Multi-degree-of-freedom carrier roller deviation rectifying device

Abstract

The invention relates to a multi-degree-of-freedom carrier roller deviation rectifying device. The multi-degree-of-freedom carrier roller deviation rectifying device comprises a bearing frame, a deviation rectifying device and a deviation rectifying device, wherein the bearing frame is fixedly mounted on a belt conveyor; the rotating device is arranged on the bearing frame, the rotating device can rotate relative to the bearing frame, and the rotating plane of the rotating device is parallel to the working plane of a conveying belt of the belt conveyor; and the aligning mechanism is arranged on the rotating device, and the aligning mechanism can swing in a plane perpendicular to the running direction of the conveying belt. The rotating device capable of horizontally rotating and the aligning mechanism capable of vertically swinging are designed, the rotating device rotates to enable the aligning carrier roller frame to horizontally rotate to generate transverse friction component force, the aligning mechanism swings to generate transverse gravity component force, and deviation correction of the conveying belt is achieved through the combined action of the rotating device and the aligning mechanism.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor technology, and more particularly to a multi-degree-of-freedom idler roller correction device. Background Technology

[0002] When belt conveyors are running, belt misalignment often occurs due to factors such as frame deformation and improper installation of idler rollers. Installing a belt alignment device is a common solution. Existing belt alignment devices often use a rotating pair perpendicular to the working plane of the conveyor belt. When the conveyor belt deviates laterally, it generates angular displacement to achieve the correction function. However, this type of alignment device only has rotational freedom in a single plane and can only correct linear misalignment within a single plane, failing to address complex spatial misalignment issues. Summary of the Invention

[0003] In view of this, the present invention provides a multi-degree-of-freedom idler roller correction device, thereby solving or alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0004] To achieve the aforementioned objectives, the present invention provides a multi-degree-of-freedom idler roller correction device, wherein the multi-degree-of-freedom idler roller correction device comprises: A support frame, which is fixedly installed on the belt conveyor; A rotating device is mounted on the support frame and is capable of rotating relative to the support frame. The plane of rotation of the rotating device is parallel to the working plane of the conveyor belt of the belt conveyor. A self-aligning mechanism is provided on the rotating device and is capable of oscillating in a plane perpendicular to the direction of travel of the conveyor belt.

[0005] In the multi-degree-of-freedom roller correction device described above, optionally, an arc-shaped guide rod is fixedly installed on the support frame, and the rotating device includes a rotating chassis. An arc-shaped sleeve is fixedly installed at the bottom of the rotating chassis, and the sleeve and the guide rod are slidably engaged.

[0006] In the multi-degree-of-freedom roller alignment device described above, optionally, the two sleeves are distributed along opposite radial directions on the outer edge of the rotating chassis.

[0007] In the multi-degree-of-freedom idler roller correction device described above, the idler roller correction device may optionally further include a drive mechanism, the drive mechanism including a threaded adjusting rod and a turnbuckle, the turnbuckle including an adjusting end and a connecting end; One end of the threaded adjusting rod is hinged to the support frame, and the other end is screwed to the adjusting end. The adjusting end is rotatably connected to the connecting end, and the connecting end is hinged to the rotating chassis. When the adjusting end rotates, the adjusting end can move along the axial direction of the threaded adjusting rod, thereby driving the rotating chassis to rotate. In the multi-degree-of-freedom idler roller correction device described above, optionally, the self-aligning mechanism includes a self-aligning idler frame, a chute is provided inside the self-aligning idler frame, and a roller is provided on the top of the rotating chassis. The roller can roll along the chute, and the extension direction of the chute is perpendicular to the running direction of the conveyor belt.

[0008] In the multi-degree-of-freedom idler roller correction device described above, optionally, the two rollers are distributed on both sides of the rotating chassis along opposite radial directions, and the self-aligning idler frame includes a first idler frame and a second idler frame, wherein the first idler frame is provided with a first groove and the second idler frame is provided with a second groove. The first idler frame and the second idler frame are symmetrically arranged at both ends of the self-aligning idler frame, and the two rollers are slidably connected to the first chute and the second chute, respectively.

[0009] In the multi-degree-of-freedom idler roller correction device described above, optionally, the first chute and the second chute extend in a straight line, the first chute and the second chute are inclined toward the outside of the self-aligning mechanism, and a certain angle is formed between the two chutes. The first chute and the second chute each have a first inclined surface with the same angle and opposite directions on both sides in the front-back direction, and the front-back direction is parallel to the running direction of the conveyor belt.

[0010] In the multi-degree-of-freedom idler roller correction device described above, optionally, the bottom of the first idler roller frame and the second idler roller frame are provided with a connecting groove, and the extending direction of each connecting groove is consistent with the axial direction of the first slide groove or the second slide groove of the idler roller frame to which it is located. The roller and the rotating chassis are connected by a roller base. The first end of the roller base is fixedly connected to the rotating chassis, and the second end of the roller base extends into the sliding groove through the connecting groove and is rotatably connected to the roller.

[0011] In the multi-degree-of-freedom roller correction device described above, optionally, the second end of the roller base is fixedly connected to the rotating shaft, and the roller includes a first wheel-shaped part and a second wheel-shaped part, both of which have second inclined surfaces with the same inclination angle and opposite directions on their radial outer sides. The first wheel-shaped part and the second wheel-shaped part are each connected to the rotating shaft through bearings. A sleeve is provided between the first wheel-shaped part and the second wheel-shaped part, the sleeve separating the first wheel-shaped part and the second wheel-shaped part, so that the two can rotate relatively independently.

[0012] In the multi-degree-of-freedom idler roller correction device described above, optionally, the first idler frame and the second idler frame are connected by a third idler frame. The first idler frame has a first idler on its first side, the second idler frame has a second idler on its first side, and the third idler frame has a third idler on its second side. The first side is defined as the upstream of the running direction of the conveyor belt, and the second side is defined as the downstream. The outer ends of the first and second idler frames are provided with baffle rollers, and the rotation axis of the baffle rollers is perpendicular to the rotation axis of the first or second idler on the same side. The top of the baffle roller is provided with a baffle plate, which is higher than the bearing surface of the first or second idler on the same side.

[0013] This invention designs a horizontally rotating device and a vertically swinging self-aligning mechanism. The rotation of the rotating device causes the self-aligning idler frame to rotate horizontally, generating a lateral frictional force. The swinging of the self-aligning mechanism generates a lateral gravitational force. The two work together to correct the deviation of the conveyor belt. Attached Figure Description

[0014] The disclosure of this invention will become more apparent from the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings: Figure 1 This is a schematic perspective view of one embodiment of the multi-degree-of-freedom idler roller correction device of the present invention; Figure 2 for Figure 1 A schematic perspective view of another embodiment; Figure 3 for Figure 1 A schematic perspective view of the turnbuckle in the Chinese embodiment; Figure 4 for Figure 1 KK section sectional view of the embodiment; Figure 5 for Figure 1 A cross-sectional view of the split structure of the roller in the embodiment; Figure 6 A schematic diagram of a correction adjustment method for a roller alignment device; Figure 7 This is a force analysis diagram of the conveyor belt after the rotating chassis rotates.

[0015] Reference numerals: 1-Sleeve; 2-Bearing frame; 3-Locking nut; 4-Turn bolt; 41-Adjusting end; 42-Connecting end; 5-Rotating chassis; 6-Roller base; 8-Guide roller; 9-Clamping plate; 101-First idler roller; 102-Second idler roller; 103-Third idler roller; 11-Roller; 13-Conveyor belt; 14-Guide rod; 15-First chute; 16-Second chute; 17-Connecting groove; 19-Threaded adjusting rod; 20-Rotating shaft; 211-First wheel-shaped split body; 212-Second wheel-shaped split body; 221-First inclined plane; 222-Second inclined plane; 23-Sleeve; 24-Bearing; 251-First idler roller frame; 252-Second idler roller frame; 253-Third idler roller frame; 26-Guide plate. Detailed Implementation

[0016] Referring to the accompanying drawings and specific embodiments, the structure, composition, features, and advantages of a multi-degree-of-freedom idler roller correction device of the present invention will be described below by way of example; however, all descriptions should not be construed as limiting the present invention in any way.

[0017] For any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the various drawings, the present invention still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle, and thus these further embodiments according to the present invention should also be considered within the scope of the description herein.

[0018] 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 at least one of that feature.

[0019] In this invention, the terms "front," "rear," "left," "right," 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.

[0020] Figure 1 This is a schematic perspective view of one embodiment of the multi-degree-of-freedom idler roller correction device of the present invention. Figure 1 The X, Y, and Z arrows are shown in the diagram, and they are perpendicular to each other. X represents the horizontal direction, which is also the offset direction of conveyor belt 13; Y represents the extension direction of the conveyor belt; and Z is the vertical axis direction.

[0021] Figure 2 for Figure 1 A schematic perspective view of another embodiment. Figure 2 The conveyor belt and the third idler are not shown.

[0022] The following will combine Figure 1 and Figure 2 This embodiment is described below. The bottom of the idler roller correction device of the present invention has a support frame 2, which is the basic support structure of the device. It can be fixedly installed on the frame of the belt conveyor (the frame of the conveyor is not shown in the accompanying drawings) by welding and bolting. A rotating device is provided on the support frame 2, which can rotate relative to the support frame 2 through its connection with the support frame. Furthermore, the rotation plane of the rotating device is parallel to the working plane of the conveyor belt 13. Figure 1 The XY plane in the diagram allows the device to have an axis perpendicular to the conveyor belt plane. Figure 1 The rotational degree of freedom (Z-axis) is not a fixed geographical horizontal plane, but is always parallel to the conveyor belt plane. Therefore, it will change direction synchronously with the tilt of the conveyor belt and the conveyor frame, ensuring that the rotational degree of freedom always adapts to the actual operating angle of the conveyor belt. Figure 1 The cross-section of the conveyor belt is concave, meaning the working plane where the conveyor belt is located can be parallel to the bottom plane of the conveyor belt. The rotating device is equipped with a self-aligning mechanism, which, through its connection with the rotating device, can adjust the belt in a plane perpendicular to the running direction of the conveyor belt 13. Figure 1 The idler rollers oscillate within the XZ plane. The idler rollers are positioned on top of the self-aligning mechanism and support the conveyor belt 13 of the belt conveyor. When the conveyor belt experiences lateral deviation or more complex multi-directional misalignment, the idler roller correction device of this invention drives the idler roller frame to rotate horizontally in a direction parallel to the conveyor belt plane via a rotating device. Simultaneously, the self-aligning mechanism oscillates within a vertical plane perpendicular to the conveyor belt plane. The combined effect of these two mechanisms creates a spatial composite correction force, achieving dynamic correction of multi-directional misalignment of the conveyor belt.

[0023] The following describes the implementation method of the connection structure between the rotating device and the support frame: In this embodiment, the support frame 2 serves as the basic support component of the entire correction device, and an arc-shaped guide rod 14 can be fixedly installed on its top or inner side. The bending diameter of the guide rod 14 can be greater than or equal to the transverse width of the conveyor belt 13. In this case, the radial dimension of the guide rod is large enough to provide stable rotational support for the rotating device and improve the stability of the device operation.

[0024] The rotating device includes a rotating base 5, on which an arc-shaped sleeve 1 can be fixedly mounted. The sleeve 1 is connected to the guide rod 14 via a sliding fit. The arc-shaped design of the sleeve matches the shape of the guide rod, and an arc-shaped through hole can be provided inside, forming a sliding channel for the guide rod. The radial dimension of the through hole can be 1 to 2 millimeters larger than the guide rod, forming a clearance fit. The inner wall of the through hole can be hardened or have an additional wear-resistant layer applied to reduce wear during operation and improve durability.

[0025] Two sleeves 1 can be distributed radially in opposite directions on the outer edge of the rotating chassis 5. This design is significant for reducing the installation height of the self-aligning mechanism. If the traditional method of placing the rotating shaft at the bottom of the support frame 2 and the rotating sleeve at the center of the rotating device is used, the self-aligning mechanism, located above the rotating device, would be significantly elevated. In practical applications, the height of other fixed idlers along the conveyor belt is fixed; raising the self-aligning mechanism would cause the fixed idlers to lose contact with the conveyor belt, affecting the normal operation of the conveying system. This invention, by placing the sleeves 1 on the outer edge of the rotating chassis 5, matches the height of the self-aligning mechanism with the existing fixed idler height, ensuring the continuity and stability of the entire conveying system. Furthermore, the design of the two sleeves distributed on the outer edge of the rotating chassis results in a larger sleeve spacing, stronger torsional resistance, and improved structural strength of the rotating chassis.

[0026] The following explains the oscillation principle and structural design of the self-aligning mechanism: The self-aligning mechanism, a key component for conveyor belt correction, includes a self-aligning idler frame. A groove is machined within the self-aligning idler frame, and in a stationary state, the extension direction of this groove is perpendicular to the running direction of the conveyor belt 13. Correspondingly, rollers 11 are mounted on the top of the rotating chassis 5, and these rollers 11 can roll along the groove within the self-aligning idler frame. When the conveyor belt 13 deviates perpendicular to its running direction, the edge of the conveyor belt contacts the guide rollers located at both ends of the self-aligning idler frame, generating a tangential force. The rolling of the rollers 11 within the groove allows the self-aligning mechanism to oscillate in a plane perpendicular to the running direction of the conveyor belt 13. Compared to traditional sliding friction structures, this oscillation method, achieved through the cooperation of the rollers 11 and the groove, significantly reduces the frictional resistance during the oscillation process, making the self-aligning mechanism more sensitive to conveyor belt deviation.

[0027] The structure of roller 11 and self-aligning idler frame will be further explained.

[0028] As an alternative embodiment, the self-aligning idler frame may include a first idler frame 251 and a second idler frame 252, which may be symmetrically arranged at both ends of the self-aligning idler frame. A first groove 15 may be provided in the first idler frame 251, and a second groove 16 may be provided in the second idler frame 252. Two rollers 11 may be arranged along opposite radial directions on both sides of the top of the rotating chassis 5. The rollers are slidably connected to the first and second grooves respectively, and the outer rings of the rollers can roll freely within the grooves. The two rollers are distributed in a plane perpendicular to the running direction of the conveyor belt, so that the swing direction of the self-aligning idler frame is also located in this plane. The double-groove-roller design provides stable support for the self-aligning idler frame through symmetrically distributed rolling pairs, while also allowing it to swing freely perpendicular to the running direction of the conveyor belt, resulting in smooth operation and reducing stress concentration.

[0029] Optionally, the self-aligning idler frame may further include a third idler frame 253, with the first idler frame 251 and the second idler frame 252 connected via the third idler frame 253. The first idler frame 251, the second idler frame 252, and the third idler frame 253 can be securely connected by welding or bolting to form a fixed whole, thereby enabling synchronous oscillation. The first side of the first idler frame 251 (defined as the upstream side in the running direction of the conveyor belt 13) Figure 1 The first idler 101 can be installed in the Y direction, the second idler 102 is installed on the first side of the second idler frame 252, and the second side of the third idler frame 253 (defined as the downstream of the running direction of the conveyor belt 13) can be installed in the Y direction. Figure 1 (In the opposite direction of Y) a third idler roller 103 is provided. The first, second, and third idler roller frames can be arranged in the same plane, thus forming a non-aligned idler roller layout design of "two in front and one behind". This design increases the support distance of the idler rollers on the conveyor belt in the direction of conveyor belt operation, and improves the stability of the conveyor belt during operation.

[0030] Guide rollers 8 can be installed at the outer ends of the first idler frame 251 and the second idler frame 252. The guide roller 8 on the side of the first idler frame 251 is perpendicular to the rotation axis of the first idler 101, and the guide roller 8 on the side of the second idler frame 252 is perpendicular to the rotation axis of the second idler 102. This perpendicular arrangement can effectively limit excessive deviation of the conveyor belt in the lateral direction and drive the self-aligning idler frame to act in a timely manner. At the same time, a baffle 26 can be installed at the top of the guide roller 8, and the bottom of the baffle 26 is higher than the bearing surface of the corresponding first idler 101 or second idler 102 on its side. The height difference can be greater than or equal to the thickness of the conveyor belt. When the conveyor belt comes into contact with the guide roller 8 due to deviation, the baffle 26 can further block the deviation trend of the conveyor belt and the lifting of its edges, thereby preventing the conveyor belt from detaching from the idler assembly and enhancing the reliability and safety of the entire belt alignment device. The guide roller 8 is used to prevent the conveyor belt edge from running off the idler roller 10. A retaining plate 9 is installed at both ends of the shaft of the guide roller 8. The retaining plate has through holes with the same diameter as the shaft at both ends of the guide roller. After the retaining plate is fixed to the ends of the first and second idler frames with bolts, the ends of the guide roller 8 are fixed and will not fall out of the slots in the idler frames used to house the ends of the guide roller. Both ends of the first, second, and third idler frames are provided with side-extending support plates. The upper end of the support plates has slots to restrict the movement of the idler roller ends.

[0031] Figure 3 for Figure 1 A schematic perspective view of the turnbuckle in the Chinese embodiment.

[0032] The following is combined Figure 3 The implementation method of the turnbuckle is described below. In this embodiment, the idler roller correction device may further include a drive mechanism, which adopts a telescopic structure combining a threaded adjusting rod 19 and a turnbuckle 4, for actively driving the rotating chassis 5 to rotate.

[0033] One end of the threaded adjusting rod 19 can be provided with a U-shaped hinge lug, which is hinged to the side upright plate of the support frame 2. The other end of the threaded adjusting rod is a threaded rod. The turnbuckle 4 includes an adjusting end 41 and a connecting end 42. The adjusting end 41 serves as the operating end for actively adjusting the extension and retraction length of the drive mechanism. Both ends of the adjusting end are provided with coaxial through holes and threaded holes. The threaded adjusting rod is screwed to the adjusting end 41 through the threaded rod and threaded holes. One side of the connecting end 42 is provided with a double lug hinge structure, which is hinged to the lug on the edge upright plate of the rotating chassis. The other side of the connecting end 42 is provided with a protruding optical shaft, which is rotatably engaged with the through hole on the adjusting end 41. The end of the optical shaft is threaded, and a nut is provided thereon, thereby axially fixing the adjusting end and the connecting end while allowing them to rotate freely relative to each other. A locking nut 3 can be installed on the remaining thread of the threaded adjusting rod 19 before it is screwed into the adjusting end 41. After the length of this drive mechanism is adjusted to the correct position, the relative position of the adjusting end 41 and the threaded adjusting rod can be fixed by tightening the locking nut 3. A hollowed-out groove can be provided in the middle of the adjusting end 41. The two ends of the hollowed-out groove extend axially to the two ends of the adjusting end, respectively, and connect the threaded hole and the through hole. The hollowed-out groove provides space for the threaded adjusting rod and the optical axis of the connecting end to enter.

[0034] The threaded adjusting rod can be a right-hand thread. When it is necessary to adjust the length of this drive mechanism, first loosen the locking nut 3, and then proceed as follows: Figure 3 Rotate the adjusting end 41 in the direction of the middle arrow to bring it closer to the support frame 2, thereby reducing the length of the drive mechanism, or according to... Figure 3 The reverse rotation adjustment end 41, in the direction of the middle arrow, increases the length of the drive mechanism. By adjusting the length of the drive mechanism, the distance between a point on the edge of the rotating chassis 5 and the support frame can be changed. The extension and retraction direction of the drive mechanism forms an angle with the radial direction of the rotating chassis, thereby driving the rotating chassis to rotate.

[0035] This drive mechanism is telescopic and compact. Due to the limited space between the rotating chassis 5 and the support frame 2, it is difficult to install drive mechanisms such as hydraulic cylinders and screw modules, making it more suitable for belt conveyors. Furthermore, this drive mechanism is easy to maintain, requiring no power supply or hydraulic system. The correction angle can be set manually, significantly reducing maintenance costs. It is also highly responsive, allowing operators to adjust it in real time according to the degree of conveyor belt deviation. In cases of material misalignment or slight frame deformation, if the self-aligning mechanism is found to have an excessive rotation angle, the drive mechanism can be quickly adjusted to rotate the rotating chassis, causing the axial direction of the first, second, and third idlers to form an angle with the direction of conveyor belt operation. The frictional force of the idlers on the conveyor belt generates a component force opposite to the deviation direction, assisting in correcting the conveyor belt position.

[0036] Figure 4 for Figure 1 Cross-sectional view of section KK in the embodiment. Figure 4The diagram shows the structure of the first idler frame 251 and its first chute 15, etc. The structure of the second idler frame 252 and its second chute 16 is the same as that of the first idler frame 251, and its cross-sectional view is as follows. Figure 4 The mirror symmetry of the middle structure is therefore not shown in the accompanying drawings. The following is in conjunction with... Figure 4 The implementation method of this embodiment is described below.

[0037] Optionally, the first and second idler frames can be straight idler frames. The first chute 15 and the second chute 16 in the idler frames can both extend in a straight line and be inclined towards the outside of the self-aligning mechanism, forming a certain angle between them. The front and rear sides of the first and second chutes (the front and rear direction is parallel to the conveying direction of the conveyor belt) are machined with first inclined surfaces 221 with the same inclination angle and opposite directions. The cross-section of the first and second idler frames is a rhomboid structure, and the included angle between the first inclined surfaces can preferably be 90 degrees.

[0038] Compared to traditional curved chutes and roller frames, straight chutes and roller frames are easier to manufacture, which helps reduce production costs. The rhomboid cross-section has a symmetrical first inclined surface, which makes the contact area between the first chutes and the rollers larger. Furthermore, the force between the first inclined surface and the rollers will generate a front-to-back component force, improving the structural strength of the self-aligning roller frame.

[0039] As an alternative embodiment, a connecting groove 17 can be provided at the bottom of the first idler frame 251 and the second idler frame 252. The extending direction of the connecting groove 17 is consistent with the axial direction of the corresponding slide (first slide 15 or second slide 16). A roller base 6 can be provided on the rotating chassis 5 to support the roller 11. Specifically, taking the first idler frame 251 as an example, the first end of the roller base 6 can be fixed to the top of the rotating chassis 5 by bolts, and the second end of the roller base 6 can extend into the first slide 15 through the connecting groove 17 and be rotatably connected to the center hole of the roller 11 through a bearing. The setting of the connecting groove 17 allows the roller base 6 to pass through the bottom of the first and second idler frames and connect to the rotating chassis 5, solving the structural interference problem caused by the roller being directly installed on the top of the rotating chassis 5 in the traditional design. Furthermore, the connecting groove and the sliding groove form a through structure. The width of the connecting groove is greater than the thickness of the roller base, which facilitates the adjustment of the front and rear positions during installation, making it easier to align the roller with the center of the first and second idler frames. During this process, the connecting groove fully exposes the interior of the idler frame, making the installation operation more accurate and saving more time.

[0040] Figure 5 for Figure 1 A cross-sectional view of the split structure of the roller in the embodiment, combined with Figure 5 Explain its implementation method.

[0041] In this embodiment, the roller adopts a split structure design, consisting of a first wheel-shaped split body 211 and a second wheel-shaped split body 212. Both have second inclined surfaces 222 with the same inclination angle but opposite directions on their radially outer sides. The inclination angle of these inclined surfaces matches the first inclined surface 221 of the slide groove, preferably at 45 degrees, resulting in an included angle of 90 degrees. A rotating shaft 20 can be installed on the second end of the roller base 6 that extends into the slide groove (first slide groove 15 or second slide groove 16). The rotating shaft can be perpendicular to the roller base and parallel to the conveying direction of the conveyor belt. The first wheel-shaped split body 211 and the second wheel-shaped split body 212 can be rotatably connected to the rotating shaft 20 via bearings. Furthermore, a sleeve 23 can be installed between the two split bodies to separate them and allow them to rotate relatively independently. At this time, the second inclined surface 222 of each of the first wheel-shaped split body 211 and the second wheel-shaped split body 212 contacts the first inclined surface 221 of the first slide groove 15, forming a double-sided contact support, increasing the contact area and reducing contact stress. The first wheel-shaped component 211 is located on the front side, and the second wheel-shaped component 212 is located on the rear side.

[0042] The first inclined surface is located on the front and rear sides of the first and second slide grooves, and the second inclined surface is located on the front and rear sides of the roller 11. When the user adjusts the rotation angle of the rotating chassis 5, for example, along... Figure 6 Rotate the base 5 counterclockwise in the middle C direction. The front side of the right roller 11 pushes the second roller frame 252 forward, and the rear side of the left roller 11 pushes the first roller frame 251 backward, thereby causing the self-aligning roller frame to rotate counterclockwise. Figure 6 (Central B direction).

[0043] Specifically, the bearings in the first wheel-shaped split body 211 and the second wheel-shaped split body 212 can be deep groove ball bearings. The outer ring of the bearing is fixed in the inner hole of the split body by an elastic retaining ring. The inner ring of the bearing is sleeved on the rotating shaft 20. The opposite sides of the two inner rings abut against each other by a sleeve 23. On the opposite sides of the two inner rings, one side abuts against the step on the rotating shaft, and the other side is fixed by a set screw and a washer.

[0044] The split roller design allows for independent rotation, primarily to achieve miniaturization while maintaining sufficient strength. Using a single-piece roller would require large bearings to achieve the necessary strength, increasing the size of components such as the support frame and raising the height of the self-aligning mechanism, which would then be mismatched with the height of other fixed idlers on the conveyor belt. The independently rotating first and second rollers, separated into two smaller bearings, distribute the load across two smaller bearings, reducing the size of any single bearing.

[0045] This invention utilizes a self-aligning idler frame that rotates in the horizontal plane and oscillates in the vertical direction to achieve multi-degree-of-freedom composite alignment, thus achieving an ideal alignment effect. Compared to idler alignment devices that can only deflect in a single plane, two scenarios will be discussed.

[0046] (1) The idler frame can only rotate perpendicular to the working plane of the conveyor belt. This structure causes the deflection trajectory of the self-aligning idler frame to be orthogonal to the lateral offset direction of the conveyor belt. Although this structure can achieve basic correction function, the correction effect is not good. There is still room for technical optimization in terms of dynamic response speed, angle compensation accuracy and multi-condition adaptability.

[0047] (2) The idler frame only swings in a plane perpendicular to the direction of the conveyor belt. Besides failing to address the problem of spatial compound misalignment, this design may exacerbate system resonance and cause serious damage when encountering serpentine oscillations of the conveyor belt. When the conveyor belt deviates significantly, the swing amplitude of the self-aligning idler frame will exceed the critical value, causing excessive twisting angle of the conveyor belt, potentially leading to material spillage and increasing manual cleaning time. Furthermore, the upper surface of the twisted belt may scrape against the return surface, causing belt surface damage. If the swing stroke is limited to control material spillage, the idler frame is more likely to reach its maximum extent. This means the edge of the conveyor belt will more frequently subject the guide rollers at both ends of the idler frame to continuous periodic impact loads, leading to increased wear on the guide roller surfaces and reduced service life.

[0048] Figure 6 This is a schematic diagram of a correction adjustment method for an idler roller alignment device. (Combined with...) Figure 6 This invention describes the adjustment method of the correction device in one correction scenario.

[0049] First, adjust the drive mechanism to its initial length so that the axis of the idler roller is perpendicular to the direction of the conveyor belt.

[0050] When the conveyor belt deviates slightly, the self-aligning mechanism can automatically correct the belt's deviation. Figure 6 The diagram illustrates a case of conveyor belt misalignment. Arrow A indicates the running direction of conveyor belt 13. When conveyor belt 13 misaligns to the right, the self-aligning mechanism will swing in the direction of the misalignment (e.g., ...). Figure 6 (In the counterclockwise direction indicated by arrow B). As the swing angle increases, the tangential component of the gravity of the conveyor belt and idler frame along the swing trajectory gradually increases. This component is in the opposite direction to the swing direction of the self-aligning mechanism. As the swing angle increases, this tangential component increases until it can prevent the conveyor belt from continuing to deviate, or even correct the deviation angle.

[0051] When the conveyor belt deviates significantly, the self-aligning mechanism can no longer effectively correct the deviation independently, requiring active adjustment of the rotating device to assist in correction. In this case, the rotation angle of the rotating base 5 is adjusted by adjusting the turnbuckle 4. (Continuing from the previous example, if...) Figure 6 (In the counterclockwise direction indicated by the middle arrow C), ultimately causing the idlers (including the first idler 101, the second idler 102, and the third idler 103 (see...)) to... Figure 1 The rotating shaft of the conveyor belt 13 forms an angle with the running direction A of the conveyor belt 13.

[0052] Figure 7 This is a force analysis diagram of the conveyor belt after the rotating chassis rotates. Combined with... Figure 7 This explains the principle of correcting conveyor belt deviation by adjusting the rotation angle of the rotating chassis. At this point, with... Figure 6 With the medium angle as a reference, the conveyor belt deviates to the right, the self-aligning mechanism swings to the right, and the rotating device rotates counterclockwise, causing the right end of the idler roller to be forward and the left end to be backward.

[0053] Figure 7 This is a schematic diagram of the idler frame and conveyor belt from a top-down perspective. The conveyor belt 13 provides a forward traction force F to the idler. This traction force can be decomposed into a component force F1 that causes the idler to rotate and a lateral component force F2. The reaction force F3 of this lateral component is the lateral force exerted by the idler on the conveyor belt. F3 causes the conveyor belt to shift to the left, thereby correcting the tendency of the conveyor belt to shift to the right. The above example illustrates the correction principle of this device using the case of the conveyor belt 13 shifting to the right. The case of shifting to the left will not be described in detail.

[0054] Another effect of the turnbuckle and rotating device design is that when the self-aligning mechanism malfunctions, such as the roller jamming causing the self-aligning roller frame to be unable to swing in the vertical plane, the adjustable turnbuckle can also temporarily give the device horizontal rotational freedom, thus having a certain correction effect, thereby avoiding passive shutdown caused by the failure of this correction device and affecting the progress of the entire working face.

[0055] The technical scope of this invention is not limited to the contents of the above specification. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the scope of this invention.

Claims

1. A multi-degree-of-freedom idler roller correction device, characterized in that, The multi-degree-of-freedom idler roller correction device includes: The support frame (2) is fixedly installed on the belt conveyor; A rotating device is mounted on the support frame (2), and the rotating device is capable of rotating relative to the support frame (2). The rotation plane of the rotating device is parallel to the working plane of the conveyor belt (13) of the belt conveyor. A self-aligning mechanism is provided on the rotating device and is capable of oscillating in a plane perpendicular to the running direction of the conveyor belt (13).

2. The multi-degree-of-freedom idler roller correction device as described in claim 1, characterized in that, An arc-shaped guide rod (14) is fixedly installed on the support frame (2). The rotating device includes a rotating base (5). An arc-shaped sleeve (1) is fixedly installed at the bottom of the rotating base (5). The sleeve (1) and the guide rod (14) are in sliding fit.

3. The multi-degree-of-freedom idler roller correction device as described in claim 2, characterized in that, The two sleeves (1) are distributed along opposite radial directions on the outer edge of the rotating chassis (5).

4. The multi-degree-of-freedom idler roller correction device as described in claim 2, characterized in that, The idler roller correction device also includes a drive mechanism, which includes a threaded adjusting rod (19) and a turnbuckle (4). The turnbuckle (4) includes an adjusting end (41) and a connecting end (42). One end of the threaded adjusting rod (19) is hinged to the support frame (2), and the other end is screwed to the adjusting end (41). The adjusting end (41) is rotatably connected to the connecting end (42), and the connecting end (42) is hinged to the rotating chassis (5). When the adjusting end (41) rotates, the adjusting end (41) can move along the axial direction of the threaded adjusting rod (19), thereby driving the rotating chassis (5) to rotate.

5. The multi-degree-of-freedom idler roller correction device as described in claim 2, characterized in that, The self-aligning mechanism includes a self-aligning idler frame, a chute is provided inside the self-aligning idler frame, and a roller (11) is provided on the top of the rotating chassis (5). The roller (11) can roll along the chute, and the extension direction of the chute is perpendicular to the running direction of the conveyor belt (13).

6. The multi-degree-of-freedom idler roller correction device as described in claim 5, characterized in that, Two rollers (11) are distributed on both sides of the rotating chassis (5) along opposite radial directions. The self-aligning roller frame includes a first roller frame (251) and a second roller frame (252). The first roller frame (251) is provided with a first groove (15), and the second roller frame (252) is provided with a second groove (16). The first idler frame (251) and the second idler frame (252) are symmetrically arranged at both ends of the self-aligning idler frame, and the two rollers (11) are slidably connected to the first groove (15) and the second groove (16) respectively.

7. The multi-degree-of-freedom idler roller correction device as described in claim 6, characterized in that, The first slide (15) and the second slide (16) extend in a straight line, the first slide (15) and the second slide (16) are inclined toward the outside of the self-aligning mechanism, and a certain angle is formed between the two slides; The first chute (15) and the second chute (16) each have a first inclined surface (221) with the same inclination angle and opposite directions on both sides in the front-back direction, and the front-back direction is parallel to the running direction of the conveyor belt (13).

8. The multi-degree-of-freedom idler roller correction device as described in claim 6, characterized in that, The bottom of the first roller frame (251) and the second roller frame (252) is provided with a connecting groove (17), and the extending direction of each connecting groove (17) is consistent with the axial direction of the first slide groove (15) or the second slide groove (16) of the roller frame to which it is located. The roller (11) and the rotating chassis (5) are connected by a roller base (6). The first end of the roller base (6) is fixedly connected to the rotating chassis (5), and the second end of the roller base (6) extends into the sliding groove through the connecting groove (17) and is rotatably connected to the roller (11).

9. The multi-degree-of-freedom idler roller correction device as described in claim 8, characterized in that, The second end of the roller base (6) is fixedly connected to the rotating shaft (20). The roller (11) includes a first wheel-shaped part (211) and a second wheel-shaped part (212). The outer radial sides of the two are provided with second inclined surfaces (222) with the same inclination angle and opposite directions. The first wheel-shaped part (211) and the second wheel-shaped part (212) are each connected to the rotating shaft (20) through bearings (24). A sleeve (23) is provided between the first wheel-shaped part (211) and the second wheel-shaped part (212), the sleeve (23) separating the first wheel-shaped part (211) and the second wheel-shaped part (212) so that the two can rotate relatively independently.

10. The multi-degree-of-freedom idler roller correction device as described in claim 6, characterized in that, The first idler frame (251) and the second idler frame (252) are connected by a third idler frame (253). The first idler frame (251) has a first idler (101) on its first side, the second idler frame (252) has a second idler (102) on its first side, and the third idler frame (253) has a third idler (103) on its second side. The first side is defined as the upstream of the running direction of the conveyor belt (13), and the second side is the downstream. The outer ends of the first roller frame (251) and the second roller frame (252) are provided with a baffle roller (8), and the rotation axis of the baffle roller (8) is perpendicular to the rotation axis of the first roller (101) or the second roller (102) on the same side. The top of the baffle roller (8) is provided with a baffle plate (26), and the baffle plate (26) is higher than the bearing surface of the first roller (101) or the second roller (102) on the same side.

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