Adjusting device for large-scale transport belt transmission roller

Abstract

The invention discloses a large-scale transport belt transmission roller adjusting device. The device comprises a supporting base; the roller adjusting frame is arranged at the top end of the supporting base, and a belt transmission roller is installed on the roller adjusting frame; one end of the adjusting lever is fixedly connected with one side end of the roller adjusting frame, and the other end of the adjusting lever is a pushing end; and the locking assembly is fixed to the supporting base and located on one side of the roller adjusting frame, and the adjusting lever can be locked and fixed through the locking assembly. According to the device, through the lever principle, huge adjusting force acting on the heavy roller is converted into relatively small operating force applied to the pushing end of the lever, the labor intensity is remarkably reduced, and single-person adjustment becomes possible.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor equipment technology, and more specifically to a large conveyor belt drive roller adjustment device. Background Technology

[0002] Large conveyor belts are widely used in industries such as mining, ports, metallurgy, and building materials for the long-distance continuous transport of bulk materials. As the core driving component of the conveyor belt, the installation angle and positional accuracy of the drive roller directly affect the belt's operational stability. If the drive roller is misaligned or angular deviation occurs during operation, it can easily lead to belt misalignment, causing material spillage, accelerated belt wear, equipment malfunctions, and downtime, severely impacting transport efficiency and increasing maintenance costs.

[0003] In existing technologies, drive rollers are typically mounted on the frame via fixed bearing seats. Adjusting the bearing seat position mainly relies on adding or removing shims or fine-tuning with bolts, which has the following drawbacks: 1. Poor adjustment flexibility: It cannot achieve precise adjustment of the drive roller at any angle, and its effect on correcting belt misalignment is limited; 2. Cumbersome adjustment process: It requires disassembling multiple fixing bolts, making operation difficult and consuming manpower and time; 3. Lack of labor-saving design: For large drive rollers, manual adjustment is labor-intensive; 4. Insufficient fixing reliability: After adjustment, there is a lack of a reliable locking structure, and the position is easily shifted due to vibration during equipment operation, affecting the durability of the adjustment effect; 5. Adjusting the tension of the conveyor belt often requires manual back-and-forth movement of the heavy drive roller, which is time-consuming, labor-intensive, and inconvenient. Summary of the Invention To solve at least one of the above-mentioned technical problems, the present invention provides a large conveyor belt drive roller adjustment device that is flexible in adjustment, simple and labor-saving in operation, highly accurate and convenient in adjusting belt tension.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A large conveyor belt drive roller adjustment device includes: Support base; A roller adjusting frame is placed on top of the support base, and a belt-driven roller is installed on the roller adjusting frame; An adjusting lever, one end of which is fixedly connected to one side of the roller adjusting frame, and the other end of which is a pushing end; A locking assembly is fixed on the support base and located on one side of the roller adjustment frame. The adjustment lever can be locked and fixed by the locking assembly.

[0005] The technical effects of the above technical solution are: Integrated adjustment: The roller mounting bracket, lever and lock are integrated into a single unit, changing the traditional adjustment mode that relies on multiple scattered bolts and shims.

[0006] Labor-saving operation: By using the lever principle, the huge adjustment force acting on the heavy roller is transformed into a relatively small operating force applied at the lever push end, which significantly reduces labor intensity and makes single-person adjustment possible.

[0007] Flexible and precise: The continuous swing of the lever allows for stepless and fine-tuning of the roller angle, which can more accurately match and correct the belt deviation trend, solving the problem of "fixed adjustment amount and low precision" in the traditional method.

[0008] Furthermore, two guide rails are arranged parallel to each other at intervals on the support base; The roller adjusting frame includes: The frame has casters installed on both its left and right sides, which can move back and forth and left and right on the guide rail. One end of the frame is fixedly connected to one end of the adjusting lever. The support bearing housing consists of two bearing housings, which are respectively fixed on the left and right sides of the frame. The two ends of the belt drive roller axle can be fixedly connected to the inner rings of the bearings on the two support bearing housings.

[0009] The technical effects of the above technical solution are: The physical basis for angle adjustment is that the characteristic of the movable wheel being able to move left and right on the guide rail (actually a tiny rotation around the contact point) is the structural premise for the lever to be able to pry the entire adjustment frame, thereby changing the angle of the roller.

[0010] Precise guidance: The guide rail provides a straight and stable path for the back and forth movement of the roller adjustment frame, ensuring that the roller axis can remain parallel when the belt is tensioned, and avoiding new deviations caused by offset.

[0011] Low-resistance movement: The moving wheel changes sliding friction into rolling friction, which greatly reduces movement resistance and makes the operation easier, especially when adjusting tension by moving back and forth.

[0012] Furthermore, the guide rail is provided with a plurality of locking holes spaced apart along its length, and locking rods are fixed on both the left and right sides of the frame. The locking rods are provided with through holes, and the first locking pins are inserted into the corresponding locking holes and through holes.

[0013] The technical effects of the above technical solution are: Reliable fixing: After the front and rear position (tension) adjustment is completed, the first locking pin can mechanically and rigidly lock the frame in a specific position on the guide rail, preventing the roller from accidentally moving backward due to belt tension or vibration during operation, and ensuring stable tension.

[0014] Simple to operate: Inserting and removing the locking pin is much faster and simpler than repeatedly tightening multiple large bolts.

[0015] Furthermore, the locking rod is provided with a sliding groove, which is slidably connected to the guide rail.

[0016] The technical effect of the above solution is to reduce the risk of derailment and make the movement smoother during forward and backward movement and angle adjustment.

[0017] Furthermore, the adjusting lever includes: The main rod has one end fixedly connected to one side of the frame, and the other end has an insertion interface. Multiple adjustment holes are spaced apart on both sides of the insertion interface. The main rod can be locked and fixed by the locking assembly. An extension rod is provided, with a plug-in block fixed at one end. The plug-in block can be inserted into the plug-in interface. Multiple positioning holes are provided on the side wall of the plug-in block. A second locking pin passes through the corresponding adjustment hole and positioning hole. The other end of the extension rod is the pushing end, and the outer wall surface of the pushing end is provided with an anti-slip surface.

[0018] The technical effects of the above technical solution are: Variable lever arm, super labor-saving: By adding an extension rod, the lever arm is greatly extended. Based on the lever principle, it can amplify the force applied by the operator several times, making the adjustment of extra-large rollers exceptionally labor-saving.

[0019] Highly adaptable: Depending on the available space and required adjustment force, the use of an extension pole, and the length of the extension pole, can be flexibly selected to adapt to different machine sizes and working conditions.

[0020] Safe and convenient to operate: The non-slip surface ensures that the operator will not slip when applying force, thus improving safety.

[0021] Furthermore, the locking assembly includes: A locking screw, which is fixed to the first crossbeam on the support base by a support block, and the main rod is attached to the locking screw; The locking nuts consist of two screws screwed onto the locking screw, with the two locking nuts located on the left and right sides of the main rod respectively, for clamping and fixing the main rod, and elastic washers are pressed between the two sides of the main rod and the two locking nuts respectively.

[0022] The technical effects of the above technical solution are: Stepless locking and angle holding: The locking method of double nuts and screws can achieve continuous and stepless locking and fixing of the main rod, and can accurately lock the roller at any fine-tuned angle with strong locking force.

[0023] Vibration and loosening prevention: The application of elastic washers (such as spring washers) can effectively resist vibrations during long-term operation of the equipment, prevent the locking nut from loosening on its own, and ensure the long-term durability of the angle adjustment effect.

[0024] Furthermore, the first crossbeam is provided with angle scale markings for indicating the adjustment angle of the belt drive roller.

[0025] The technical effects of the above technical solution are: Quantitative adjustment: This transforms intuitive, experience-based adjustments into quantifiable, readable operations. Operators can record the angle at which the belt operates optimally.

[0026] Improved efficiency: During subsequent maintenance or re-adjustment, the angle can be quickly and accurately restored to the optimal position without repeated trial and error, greatly improving maintenance efficiency.

[0027] Furthermore, it also includes: a counterweight tensioning mechanism, which comprises: The first fixed pulley group is fixed to the frame; The second fixed pulley assembly is fixed on the second crossbeam on the support base and is located on one side of the frame; The third fixed pulley group is fixed above the second fixed pulley group by a support frame; A steel wire rope is wound around the first fixed pulley group, the second fixed pulley group, and the third fixed pulley group, and counterweights are connected to both ends of the steel wire rope.

[0028] The technical effects of the above technical solution are: When adjusting tension, the tension on the frame can be actively controlled by adding or removing counterweights. When the belt needs to be tightened, adding counterweights can help pull the frame forward; when it needs to be loosened, removing counterweights can move the frame backward. This transforms tension adjustment from a purely manual operation to a semi-automatic, controllable, and labor-saving operation.

[0029] Furthermore, the counterweight includes: A horizontal suspension plate, which is fixedly connected to both ends of the wire rope; Two vertical suspension rods are provided, and their upper ends are fixedly connected to the horizontal suspension plate. A support plate, wherein the support plate is fixedly connected to the lower ends of both vertical suspension rods; A counterweight, wherein there are multiple counterweights, which are stacked on the support plate.

[0030] The technical effects of the above technical solution are: Easy to adjust: The counterweight tension can be continuously and precisely adjusted by simply adding or removing standardized counterweights to adapt to different belt tension requirements or equipment conditions.

[0031] Stable structure: The design of the vertical suspension rod and support plate makes the counterweights stack stably and neatly, not easy to fall off, and safe and reliable.

[0032] Furthermore, two lateral limiting notches are provided on one side of the counterweight block, and the two vertical lifting rods are respectively inserted into the corresponding lateral limiting notches.

[0033] The technical effects of the above technical solution are: Preventing lateral slippage: The lateral limiting notch effectively prevents the counterweight from moving or rotating in the horizontal direction, ensuring that the stacked center of gravity remains stable.

[0034] Ensuring safety: This structure prevents the counterweight from accidentally slipping off the support plate when the equipment is operating and may experience slight vibrations, thus eliminating potential safety hazards.

[0035] In summary, the beneficial effects of this invention are: 1. Flexible and precise adjustment: By using the lever principle to drive the roller adjustment frame, the angle of the transmission roller can be continuously and precisely finely adjusted, effectively correcting belt misalignment.

[0036] 2. Simple and labor-saving operation: The lever mechanism greatly reduces the operating force required to adjust the heavy roller, which can be completed by a single person. Moreover, the design of the extended rod further amplifies the adjustment lever arm.

[0037] 3. Reliable Fixation: The main rod is clamped and fixed by a locking nut and an elastic washer. Combined with the cooperation of the locking rod and the locking hole, it can effectively resist the vibration during equipment operation and prevent the position from shifting after adjustment.

[0038] 4. Convenient belt tension adjustment: The counterweight tensioning mechanism can provide a stable reverse tension, which can balance part of the equipment load on the one hand, and when adjusting the tension, the roller movement can be achieved more effortlessly and more smoothly by adding or removing counterweights. It is especially suitable for tension adjustment of ultra-large belt conveyors. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0040] Figure 1 A schematic diagram of a large conveyor belt drive roller adjustment device provided by the present invention.

[0041] Figure 2 A schematic diagram of the framework provided by the present invention.

[0042] Figure 3 This is a schematic diagram of the exploded structure of the main rod and extension rod provided by the present invention.

[0043] Figure 4 This is a top view of the locking assembly provided by the present invention.

[0044] Figure 5 This is a top view of the structure when the counterweight and the vertical lifting rod are in conjunction, as provided by the present invention.

[0045] Figure label: 1-Support base, 11-Guide rail, 111-Locking hole, 12-First crossbeam, 121-Angle scale marking line, 13-Second crossbeam, 2-Roller adjustment frame, 21-Frame, 211-Locking rod, 2111-Through hole, 2112-Slide groove, 22-Moving wheel, 23-Support bearing seat, 3-Belt driven roller, 4-Adjusting lever, 41-Main rod, 411-Insertion interface, 4111-Adjusting hole, 42-Extension rod, 421-Insertion block 4211-Positioning hole, 422-Anti-slip surface, 5-Locking assembly, 51-Locking screw, 52-Support block, 53-Locking nut, 54-Elastic washer, 6-Counterweight tensioning mechanism, 61-First fixed pulley group, 62-Second fixed pulley group, 63-Third fixed pulley group, 64-Support frame, 65-Wire rope, 66-Counterweight, 661-Horizontal hanging plate, 662-Vertical hanging rod, 663-Support plate, 664-Counterweight block, 6641-Horizontal limiting notch. Detailed Implementation

[0046] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] like Figures 1-5 As shown, an embodiment of the present invention discloses a large conveyor belt drive roller adjustment device, comprising: Support base 1; Roller adjusting frame 2 is placed on top of support base 1, and belt-driven roller 3 is installed on roller adjusting frame 2; Adjusting lever 4, one end of which is fixedly connected to one side of the roller adjusting frame 2, and the other end of the adjusting lever 4 is the pushing end; Locking component 5 is fixed on the support base 1 and located on one side of the roller adjustment frame 2. The adjustment lever 4 can be locked and fixed by locking component 5.

[0048] In some embodiments, two guide rails 11 are arranged parallel to each other at intervals on the support base 1; The roller adjusting frame 2 includes: The frame 21 has casters 22 installed on both the left and right sides. The casters 22 can move back and forth and left and right on the guide rail 11. One end of the frame 21 is fixedly connected to one end of the adjusting lever 4. There are two support bearing seats 23, which are fixed on the left and right sides of the frame 21 respectively. The two ends of the axle of the belt drive roller 3 can be fixedly connected to the inner rings of the bearings on the two support bearing seats 23 respectively.

[0049] The bearing housing 23 is a bearing housing with an oil injection hole. Every 3 months, 3# lithium-based grease can be injected into the bearing through the oil injection nozzle of the lubrication mechanism. After oil injection, tighten the sealing plug to maintain the rotation performance and service life of the bearing.

[0050] Multiple locking holes 111 are spaced apart along the length of the guide rail 11. Locking rods 211 are fixed on both the left and right sides of the frame 21. Through holes 2111 are opened on the locking rods 211. The first locking pin passes through the corresponding locking holes 111 and through holes 2111.

[0051] In some embodiments, the locking rod 211 is provided with a sliding groove 2112, which is slidably connected to the guide rail 11. There is a certain gap between the sliding groove and the guide rail to facilitate the left and right movement of the frame.

[0052] In some embodiments, the adjusting lever 4 includes: The main rod 41 (made of rectangular steel, which reduces the overall weight while ensuring structural strength) is fixedly connected to one side of the frame 21 at one end, and has an insertion interface 411 at the other end. Multiple adjustment holes 4111 are spaced apart on both sides of the insertion interface 411. The main rod 41 can be locked and fixed by the locking assembly 5. The extension rod 42 (which is a rectangular steel rod) has a plug-in block 421 fixed at one end. The plug-in block 421 can be plugged into the plug-in interface 411. Multiple positioning holes 4211 are provided on the side wall of the plug-in block 421. The second locking pin passes through the corresponding adjustment hole 4111 and positioning hole 4211. The length of the lever can be adjusted according to the needs to achieve different labor-saving multiples (the maximum labor-saving multiple can reach 10 times). The other end of the extension rod 42 is a pushing end. The outer wall surface of the pushing end is provided with an anti-slip surface 422 (which has anti-slip textures or anti-slip protrusions and other friction structures).

[0053] In some embodiments, the locking component 5 includes: Locking screw 51 (can be M16 high-strength bolt (80mm in length)) is fixed to the first crossbeam 12 on the support base 1 by the support block 52, and the main rod 41 is attached to the locking screw 51. Two locking nuts 53 (M16 anti-loosening nuts can be used) are screwed onto the locking screw 51, and the two locking nuts 53 are located on the left and right sides of the main rod 41 respectively, used to clamp and fix the main rod 41. Elastic washers 54 (M16 spring washers can be used) are pressed between the two sides of the main rod 41 and the two locking nuts 53. This generates a preload force through the elastic deformation of the elastic washers, further enhancing the reliability of the main rod locking. The first crossbeam 12 has an angle scale marking line 121 processed by laser engraving to indicate the adjustment angle of the belt drive roller 3. Its range is -30° to +30° and the graduation value is 0.5°.

[0054] The angle adjustment of the belt-driven roller 3 in this device, i.e., the correction adjustment process: First, remove the first locking pin and loosen the locking nut 53. Then, apply a force to the left or right at the pushing end of the adjusting lever 4 (an extension rod 42 can be installed to save effort). Since the frame 21 is supported on the guide rail 11 by the moving wheel 22, the applied force will cause it to rotate around the contact point of the moving wheel 22, thereby causing the belt drive roller 3 fixed on the support bearing seat 23 to deflect at an angle, changing its axial direction and achieving the purpose of correcting belt misalignment. Observe the belt operation or the angle scale mark 121, and after adjusting to the optimal angle, tighten the locking nut 53, and use the elastic washer 54 to clamp and fix the main rod 41. Then, use the first locking pin to lock the locking rod and the guide rail, which can effectively resist the vibration during equipment operation and prevent the position from shifting after adjustment. Check the tightness of the locking nut monthly, and tighten it in time if it is loose.

[0055] In some embodiments, the large conveyor belt drive roller adjustment device further includes: a counterweight tensioning mechanism 6, which includes: The first fixed pulley group 61 is fixed on the frame 21; The second fixed pulley assembly 62 is fixed on the second crossbeam 13 on the support base 1 and is located on one side of the frame 21. The third fixed pulley group 63 is fixed above the second fixed pulley group 62 by a support frame 64; The wire rope 65 is wound around the first fixed pulley block 61, the second fixed pulley block 62, and the third fixed pulley block 63, and the two ends of the wire rope 65 are connected to the counterweights 66.

[0056] In some embodiments, the counterweight 66 includes: A horizontal suspension plate 661 is fixedly connected to both ends of a steel wire rope 65. There are two vertical suspension rods 662, and their upper ends are fixedly connected to the horizontal suspension plate 661. Support plate 663, which is fixedly connected to the lower ends of the two vertical hangers 662; There are multiple counterweights 664, which are stacked on the support plate 663.

[0057] In some embodiments, two lateral limiting notches 6641 are provided on one side of the counterweight 664, and two vertical lifting rods 662 are respectively inserted into the corresponding lateral limiting notches 6641.

[0058] The belt tension adjustment process in this embodiment: When it is necessary to move the roller adjusting frame 2 backward to loosen the belt, loosen the locking nut 53 and remove part of the counterweight 664. At this time, the counterweight tension decreases, and under the pull of the belt tension, the frame 21 moves backward a certain distance. After the belt loosening adjustment is completed, tighten the locking nut 53 to fix the main rod 41 and prevent the frame 21 from shaking. Conversely, when it is necessary to move forward to tension the belt, the counterweight 664 can be added to use gravity to help pull the frame 21 forward a certain distance, making the tensioning operation easier and more stable.

[0059] The compatibility range, performance parameters, and specifications of this device are as follows: Large conveyor belt driven rollers with belt width of 800-2000mm and roller diameter of 500-1200mm; working environment: temperature -20℃ to 80℃, relative humidity ≤90%, can be used in dusty and slightly corrosive environments; adjustment performance: adjustment angle range -30° to +30°, adjustment accuracy 0.5°, maximum labor saving multiple of 10 times; structural strength: maximum load capacity 50kN, no obvious deformation after long-term use; service life: under normal maintenance, the service life of the main structure is ≥5 years.

[0060] Comparison table of the beneficial effects of this device with existing technologies:

[0061] This invention solves the problems of poor flexibility, cumbersome operation, low precision, and time-consuming and labor-intensive adjustment of existing transmission roller misalignment and belt tension by adjusting roller offset using a lever principle and adjusting belt tension through a counterweight tensioning mechanism. Furthermore, the corresponding structural components of this device are all made of high-strength alloy steel with anti-corrosion and rust-proof treatment (using hot-dip galvanizing), possessing excellent corrosion resistance and wear resistance, making it suitable for harsh working environments such as mines and ports. Therefore, this device is suitable for large-scale conveyor belt equipment in industries such as mining, ports, and metallurgy, effectively improving belt operation stability, reducing maintenance costs, and possessing significant practical value and promising prospects for widespread application.

[0062] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0063] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A large conveyor belt drive roller adjustment device, characterized in that, include: Support base (1); A roller adjustment frame (2) is placed on the top of the support base (1), and a belt-driven roller (3) is installed on the roller adjustment frame (2). Adjusting lever (4), one end of which is fixedly connected to one side of the roller adjusting frame (2), and the other end of which is the pushing end; Locking assembly (5) is fixed on the support base (1) and located on one side of the roller adjustment frame (2). The adjustment lever (4) can be locked and fixed by the locking assembly (5).

2. The large conveyor belt drive roller adjustment device according to claim 1, characterized in that, Two guide rails (11) are arranged parallel to each other at intervals on the support base (1). The roller adjusting frame (2) includes: The frame (21) is equipped with movable wheels (22) on both the left and right sides. The movable wheels (22) can move back and forth and left and right on the guide rail (11). One end of the frame (21) is fixedly connected to one end of the adjusting lever (4). Support bearing seats (23), there are two support bearing seats (23), which are respectively fixed on the left and right sides of the frame (21). The two ends of the axle of the belt drive roller (3) can be fixedly connected to the inner rings of the bearings on the two support bearing seats (23).

3. The large conveyor belt drive roller adjustment device according to claim 2, characterized in that, The guide rail (11) has multiple locking holes (111) spaced apart along its length. The left and right sides of the frame (21) are fixed with locking rods (211). The locking rods (211) have through holes (2111). The first locking pin passes through the corresponding locking holes (111) and through holes (2111).

4. A large conveyor belt drive roller adjustment device according to claim 3, characterized in that, The locking rod (211) is provided with a sliding groove (2112), which is slidably connected to the guide rail (11).

5. A large conveyor belt drive roller adjustment device according to any one of claims 2-4, characterized in that, The adjusting lever (4) includes: The main rod (41) is fixedly connected at one end to one side of the frame (21), and the other end is provided with a plug-in interface (411). Multiple adjustment holes (4111) are provided on both sides of the plug-in interface (411). The main rod (41) can be locked and fixed by the locking assembly (5). An extension rod (42) is provided with a plug-in block (421) fixed at one end. The plug-in block (421) can be inserted into the plug-in interface (411). Multiple positioning holes (4211) are provided on the side wall of the plug-in block (421). A second locking pin passes through the corresponding adjustment hole (4111) and positioning hole (4211). The other end of the extension rod (42) is the pushing end. The outer wall surface of the pushing end is provided with an anti-slip surface (422).

6. A large conveyor belt drive roller adjustment device according to claim 5, characterized in that, The locking assembly (5) includes: Locking screw (51), the locking screw (51) is fixed on the first crossbeam (12) on the support base (1) by the support block (52), and the main rod (41) is attached to the locking screw (51); Locking nuts (53) are two screwed onto the locking screw (51), and the two locking nuts (53) are located on the left and right sides of the main rod (41) respectively, for clamping and fixing the main rod (41), and elastic washers (54) are pressed between the two sides of the main rod (41) and the two locking nuts (53).

7. A large conveyor belt drive roller adjustment device according to claim 6, characterized in that, The first crossbeam (12) is provided with an angle scale marking line (121) for indicating the adjustment angle of the belt drive roller (3).

8. A large conveyor belt drive roller adjustment device according to any one of claims 2-4 and 6-7, characterized in that, Also includes: The counterweight tensioning mechanism (6) includes: The first fixed pulley group (61) is fixed on the frame (21); The second fixed pulley assembly (62) is fixed on the second crossbeam (13) on the support base (1) and is located on one side of the frame (21); The third fixed pulley group (63) is fixed above the second fixed pulley group (62) by a support frame (64); A steel wire rope (65) is wound around the first fixed pulley group (61), the second fixed pulley group (62), and the third fixed pulley group (63), and counterweights (66) are connected to both ends of the steel wire rope (65).

9. A large conveyor belt drive roller adjustment device according to claim 8, characterized in that, The counterweight (66) includes: A horizontal suspension plate (661) is fixedly connected to both ends of the wire rope (65); Two vertical suspension rods (662) are provided, and their upper ends are fixedly connected to the horizontal suspension plate (661). The support plate (663) is fixedly connected to the lower ends of the two vertical hanging rods (662); A counterweight (664), wherein there are multiple counterweights (664), which are stacked on the support plate (663).

10. A large conveyor belt drive roller adjustment device according to claim 9, characterized in that, Two lateral limiting notches (6641) are provided on one side of the counterweight (664), and the two vertical lifting rods (662) are respectively inserted into the corresponding lateral limiting notches (6641).

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