and slide in cooperation with the corresponding short slide bars 46. A limit seat 2 62 is fixedly connected to the side of the bottom roller mounting seat 6 near the connection between the main support plate 1 and the secondary support plate 2. A fixing block 63 is fixed to the side of the short slide groove 61 away from the limit seat 2 62 by bolts. The short slide bars 46 are sandwiched between the limit seat 2 62 and the fixing block 63.

[0059] Specifically, when installing the bottom roller assembly 4, simply align the short slide bar 46 with the short slide groove 61 and insert it. After insertion, insert the fixing block 63 into the short slide groove 61. At this time, the short slide bar 46 is clamped between the limit seat 62 and the fixing block 63. Finally, fix the fixing block 63 to the bottom roller mounting seat 6 with bolts.

[0060] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A belt conveyor idler frame structure, characterized in that: It includes a main support plate (1), two sets of side roller assemblies (3) and a set of bottom roller assemblies (4). The main support plate (1) is fixedly connected to the upper end of the base frame. A secondary support plate (2) is detachably connected to one side of the main support plate (1). Side roller mounting seats (5) for installing the side roller assemblies (3) are fixedly connected to the left and right sides of the upper surface of the main support plate (1) and the secondary support plate (2). Two sets of bottom roller mounting seats (6) for installing the bottom roller assemblies (4) are fixedly connected to the middle position of the upper surface of the main support plate (1) and the secondary support plate (2). The side roller assembly (3) includes a base plate (31) and an inverted U-shaped seat (32). The base plate (31) is detachably connected to the upper end of the side roller mounting seat (5). The inverted U-shaped seat (32) is fixedly connected to the upper end of the base plate (31). A side roller frame (33) is hinged to the upper surface of the inverted U-shaped seat (32) and to one end near the bottom roller assembly (4). A side roller body (34) is detachably connected inside the side roller frame (33). A movable ring (35) is slidably sleeved on the outer side of the inverted U-shaped seat (32). A diagonal brace (36) is hinged to the upper end of the movable ring (35). The upper end of the diagonal brace (36) is hinged to the side roller frame (33). A driving component (37) for driving the movable ring (35) to move is connected inside the inverted U-shaped seat (32). The bottom roller assembly (4) includes a U-shaped frame (41), which is detachably connected to the upper end of the bottom roller mounting base (6). A bottom roller frame (42) is longitudinally slidably mounted on the upper end of the U-shaped frame (41). A bottom roller body (44) is detachably connected inside the bottom roller frame (42). An adjuster for adjusting the height of the bottom roller frame (42) is connected to the lower end of the bottom roller frame (42).

2. The belt conveyor idler frame structure according to claim 1, characterized in that, The main support plate (1) is symmetrically fixed with insert rails (11) on the left and right sides, and the auxiliary support plate (2) is symmetrically fixed with insert strips (21) on the left and right sides. The insert strips (21) are slidably installed in the insert rails (11) on the corresponding side and are fixed together by bolts.

3. The belt conveyor idler frame structure according to claim 1, characterized in that, The drive component (37) includes a long threaded rod (371), which is rotatably connected to the inside of the inverted U-shaped seat (32). One end of the long threaded rod (371) rotatably passes through the side wall of the inverted U-shaped seat (32) and is fixedly provided with an operating head. The outer thread of the long threaded rod (371) is threaded with a movable seat (372), which is slidably disposed inside the inverted U-shaped seat (32). The lower surface of the movable seat (372) is fixedly connected to the movable ring (35).

4. The belt conveyor idler frame structure according to claim 3, characterized in that, The inverted U-shaped seat (32) is fixedly connected to the front and rear sides of the side rail (322), and the movable seat (372) is fixedly connected to the front and rear sides of the guide block (3721). The guide block (3721) is slidably connected inside the side rail (322) on the corresponding side.

5. The belt conveyor idler frame structure according to claim 4, characterized in that, The inverted U-shaped seat (32) has a scale line (323) on one side of its lateral edge. The scale line (323) is used to cooperate with the movable ring (35) to indicate the displacement.

6. The belt conveyor idler frame structure according to claim 5, characterized in that, One side of the movable ring (35) is connected to a limiting member (38) for fixing the position of the movable ring (35). The limiting member (38) includes an extension plate (381). The extension plate (381) is fixedly connected to one side of the movable ring (35). A fixing bolt (382) is threaded onto the extension plate (381). Multiple sets of limiting holes (321) are equidistantly opened on the upper surface of the inverted U-shaped seat (32). The lower end of the fixing bolt (382) passes through the extension plate (381) and abuts against the limiting hole (321) at the corresponding position.

7. The belt conveyor idler frame structure according to claim 1, characterized in that, The base plate (31) is symmetrically provided with ear plates (311) on the front and rear sides. The ear plates (311) are fixed to the side roller mounting seat (5) by bolts. A long slide bar (39) is fixedly connected to the lower surface of the base plate (31). A long slide groove (51) is opened horizontally through the side roller mounting seat (5). A limit seat (52) is fixedly connected to the side of the side roller mounting seat (5) near the bottom roller mounting seat (6).

8. The belt conveyor idler frame structure according to claim 1, characterized in that, The upper surfaces of both sides of the U-shaped frame (41) are provided with guide grooves (411). The lower surfaces of the bottom roller frame (42) are fixedly connected with guide plates (43) on both sides. The guide plates (43) are slidably disposed in the guide grooves (411) on the corresponding side. The adjuster includes a short threaded rod (45). The upper end of the short threaded rod (45) is rotatably connected to the lower surface of the bottom roller frame (42). A threaded hole (412) is provided through the center of the transverse side of the U-shaped frame (41). The short threaded rod (45) is threadedly connected to the inside of the threaded hole (412). The middle position of the side of the main support plate (1) and the secondary support plate (2) that are far apart is provided with an elongated notch (12). The elongated notch (12) is located between the two sets of bottom roller mounting seats (6). The lower end of the short threaded rod (45) passes through the elongated notch (12) and extends to the bottom of the main support plate (1) or the secondary support plate (2).

9. A belt conveyor idler frame structure according to claim 8, characterized in that, Short slide bars (46) are fixedly connected to both sides of the lower surface of the U-shaped frame (41). Short slide grooves (61) are provided on both sets of bottom roller mounting seats (6). The short slide grooves (61) extend in the front-back direction and slide in cooperation with the corresponding short slide bars (46). A limit seat two (62) is fixedly connected to the side of the bottom roller mounting seat (6) near the connection between the main support plate (1) and the auxiliary support plate (2). A fixing block (63) is fixed to the side of the short slide groove (61) away from the limit seat two (62) by bolts. The short slide bar (46) is sandwiched between the limit seat two (62) and the fixing block (63).

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