A self-resetting conveyor belt correction roller assembly

Abstract

This invention relates to an automatically resetting conveyor belt alignment idler assembly, which is installed on a belt conveyor. The belt conveyor includes a frame, a conveyor belt, and a drive motor. Several sets of adaptive alignment mechanisms are arranged on the frame along the width of the conveyor belt. Each adaptive alignment mechanism includes a central idler and lateral idlers located on either side of the central idler. The shaft ends of both the central and lateral idlers are mounted on positioning brackets. A reset part connected to the positioning brackets is provided on the frame. The reset part causes the positioning brackets to adaptively displace under lateral force and drives them to reset after the lateral force is removed. This automatically resetting conveyor belt alignment idler assembly, by providing a reset part connected to the positioning brackets on the frame, achieves automatic reset of the alignment idler group after deviation is eliminated. This avoids abnormal wear and increased running resistance at the conveyor belt edges caused by long-term skewness of the idler group, and improves the sensitivity and accuracy of the alignment action.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor technology, specifically to a conveyor belt alignment idler assembly with automatic reset capability. Background Technology

[0002] Belt conveyors are widely used in mining, ports, metallurgy and other industries for the continuous transport of bulk materials. During operation, the conveyor belt often runs off-center due to reasons such as eccentric material drop, misalignment of idler rollers, and uneven conveyor belt joints. This not only causes material spillage and increased wear on the conveyor belt edges, but in severe cases, it can even lead to conveyor belt tearing or equipment damage.

[0003] To correct conveyor belt deviation, existing technologies commonly employ guide roller sets, which typically consist of a central guide roller and two lateral guide rollers arranged at an angle on both sides, forming a trough-shaped support surface. When the conveyor belt deviates, the friction between the guide rollers and the conveyor belt drives the guide roller frame to deflect, thereby generating a lateral restoring force that pushes the conveyor belt back to the center position.

[0004] However, the existing corrective roller sets have some shortcomings in practical applications. When the lateral force generated by the conveyor belt deviation is eliminated or weakened, the positioning bracket that has deviated or shifted cannot automatically return to its initial position, causing the roller set to be in an abnormal posture for a long time. This continuous skewed state not only aggravates the wear and running resistance of the conveyor belt edge, but also reduces the sensitivity and accuracy of subsequent correction actions, affecting the long-term stable operation of the conveyor belt.

[0005] Therefore, an automatically reset conveyor belt alignment idler assembly is proposed to solve the technical problem that the positioning bracket cannot automatically reset after the lateral force is eliminated, resulting in long-term skewness of the idler group, aggravated conveyor belt wear and running resistance. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an automatically reset conveyor belt alignment idler assembly, which has the advantages of automatic reset and solves the problem that existing alignment idler assemblies cannot automatically reset, resulting in continuous skewness of the idler assembly, increased wear on the conveyor belt edges, and increased running resistance.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatically reset conveyor belt correction roller assembly, which is installed on a belt conveyor, the belt conveyor including a frame, a conveyor belt and a motor for driving the conveyor belt, and the frame is provided with a plurality of adaptive correction mechanisms along the width direction of the conveyor belt.

[0008] The adaptive correction mechanism includes an intermediate idler roller and lateral idler rollers located on both sides of the intermediate idler roller. The shaft ends of the intermediate idler roller and the lateral idler rollers are both mounted on a positioning bracket. The frame is provided with a reset part connected to the positioning bracket. The reset part causes the positioning bracket to undergo adaptive displacement under the action of lateral force and drives it to reset after the lateral force is eliminated.

[0009] Furthermore, the lateral idler rollers are inclined outward relative to the intermediate idler rollers, so that the intermediate idler rollers and the two lateral idler rollers together form a groove-shaped support surface.

[0010] Furthermore, the positioning bracket is provided with a bearing seat, and the shaft ends of the intermediate roller and the side roller are rotatably supported on the positioning bracket through the bearing seat.

[0011] Furthermore, the outer wall of the intermediate idler roller and / or the side idler roller is provided with an anti-slip layer, which is a polyurethane coating layer or a rubber layer.

[0012] Furthermore, the reset unit includes:

[0013] A connecting bracket is fixedly installed on the frame, and the connecting bracket has a mounting surface facing the positioning bracket;

[0014] Several grooves are formed on the mounting surface;

[0015] The telescopic rod has one end fixed in the groove and the other end connected to the positioning bracket;

[0016] A damping spring A is sleeved on the telescopic rod. One end of the damping spring A is connected to the fixed end of the telescopic rod, and the other end is connected to the movable end of the telescopic rod.

[0017] When the positioning bracket is displaced under the action of lateral force, the telescopic rod is compressed and the damping spring A is compressed and stored energy. When the lateral force is eliminated, the damping spring A releases the stored energy and drives the telescopic rod to extend, thereby causing the positioning bracket to reset.

[0018] Furthermore, the positioning bracket is provided with several rods, and the connecting bracket is provided with through holes for inserting the rods. A damping spring B is sleeved on the outside of the rod, and the two ends of the damping spring B are respectively connected to the positioning bracket and the connecting bracket.

[0019] Furthermore, the frame is also equipped with a guide assembly, which is used to limit and correct the deviation of both sides of the conveyor belt.

[0020] Furthermore, the guiding component includes:

[0021] Guide bracket;

[0022] A slewing bearing is disposed between the guide bracket and the frame, and the guide bracket is rotatably connected to the frame via the slewing bearing;

[0023] The guide center roller and the guide side rollers located on both sides of the guide center roller are provided on the guide bracket.

[0024] Two vertical rollers are respectively set on both sides of the guide bracket and located on the outer sides of the conveyor belt.

[0025] Furthermore, ball bearings are provided inside the guide center roller, the guide side roller, and the vertical roller. The guide center roller and the guide side roller are rotatably supported on the guide bracket by the ball bearings, and the vertical roller is rotatably mounted on the guide bracket by the ball bearings.

[0026] Furthermore, the axis of the vertical roller is perpendicular to the bearing surface of the conveyor belt, and an elastic wear-resistant layer is provided on the outer side of the vertical roller. The material of the elastic wear-resistant layer is any one of polyurethane, rubber, and thermoplastic elastomer.

[0027] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0028] 1. This automatically reset conveyor belt correction idler assembly, by setting several sets of adaptive correction mechanisms on the frame along the width direction of the conveyor belt, when the conveyor belt deviates and generates lateral force, the positioning bracket can drive the intermediate idler and the lateral idler to make adaptive displacement for correction. When the lateral force is eliminated, the reset unit can automatically drive the positioning bracket and the intermediate idler and the lateral idler on it to reset to the initial position. Compared with the existing correction idler group, which cannot automatically reset after the lateral force is eliminated, this avoids the idler group being in a skewed state for a long time, thereby effectively reducing abnormal wear and running resistance at the edge of the conveyor belt, improving the sensitivity and accuracy of subsequent correction actions, and ensuring the long-term stable operation of the conveyor belt.

[0029] 2. This automatically resetting conveyor belt correction roller assembly features a resetting section consisting of a connecting bracket, a telescopic rod, and a damping spring. When the lateral force is eliminated, the damping spring releases its stored energy, driving the telescopic rod to extend and smoothly resetting the positioning bracket. The resetting process is smooth and impact-free. Furthermore, the structure of the rod and damping spring working together further enhances the reliability and synchronization of the resetting. In addition, by installing a guide assembly with vertical rollers on the frame, active limiting and correction of both sides of the conveyor belt can be achieved. The elastic wear-resistant layer on the outer side of the vertical rollers effectively reduces wear on the conveyor belt edges, further enhancing the reliability of the correction and its adaptability to different working conditions. Attached Figure Description

[0030] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the connection structure between the frame and the positioning bracket in this invention;

[0032] Figure 3 This is a schematic diagram of the connection structure between the intermediate idler roller and the side idler roller in this invention;

[0033] Figure 4 This is a schematic diagram of the disassembled structure of the telescopic rod and the connecting bracket in this invention;

[0034] Figure 5 This is a schematic diagram of the connection structure between the telescopic rod and the damping spring A in this invention;

[0035] Figure 6 This is a schematic diagram showing the disassembled structure of the positioning bracket and the connecting bracket in this invention;

[0036] Figure 7 This is a schematic diagram of the connection structure between the frame and the guide support in this invention;

[0037] Figure 8 This is a schematic diagram showing the disassembled structure of the slewing bearing and guide bracket in this invention.

[0038] In the diagram: 100, belt conveyor; 200, frame; 201, guide support; 202, guide center idler; 203, guide side idler; 204, vertical roller; 205, slewing bearing; 300, conveyor belt; 400, adaptive correction mechanism; 401, intermediate idler; 402, side idler; 403, positioning support; 404, connecting support; 405, groove; 406, telescopic rod; 407, damping spring A; 408, rod body; 409, damping spring B. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Example 1:

[0041] Please see Figure 1-3 In this embodiment, an automatically reset conveyor belt correction roller assembly is installed on a belt conveyor 100. The belt conveyor 100 includes a frame 200, a conveyor belt 300, and a motor for driving the conveyor belt 300. The frame 200 is provided with several sets of adaptive correction mechanisms 400 along the width direction of the conveyor belt 300.

[0042] The adaptive correction mechanism 400 includes an intermediate roller 401 and lateral rollers 402 located on both sides of the intermediate roller 401. The shaft ends of the intermediate roller 401 and the lateral rollers 402 are both mounted on the positioning bracket 403. The frame 200 is provided with a reset part connected to the positioning bracket 403. The reset part causes the positioning bracket 403 to undergo adaptive displacement under the action of lateral force and drives it to reset after the lateral force is eliminated.

[0043] In application, the belt conveyor 100 is started, and the conveyor belt 300 runs under the drive of the motor. The intermediate idler 401 and the side idler 402 play a role in bearing and guiding the conveyor belt 300. When the conveyor belt 300 deviates due to material eccentricity or idler installation deviation, lateral friction is generated between the conveyor belt 300 and the intermediate idler 401 and the side idler 402. This lateral force acts on the positioning bracket 403, causing the positioning bracket 403, together with the intermediate idler 401 and the side idler 402 on it, to undergo adaptive displacement. The entire idler group deflects, thereby generating a lateral restoring force on the conveyor belt 300, pushing the conveyor belt 300 back to the center position, and realizing the deviation correction function.

[0044] When the conveyor belt 300 deviates from its intended path and the lateral force is eliminated or weakened, the reset unit connected to the positioning bracket 403 automatically drives the positioning bracket 403 and its intermediate idler roller 401 and lateral idler roller 402 to reset to their initial positions, so that the idler roller group returns to its normal trough support posture and prepares for the next deviation correction. This avoids the idler roller group from being in a skewed state for a long time, reduces abnormal wear on the edge of the conveyor belt 300, and ensures the long-term stable operation of the conveyor belt 300.

[0045] In this embodiment, the belt conveyor 100 is a common belt conveyor in the prior art. Its basic structure, working principle and usage are common knowledge to those skilled in the art of belt conveyor equipment. Therefore, its specific structure and operation control method will not be described in detail here.

[0046] Example 2:

[0047] The basic content is the same as in Example 1, except that:

[0048] Please see Figure 3 In this embodiment, the lateral roller 402 is inclined outward relative to the middle roller 401, so that the middle roller 401 and the two lateral rollers 402 together form a groove-shaped support surface.

[0049] The positioning bracket 403 is provided with a bearing seat, and the shaft ends of the intermediate roller 401 and the side roller 402 are rotatably supported on the positioning bracket 403 through the bearing seat.

[0050] The outer wall of the intermediate idler roller 401 and / or the side idler roller 402 is provided with an anti-slip layer, which is a polyurethane coating layer or a rubber layer.

[0051] When applied, the trough-shaped support surface formed by the middle idler 401 and the two side idlers 402 can effectively wrap the load-bearing section of the conveyor belt 300, increase the contact area between the idler and the conveyor belt 300, make the conveyor belt 300 more stable during operation, and reduce the jumping of the conveyor belt 300 caused by material impact or deviation.

[0052] When the conveyor belt 300 deviates and generates lateral force, the positioning bracket 403 undergoes adaptive displacement, and the intermediate idler 401 and the side idler 402 move together with the positioning bracket 403. Since the shaft ends of the intermediate idler 401 and the side idler 402 are rotatably supported on the positioning bracket 403 through bearing seats, the idlers rotate flexibly and have low resistance. They are not prone to jamming during long-term operation, thus extending the service life of the idlers and bearings.

[0053] Meanwhile, the anti-slip layer on the outer wall of the intermediate idler 401 and / or the lateral idler 402 increases the coefficient of friction between the idler and the conveyor belt 300, so that the lateral friction force generated when the conveyor belt 300 deviates can be more effectively transmitted to the positioning bracket 403, improving the sensitivity and reliability of the correction response, and reducing the relative sliding wear between the conveyor belt 300 and the idler.

[0054] Once the lateral force is eliminated, the reset unit drives the positioning bracket 403 and its intermediate roller 401 and lateral roller 402 to reset to their initial positions, and the grooved support surface returns to its normal alignment posture, preparing for the next correction.

[0055] Example 3:

[0056] The basic content is the same as in Example 1, except that:

[0057] Please see Figure 4-6 The reset unit in this embodiment includes:

[0058] The connecting bracket 404 is fixedly installed on the frame 200, and the connecting bracket 404 has a mounting surface facing the positioning bracket 403;

[0059] Several grooves 405 are formed on the mounting surface;

[0060] The telescopic rod 406 has one end fixed in the groove 405 and the other end connected to the positioning bracket 403;

[0061] Damping spring A407 is sleeved on telescopic rod 406. One end of damping spring A407 is connected to the fixed end of telescopic rod 406, and the other end is connected to the movable end of telescopic rod 406.

[0062] When the positioning bracket 403 is displaced under the action of lateral force, the telescopic rod 406 is compressed and the damping spring A407 is compressed and stored energy. When the lateral force is eliminated, the damping spring A407 releases the stored energy to drive the telescopic rod 406 to extend, thereby causing the positioning bracket 403 to return to its original position.

[0063] The positioning bracket 403 is provided with several rods 408, and the connecting bracket 404 is provided with through holes for the rods 408 to be inserted. A damping spring B409 is sleeved on the outside of the rods 408, and the two ends of the damping spring B409 are connected to the positioning bracket 403 and the connecting bracket 404 respectively.

[0064] In application, when the conveyor belt 300 deviates and generates a lateral force that acts on the positioning bracket 403, the positioning bracket 403 is displaced toward the connecting bracket 404. During this process, the movable end of the telescopic rod 406 moves with the positioning bracket 403, and the entire telescopic rod 406 is compressed. The damping spring A407 sleeved on the telescopic rod 406 is compressed and stores elastic potential energy. At the same time, the rod body 408 on the positioning bracket 403 slides synchronously in the through hole on the connecting bracket 404. The damping spring B409 sleeved on the outside of the rod body 408 is compressed between the positioning bracket 403 and the connecting bracket 404, further absorbing the impact energy generated by the lateral force.

[0065] Once the conveyor belt 300's deviation is corrected and the lateral force is eliminated, the damping springs A407 and B409 release their stored elastic potential energy, driving the telescopic rod 406 to extend and pushing the rod body 408 to slide in the reverse direction within the through hole. This causes the entire positioning bracket 403 and its intermediate idler roller 401 and side idler roller 402 to smoothly return to their initial positions.

[0066] In this embodiment, the cooperation between the telescopic rod 406 and the damping spring A407, and the auxiliary cooperation between the rod body 408 and the damping spring B409, forms a double buffer reset structure. The reset process is smooth and impact-free. The reset force and response speed can be adjusted by selecting damping springs of different specifications, which further enhances the reliability and synchronization of the reset.

[0067] It should be noted that the specific specifications of damping springs A407 and B409, such as spring stiffness and free length, can be selected according to the actual working conditions such as the width of the conveyor belt 300, belt speed, and material load, in order to meet the reset requirements in different application scenarios.

[0068] Furthermore, the specific structural form of the telescopic rod 406 in this embodiment can be selected according to the actual working conditions. For example, the telescopic rod 406 can be a spring-return type telescopic rod, that is, a return spring is preset inside, forming a double elastic return structure with the externally sleeved damping spring A407, which makes the return response faster. Alternatively, a gas spring telescopic rod can be used, which uses high-pressure gas in the cylinder to provide stable damping force and return force, suitable for buffering return under heavy load and high belt speed conditions. A hydraulic damping telescopic rod can also be used, which provides damping characteristics related to the movement speed through the throttling effect of internal hydraulic oil, making the return process smoother and gentler. The above-mentioned different types of telescopic rods are all conventional replacements that can be made by those skilled in the art according to actual needs, and should all be included within the protection scope of this invention.

[0069] Example 4:

[0070] The basic content is the same as in Example 1, except that:

[0071] Please see Figure 7-8 In this embodiment, the frame 200 is also provided with a guide component, which is used to limit and correct the deviation of both sides of the conveyor belt 300.

[0072] The guiding components include:

[0073] Guide bracket 201;

[0074] A slewing bearing 205 is disposed between the guide bracket 201 and the frame 200, and the guide bracket 201 is rotatably connected to the frame 200 through the slewing bearing 205;

[0075] The guide center roller 202 and the guide side rollers 203 located on both sides of the guide center roller 202 are provided on the guide bracket 201.

[0076] Two vertical rollers 204 are respectively set on both sides of the guide bracket 201 and located on the outer sides of both sides of the conveyor belt 300.

[0077] The guide center roller 202, the guide side roller 203, and the vertical roller 204 are all equipped with ball bearings. The guide center roller 202 and the guide side roller 203 are rotatably supported on the guide bracket 201 by ball bearings, and the vertical roller 204 is rotatably mounted on the guide bracket 201 by ball bearings.

[0078] The axis of the vertical roller 204 is perpendicular to the bearing surface of the conveyor belt 300. An elastic wear-resistant layer is provided on the outer side of the vertical roller 204. The material of the elastic wear-resistant layer is any one of polyurethane, rubber, or thermoplastic elastomer.

[0079] In application, the guide components are arranged at intervals on the frame 200 along the width direction of the conveyor belt 300. When the conveyor belt 300 deviates from its original direction and the deviation is large, the side edge of the conveyor belt 300 first contacts the vertical roller 204 on the corresponding side. Since the vertical roller 204 is rotatably mounted on the guide bracket 201 through ball bearings, the vertical roller 204 rotates with the operation of the conveyor belt 300, converting sliding friction into rolling friction, which effectively reduces the wear on the edge of the conveyor belt 300. At the same time, the elastic wear-resistant layer set on the outer side of the vertical roller 204 further buffers the impact of the conveyor belt 300 on the vertical roller 204 and reduces the operating noise.

[0080] When the conveyor belt 300 continuously squeezes the vertical roller 204, the lateral thrust on the vertical roller 204 is transmitted to the guide bracket 201. The guide bracket 201 rotates relative to the frame 200 through the slewing bearing 205, causing the guide center roller 202 and the guide side roller 203 to deflect together. After deflection, the guide center roller 202 and the guide side roller 203 generate a lateral restoring force on the conveyor belt 300, pushing the conveyor belt 300 back to the center position, realizing the limit correction function. When the conveyor belt 300 returns to the normal position, the lateral force acting on the vertical roller 204 disappears, and the guide bracket 201 rotates back to the initial position under the reset action of the slewing bearing 205.

[0081] In this embodiment, the guide component and the adaptive correction mechanism 400 work together. The adaptive correction mechanism 400 is mainly responsible for correcting the daily deviation of the conveyor belt 300 and automatically resetting it. The guide component acts as an auxiliary limiting device, which actively limits and forces the deviation when the deviation of the conveyor belt 300 exceeds the preset range. The two work together to form a multi-level correction protection system, which further improves the stability and safety of the operation of the conveyor belt 300.

[0082] It should be noted that both the guide center idler 202 and the guide side idler 203 are equipped with ball bearings, which allow for flexible rotation and low resistance. They are also less prone to jamming during long-term operation. The guide side idler 203 can also be configured to be inclined outward relative to the guide center idler 202 to form a trough-shaped support surface, thereby enhancing the wrapping and guiding effect on the conveyor belt 300.

[0083] It is understood that the height, diameter, and thickness of the elastic wear-resistant layer of the vertical roller 204 can be adapted and adjusted according to the width, thickness, and material characteristics of the conveyor belt 300. The specific type of the slewing bearing 205 can be a rolling bearing or a sliding bearing to meet the usage requirements under different load and speed conditions. In addition, the number and spacing of the guide components on the frame 200 can also be flexibly set according to the actual deviation of the conveyor belt 300. All of the above conventional changes should be included within the protection scope of this invention.

[0084] In summary, the working principle of this automatically reset conveyor belt alignment idler assembly is as follows:

[0085] After the belt conveyor 100 starts, the conveyor belt 300 runs under the drive of the motor. The intermediate idler 401 and the side idler 402 provide support and guidance for the conveyor belt 300. When the conveyor belt 300 deviates from its designated path, lateral friction is generated between the conveyor belt 300 and the intermediate idler 401 and the side idler 402. This lateral force acts on the positioning bracket 403, causing the positioning bracket 403 and the idler rollers on it to undergo adaptive displacement. The entire idler assembly deflects at a certain angle, which exerts a certain force on the conveyor belt 300. A lateral restoring force pointing towards the center gradually pushes the misaligned conveyor belt 300 back to its normal position. When the misalignment is large, the side of the conveyor belt 300 contacts the vertical roller 204 in the guide assembly. The lateral thrust received by the vertical roller 204 is transmitted to the guide bracket 201. The guide bracket 201 rotates relative to the frame 200 through the slewing bearing 205, causing the guide center roller 202 and the guide side roller 203 to deflect together, generating an auxiliary correction force on the conveyor belt 300 and realizing the limit correction function.

[0086] When the conveyor belt 300 deviates from its designated path and the lateral force is eliminated or weakened, the reset part connected to the positioning bracket 403 automatically releases the elastic potential energy stored during the displacement process, driving the positioning bracket 403 and the idler rollers on it to move in the opposite direction and smoothly reset to the initial position. At the same time, the lateral force acting on the vertical roller 204 in the guide assembly disappears, and the guide bracket 201 rotates back to the initial position under the reset action of the slewing bearing 205. Through the coordinated work of the adaptive correction mechanism 400 and the guide assembly, the present invention realizes multi-level correction protection. It can adaptively correct deviation when deviation occurs and automatically reset after deviation is eliminated. It effectively avoids the problem of abnormal wear and increased running resistance of the conveyor belt 300 caused by the long-term skewness of the idler roller group due to the inability of the idler roller group to automatically reset in the prior art, and ensures the long-term stable operation of the conveyor belt 300.

[0087] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0088] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A self-resetting conveyor belt alignment idler assembly, mounted on a belt conveyor (100), the belt conveyor (100) comprising a frame (200), a conveyor belt (300), and a motor for driving the conveyor belt (300), characterized in that: The frame (200) is provided with several sets of adaptive correction mechanisms (400) along the width direction of the conveyor belt (300). The adaptive correction mechanism (400) includes an intermediate roller (401) and lateral rollers (402) located on both sides of the intermediate roller (401). The shaft ends of the intermediate roller (401) and the lateral rollers (402) are both mounted on the positioning bracket (403). The frame (200) is provided with a reset part connected to the positioning bracket (403). The reset part causes the positioning bracket (403) to undergo adaptive displacement under the action of lateral force and drives it to reset after the lateral force is eliminated.

2. A self-resetting conveyor belt correction roller assembly according to claim 1, wherein: The lateral roller (402) is inclined outward relative to the intermediate roller (401), so that the intermediate roller (401) and the two lateral rollers (402) together form a groove-shaped support surface.

3. A self-resetting conveyor belt correction roller assembly as defined in claim 1, wherein: The positioning bracket (403) is provided with a bearing seat, and the shaft ends of the intermediate roller (401) and the side roller (402) are rotatably supported on the positioning bracket (403) through the bearing seat.

4. A self-resetting conveyor belt correction roller assembly as defined in claim 1, wherein: The outer wall of the intermediate idler roller (401) and / or the side idler roller (402) is provided with an anti-slip layer, which is a polyurethane coating layer or a rubber layer.

5. A self-reseating conveyor belt correction roller assembly as defined in claim 1, wherein: The reset unit includes: A connecting bracket (404) is fixedly installed on the frame (200), and the connecting bracket (404) has a mounting surface facing the positioning bracket (403); Several grooves (405) are formed on the mounting surface; The telescopic rod (406) has one end fixed in the groove (405) and the other end connected to the positioning bracket (403); Damping spring A (407) is sleeved on the telescopic rod (406). One end of the damping spring A (407) is connected to the fixed end of the telescopic rod (406), and the other end is connected to the movable end of the telescopic rod (406). When the positioning bracket (403) is displaced under the action of lateral force, the telescopic rod (406) is compressed and the damping spring A (407) is compressed and stored energy. When the lateral force is eliminated, the damping spring A (407) releases the stored energy to drive the telescopic rod (406) to extend and drive the positioning bracket (403) to reset.

6. A self-retracting conveyor belt correction roller assembly as defined in claim 5, wherein: The positioning bracket (403) is provided with a plurality of rods (408), and the connecting bracket (404) is provided with through holes for inserting the rods (408). A damping spring B (409) is sleeved on the outside of the rod (408), and the two ends of the damping spring B (409) are respectively connected to the positioning bracket (403) and the connecting bracket (404).

7. A self-retracting conveyor belt correction roller assembly as defined in claim 1, wherein: The frame (200) is also provided with a guide assembly, which is used to limit and correct the deviation of both sides of the conveyor belt (300).

8. A self-retracting conveyor belt correction roller assembly as defined in claim 7, wherein: The guiding component includes: Guide bracket (201); A slewing bearing (205) is disposed between the guide bracket (201) and the frame (200), and the guide bracket (201) is rotatably connected to the frame (200) through the slewing bearing (205); The guide center roller (202) and the guide side rollers (203) located on both sides of the guide center roller (202) are provided on the guide bracket (201). Two vertical rollers (204) are respectively disposed on both sides of the guide bracket (201) and located on the outer sides of both sides of the conveyor belt (300).

9. The automatically reset conveyor belt alignment idler assembly according to claim 8, characterized in that: The guide center roller (202), the guide side roller (203), and the vertical roller (204) are all equipped with ball bearings. The guide center roller (202) and the guide side roller (203) are rotatably supported on the guide bracket (201) by the ball bearings, and the vertical roller (204) is rotatably mounted on the guide bracket (201) by the ball bearings.

10. A self-reseating conveyor belt correction roller assembly as defined in claim 8, wherein: The axis of the vertical roller (204) is perpendicular to the bearing surface of the conveyor belt (300). An elastic wear-resistant layer is provided on the outer side of the vertical roller (204). The material of the elastic wear-resistant layer is any one of polyurethane, rubber, or thermoplastic elastomer.

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