Buffer roll, transport system and method of assembling a buffer roll
By using reinforcing plugs and reinforcing rings in the buffer roller, the problems of complex production and cumbersome assembly of existing buffer rollers are solved, achieving efficient impact absorption and simplified manufacturing and maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- RULLI RULMECA
- Filing Date
- 2024-02-23
- Publication Date
- 2026-06-09
AI Technical Summary
Existing shock absorbers are complex and costly to produce, and their assembly and maintenance are cumbersome and difficult to simplify effectively.
The structure employs a coreless reinforcing plug and reinforcing ring, creating a high-pressure sealing effect between the tubular support element and the elastic plug, thus avoiding the need for processing the external tubular element enclosure and simplifying the assembly process.
This technology enables highly efficient impact absorption by the buffer rollers, simplifies the manufacturing, assembly, and maintenance processes, and improves product quality and production efficiency.
Smart Images
Figure CN122180641A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the general technical field of buffer rollers for conveyor belts.
[0002] More specifically, the present invention relates to the technical field of shock rollers for conveyor belts, which are capable of absorbing large impacts, are structurally robust, and have improved durability. The present invention relates to shock rollers for conveyor belts that improve resistance to deformation under loads, and particularly improves the reliability of the damper, which dampens impacts on transported objects or falling materials. Background Technology
[0003] In a conveyor belt, there are usually different zones depending on the specific function of the area required to complete the transport of materials.
[0004] Primarily, there may be an "impact zone," where material from other conveyor belts and / or unloading systems is loaded onto the belt or conveyor and first passes through a hopper or screening system. This zone is called the "impact" zone because an impact occurs between the conveyor belt support rollers and the falling material in this zone. The falling material can have different particle sizes and can fall from different heights. This zone typically has a reduced length.
[0005] In addition, there is a "transport zone." In the transport zone, which is often the longest section of the conveyor belt, materials are also transported over long distances. In this zone, apart from the forces exerted by the weight of the transported materials, belt tension, and forces generated by vertical and horizontal bends, there are no external forces acting on the conveyor belt.
[0006] In addition, there is a "transition zone." In this zone, the conveyor belt switches from a flat position (determined by the winding drum) to a sunken position through some constrained angular change structures. This zone typically has a reduced length.
[0007] Finally, there is a "return zone". The return zone is the return branch of the conveyor belt. At the return zone, a series of flat or V-shaped inclined stations support the (unloaded) belt to the rear drum, ending the conveyor belt's progress and bringing the conveyor belt back to the material loading area in the impact zone.
[0008] To limit the impact effect of the material on the rollers themselves, the support and / or guide rollers of the conveyor belt in the "impact zone" are usually covered by a series of rings or plugs made of rubber with sufficient thickness and resistance.
[0009] Therefore, the buffer roller is stressed not only by the load on the material, but also by the dynamic force generated on the roller when the load falls onto the conveyor belt, such as... Figure 1 What is depicted.
[0010] Rollers are known where, to limit the impact effects caused by the impact of the transported material, such as the impact effects caused by material falling onto a conveyor belt supported by the roller, the outer cladding of the roller is directly covered with a synthetic or rubber material, which is vulcanized directly onto the roller surface. While these rollers are satisfactory from several perspectives, these known solutions are very complex to manufacture and therefore expensive, as the entire roller needs to be replaced if the covered cladding is damaged or worn.
[0011] Document KR100592483, "Impact Roller for Conveyor," discloses a shock-absorbing roller suitable for rolling during shock absorption. The design features a tubular support element capable of free rotation on a fixed shaft supported by a structure. The rotatable tubular element has multiple rubber rings mounted on a surrounding plate. The assembly is hollow at the end of the surrounding plate, where a stop ring is embedded to prevent material-holding wedges from slipping and to constrain the rubber rings due to a reverse taper on the side facing the stop ring.
[0012] While satisfactory from some perspectives, this approach involves axial restriction of the movement of the constrained ring (achieved here by a metal wedge and a stop ring, which serves as an elastic element connecting to the hollow portion obtained in the rotatable tubular element). This approach requires precise machining of the shroud of the rotatable tubular element, which increases the probability of assembly errors due to the need for accurate positioning and precise structural tolerances of the constrained ring, complicates the assembly process, and also creates discontinuous surfaces on the shroud of the rotatable tubular element that are almost like blades, often damaging the inner surface of the rubber ring when it is assembled onto the shroud.
[0013] Another such scheme is known from CN202181088U.
[0014] Document KR20090075966, "Impact Roller for Conveyor," discloses an impact roller for a conveyor belt, developed to prevent foreign objects from wedging between elastic rings that absorb and dampen impacts. The design includes an impact roller for a conveyor belt comprising a shaft, a roller tube keyed to the shaft via bearings, and impact-absorbing elements for support and damping mounted on the roller tube. The support and damping elements include an inner cylindrical ring, an outer cylindrical ring, and an impact-absorbing damper sandwiched between the inner and outer rings. The corrugated shape of the damper allows the outer cylindrical ring of each element to be positioned to abut against the outer ring of adjacent elements, thereby preventing foreign objects from inserting between the elements.
[0015] The purpose of this scheme is to avoid axial deformation of the inner ring and the outer ring (which can be vaguely reinforced by reinforcing elements) and to concentrate the deformation on the intermediate damper.
[0016] The solution is satisfactory from all angles; however, its construction and maintenance are extremely complex, requiring the manufacture of elastic rings with extremely complex geometries, which necessitates the use of complex mold processes with different undercuts.
[0017] Furthermore, this solution requires a highly complex assembly process because the inner ring of each elastic ring is constructed to restrict the radial deformation of the inner ring, making the assembly of each individual ring onto the roller tube extremely complex. Therefore, the production and assembly process of this solution is equally cumbersome and costly.
[0018] Other similar schemes are also known from KR100782604. Summary of the Invention
[0019] Therefore, the purpose of this invention is to overcome the shortcomings of the prior art and to enable the buffer roller to efficiently absorb impacts while simplifying manufacturing, assembly and maintenance.
[0020] These and other objectives are achieved by the buffer roller according to claim 1, the material transport system according to claim 11, and the method of assembling the buffer roller according to claim 13.
[0021] Some advantageous implementations are for the purposes of the dependent claims.
[0022] Based on the general implementation methods and variations described above and below, the following advantages can be obtained.
[0023] This innovative approach teaches that by utilizing the high pressure formed between the reinforced plug foot and the tubular support element, a "sealing effect" can be achieved, allowing the constrained plug to remain in place without requiring the processing of the outer tubular element enclosure of the tubular support element.
[0024] The fundamental difference between the buffer rollers of the prior art and the buffer rollers of the present invention lies primarily in how the constrained elastic plug remains in place.
[0025] Specifically.
[0026] When using a coreless / reinforcing ring-less elastic plug, a metal stop is required to keep the restrained elastic plug in place. This is because the pressure generated by the interference (typically about 5 mm to 8 mm) between the outer diameter of the tubular support element and the inner diameter of the elastic plug is lost in the rubber deformation of the elastic plug, which changes its size and diameter.
[0027] The resulting deformation prevents the constrained elastic plug from remaining in place throughout the product's lifespan, thus increasing impact and stress.
[0028] The difference lies in the proposed use of reinforcing plugs and rings, where the reinforcing plugs are located outside the constrained elastic plug to provide a seal for the constrained plug on the tubular support element.
[0029] This is because the pressure generated by the interference between the outer diameter of the tubular support element and the inner diameter of the reinforcing plug is converted into increased local pressure between the reinforcing ring and the outer tubular element enclosure.
[0030] This pressure deforms the elastic material in the space (the foot of the reinforcing plug), significantly increasing the contact pressure between the two components. This creates a preloaded sealing effect in these unloaded areas of the elastic material, counteracting interference and creating clearance that allows the reinforcing plug to move from its original position. However, the outer portion of the reinforcing ring remains deformable and capable of damping impacts, and most importantly, without altering the impact absorption and damping performance of the cost-effective elastic plug.
[0031] This ensures the sealing of the constrained elastic plug throughout the entire lifespan of the buffer rollers produced in this paper, which are required to be protected.
[0032] Because at least one reinforcing plug is provided, which is securely connected to the tubular support element due to its geometry, it blocks at least one elastic plug and avoids the requirement for machining of the outer tubular element enclosure, which preferably remains cylindrical and is smooth, thereby facilitating the assembly process of the plug. This not only allows for a simplified and faster construction and assembly process, but also for an even more simplified assembly process due to the reduction of machining steps.
[0033] In fact, in the process of assembling a conventional roller by blocking the constrained elastic plug with a stopper received in the seating portion of the outer tubular element enclosure, the roller must first be fitted with the elastic plug, then moved to the welding station of the stopper, and then to the spraying station, which are usually far away from them, or even outside the assembly area. Although the elastic plug, which is known and inexpensive, is used in this conventional solution, the proposed solution avoids the need for machining before the assembly of the plug, thus avoiding the welding of the stopper, which is no longer used here, and includes spraying as a step before assembling the plug onto the tubular support element.
[0034] Therefore, compared to existing technologies, the buffer roller proposed in this paper does not require a subsequent welding process because the elastic plug is kept in place during normal use by an external reinforcing plug.
[0035] From a production perspective, this brings a huge competitive advantage: 1. In the case of spray coating rollers, the management of this process can be streamlined in the pre-assembly steps, thereby achieving significant advantages in production economies of scale. In all the above cases, the rollers can be pre-coated before the plug parts are assembled; 2. Furthermore, product quality will be improved: no longer limited to end spraying (usually liquid coating), this solution improves the corrosion resistance of the roller by powder spraying the entire outer tubular element enclosure. 3. Furthermore, production space is optimized: in terms of logistics, assembled products no longer need to move between different departments; instead, the flow will be linear. Once the plug is pressed to assemble it onto the tubular support element, the finished buffer roller can be delivered to the customer. Attached Figure Description
[0036] Referring to the accompanying drawings, further features and advantages of the invention will become apparent from the following description of preferred embodiments given by non-limiting indication, in which: Figure 1 A schematic side view of the first unloading end portion of a first conveyor belt, for example used to transport crushed stone (generally referred to herein as falling material), is shown. The first unloading end portion unloads the crushed stone into the hopper of the impact zone of a second conveyor belt, which is supported by a buffer roller. Figure 2 An isometric view of the buffer roller is shown, which shows the centrally constrained elastic plug and two opposite reinforcing plugs located at opposite ends of the constrained elastic plug. Figure 3 It shows Figure 2 An isometric view of the separated portion of the buffer roller; Figure 4 It shows along Figure 2 A cross-sectional view of the roller in the axial-radial plane; Figure 5 A cross-sectional view of the axial-radial plane based on a buffer roller according to another embodiment is shown; Figure 6 An axial view of a buffer roller without elastic plugs and reinforcing plugs and an assembly tool adjacent to the buffer roller is shown. Figure 7 A cross-sectional view of the axial-radial plane is shown according to the assembly steps of the buffer roller and the assembly tool adjacent to the buffer roller, which is shown here as without elastic plug and reinforcing plug; Figure 8 A cross-sectional view of the axial-radial plane according to a further assembly step is shown, wherein the reinforcing plug is assembled onto the assembly tool; Figure 9A cross-sectional view of the axial-radial plane according to a further assembly step is shown, wherein, Figure 8 The reinforcing plug is pushed along the assembly tool by the presser indicated by reference numeral 40 in the figure until the reinforcing plug is deformed to the size of the outer tubular element enclosure; Figure 10 A cross-sectional view of the axial-radial plane according to an additional assembly step is shown, in which... Figure 8 The reinforcing plug is pushed along the outer tubular element enclosure by the extruder until the reinforcing plug is brought into the desired position; Figure 11 A cross-sectional view of the axial-radial plane is shown according to an additional assembly step, wherein multiple elastic plugs are assembled onto the assembly tool; Figure 12 A cross-sectional view of the axial-radial plane according to a further assembly step is shown, wherein, Figure 11 Multiple elastic plugs are pushed along the assembly tool by the extruder until the multiple elastic plugs are deformed to the size of the outer tubular element enclosure, and thus the multiple elastic plugs are pushed along the outer tubular element enclosure by the extruder until the multiple elastic plugs are brought into the desired position, where they are constrained together with the already positioned reinforcing plugs; Figure 13 A cross-sectional view of the axial-radial plane according to a further assembly step is shown, wherein, Figure 11 and Figure 12 The operation is repeated until all the desired elastic plugs are loaded onto the outer tubular element shroud. Figure 8 , Figure 9 and Figure 10 The operation is repeated until all the reinforcing plugs are fitted between the elastic plugs or to the ends of the elastic plugs to block the constrained elastic plugs. Figure 14 A cross-sectional view of the axial-radial plane is shown according to additional assembly steps, in which the elastic plug deforms as it is pushed along the assembly tool during the three assembly steps; Figure 15 A cross-sectional view of the axial-radial plane is shown according to additional assembly steps, in which the reinforcing plug deforms as it is pushed along the assembly tool during the three assembly steps. Detailed Implementation
[0037] The invention will now be described in detail with reference to the accompanying drawings to enable those skilled in the art to implement and utilize it. Various modifications to the described embodiments will be apparent to those skilled in the art, and the general principles described can be applied to other embodiments and applications without departing from the scope of protection of the invention as defined in the appended claims. Therefore, the invention should not be considered limited to the described and illustrated embodiments, but should be given the broadest possible protection in accordance with the described and claimed features.
[0038] Unless otherwise defined, all technical and scientific terms used herein have the meanings commonly used by one of ordinary skill in the art to which this invention pertains. In the event of conflict, this specification and the definitions provided therein shall be binding. Furthermore, these examples are provided for illustrative purposes only and should not be considered limiting.
[0039] To facilitate understanding of the embodiments described herein, specific embodiments will be referenced and described using specific language. The terminology used herein is for describing specific embodiments only and is not intended to limit the scope of the invention.
[0040] According to a general embodiment, the buffer roller 1 for the conveyor belt 2 includes a tubular support element 5 extending in the axial direction AA and adapted to rotate about a rotation axis XX. The tubular support element 5 includes an outer tubular element enclosure or tubular baffle, denoted by reference numeral 57, which defines a tubular element support surface 52 having a predetermined support surface diameter Ds. The tubular support element 5 is externally supported by an elastic cover 7 adapted to receive impacts caused by falling material 8 onto the buffer roller 1.
[0041] The elastic cover 7 includes at least one elastic plug 9, which is elastically deformable at least in the radial direction RR orthogonal to the axial direction AA.
[0042] The elastic plug 9 includes an internal tubular elastic plug surface 10.
[0043] The elastic plug 9, having the inner tubular elastic plug surface 10, is mounted on the tubular element support surface 52 of the tubular support element 5.
[0044] When the elastic plug 9 is detached from the tubular support element 5 and is in a non-wearing, stationary condition, the inner tubular elastic plug surface 10 has an elastic plug inner diameter Dite in its radial cross section that is smaller than the predetermined support surface diameter Ds.
[0045] The elastic cover 7 includes at least one reinforcing plug 11 made of an elastic material; wherein the reinforcing plug 11 includes a reinforcing plug base 12.
[0046] The base 12 of the reinforcing plug includes at least one annular reinforcing ring 13 made of a material different from that of the reinforcing plug 11; and wherein the reinforcing plug 11 includes an inner tubular reinforcing plug surface 14.
[0047] The reinforcing plug 11, having the internal tubular reinforcing plug surface 14, is fitted onto the tubular element support surface 52 of the tubular support element 5.
[0048] When the reinforcing plug 11 is removed from the tubular support element 5 and is in a static, unworn condition, the inner tubular reinforcing plug surface 14 has a reinforcing plug inner diameter Ditr smaller than the predetermined support surface diameter Ds and a reinforcing plug inner diameter Ditr larger than the elastic plug inner diameter Dite in its radial cross section.
[0049] According to an embodiment, the tubular support element 5 includes at least one tubular end plate 53.
[0050] The reinforcing plug 11 is placed near the end 53 of the tubular enclosure.
[0051] According to an embodiment, the tubular support element 5 includes two opposite tubular sheath ends 53.
[0052] Each tubular end near the opposite tubular end 53 is provided with a reinforcing plug 11.
[0053] According to an embodiment, the tubular support element 5 includes two opposite tubular endplates 53 and a central tubular endplate region 54, which is configured to be substantially equidistant from the two opposite tubular endplates 53.
[0054] Each tubular end of the tubular enclosure near the opposite end 53 is provided with a reinforcing plug 11.
[0055] At least one reinforcing plug 11 is provided at the central tubular enclosure area 54.
[0056] According to an embodiment, the elastic cover 7 includes a plurality of elastic plugs 9 placed side by side.
[0057] Two opposite reinforcing plugs 11 are provided at the ends of the plurality of elastic plugs 9.
[0058] According to an embodiment, the elastic cover 7 includes a plurality of adjacent elastic plugs 9 that are in contact with each other, that is, the elastic cover 7 includes a plurality of adjacent elastic plugs 9 that are constrained in pairs.
[0059] Two opposing reinforcing plugs 11 are provided at the ends of the plurality of elastic plugs 9 to retain the plurality of elastic plugs 9.
[0060] According to an embodiment, the elastic cover 7 includes a plurality of first elastic plugs 9 arranged side by side; and wherein two opposite reinforcing plugs 11 arranged side by side are provided at the ends of the plurality of first elastic plugs 9. The elastic cover 7 includes a plurality of second elastic plugs 9 arranged side by side; and wherein a first end of the plurality of second elastic plugs 9 arranged side by side is positioned to contact one of the reinforcing plugs 11 placed at the ends of the plurality of first elastic plugs 9; and wherein another reinforcing plug 11 is placed at the opposite ends of the plurality of second elastic plugs 9.
[0061] According to an embodiment, the elastic plug 9 has an annular elastic plug body 15.
[0062] According to an embodiment, the elastic plug 9 has an annular, one-piece elastic plug body 15 made of elastic material.
[0063] According to an embodiment, the elastic plug 9 has an annular elastic plug body 15, which does not have an annular insert made of a different material.
[0064] According to an embodiment, the elastic plug 9 has an annular elastic plug body 15, which does not have an annular insert made of different materials, such that when the elastic plug 9 is assembled onto the tubular support element 5, substantially all of the material of the elastic plug body 15 is subjected to circumferential stress.
[0065] According to an embodiment, the elastic plug 9 has an annular elastic plug body 15.
[0066] In the cross-section of the annular extension of the annular elastic plug body 15, the annular elastic plug body 15 has: an elastic plug foot 16, which contacts the tubular support element 5; an elastic plug head 17, which forms an outer impact surface 18 on the radially outer side; and an elastic plug post 19, which is radially disposed between the elastic plug foot 16 and the elastic plug head 17.
[0067] According to an embodiment, the elastic plug 9 has an annular elastic plug body 15.
[0068] In the cross-section of the annular extension of the annular elastic plug body 15, the annular elastic plug body 15 has: an elastic plug foot 16, which contacts the tubular support element 5; an elastic plug head 17, which forms an outer impact surface 18 on the radially outer side; and an elastic plug post 19, which is radially disposed between the elastic plug foot 16 and the elastic plug head 17.
[0069] The elastic plug 19 has an axial extension AA that is transverse to the radial extension RR of the elastic plug 19, and the axial extension AA of the elastic plug 19 is less than the axial extension of the elastic plug foot 16 and the elastic plug head 17.
[0070] According to an embodiment, the elastic plug 9 has an annular elastic plug body 15.
[0071] In the cross-section of the annular extension of the annular elastic plug body 15, the annular elastic plug body 15 has: an elastic plug foot 16, which contacts the tubular support element 5; an elastic plug head 17, which forms an outer impact surface 18 on the radially outer side; and an elastic plug post 19, which is radially disposed between the elastic plug foot 16 and the elastic plug head 17.
[0072] The resilient foot portion 16 has an axial extension AA that is transverse to the radial extension RR of the resilient foot portion 16, and the axial extension AA is greater than the axial extension of the resilient head 17.
[0073] According to an embodiment, the elastic cover 7 includes a plurality of first elastic plugs 9 placed side by side.
[0074] Each elastic plug 9 has an annular elastic plug body 15; wherein, in the cross-section of the annular extension of the annular elastic plug body 15, the annular elastic plug body 15 has: an elastic plug foot 16, the elastic plug foot 16 contacting the tubular support element 5; an elastic plug head 17, the elastic plug head 17 forming an outer impact surface 18 on the radially outer side; and an elastic plug post 19, the elastic plug post 19 being disposed radially between the elastic plug foot 16 and the elastic plug head 17.
[0075] In addition, a gap is provided between one elastic plug head 17 and the elastic plug head 17 adjacent to the elastic plug head 17.
[0076] Therefore, the column is narrower and allows for radial elastic deformation and axial clearance for axial elastic deformation.
[0077] According to an embodiment, the reinforcing plug 11 has an annular reinforcing plug body 20.
[0078] According to an embodiment, the reinforcing plug 11 has an annular one-piece reinforcing plug body 20, which is made of an elastic material except for the reinforcing ring 13 associated with the reinforcing plug base 12.
[0079] According to an embodiment, the reinforcing plug 11 has an annular one-piece reinforcing plug body 20, which is made of an elastic material except for the material of the reinforcing ring 13 bonded to the reinforcing plug base 12.
[0080] According to an embodiment, the reinforcing plug 11 has an annular one-piece elastic plug body 20, which is made of an elastic material except for the reinforcing ring 13, which is made of a metallic material and associated with the base 12 of the reinforcing plug.
[0081] According to an embodiment, the reinforcing plug 11 has an annular one-piece reinforcing plug body 20, which, except for the reinforcing ring 13 associated with the reinforcing plug base 12, is made of an elastic material such that the reinforcing plug foot 21 is located between the reinforcing ring 13 and the inner tubular reinforcing plug surface 14.
[0082] According to an embodiment, the reinforcing plug 11 has an annular, single-piece reinforcing plug body 20. Except for the reinforcing ring 13 associated with the reinforcing plug base 12, the reinforcing plug body 20 is made of an elastic material such that the reinforcing plug foot 21 is located between the reinforcing ring 13 and the inner tubular reinforcing plug surface 14. Thus, when the reinforcing plug 11 is assembled onto the tubular support element 5, the material of the reinforcing plug foot 21 is generally subjected to circumferential stress, thereby preloaded with tension suitable for preventing the impact of falling material 8 on the reinforcing plug 11 from causing the inner tubular reinforcing plug surface 14 on the opposite side of the impact to detach from the tubular element support surface 52 of the tubular support element.
[0083] According to an embodiment, the reinforcing plug 11 has an annular reinforcing plug body 20.
[0084] In the cross-section of the annular extension of the annular reinforcing plug body 20, the annular reinforcing plug body 20 has: a reinforcing plug foot 21, which is an internal part of the reinforcing plug base 12 and contacts the tubular support element 5; a reinforcing plug head 22, which forms an external impact surface 23 of the reinforcing plug in the radial direction; and a reinforcing plug post 24, which is radially disposed between the reinforcing plug base 12 and the reinforcing plug head 22.
[0085] According to an embodiment, the reinforcing plug 11 has an annular reinforcing plug body 20.
[0086] In the cross-section of the annular extension of the annular reinforcing plug body 20, the annular reinforcing plug body 20 has: a reinforcing plug foot 21, which is an internal part of the reinforcing plug base 12 and contacts the tubular support element 5; a reinforcing plug head 22, which forms an external impact surface 23 of the reinforcing plug in the radial direction; and a reinforcing plug post 24, which is radially disposed between the reinforcing plug base 12 and the reinforcing plug head 22.
[0087] The reinforcing plug 24 has an axial extension AA in the transverse direction of the radial extension RR of the reinforcing plug 24, which is less than the axial extension AA of the reinforcing plug base 12 and the reinforcing plug head 22.
[0088] According to an embodiment, the reinforcing plug 11 has an annular reinforcing plug body 20.
[0089] In the cross-section of the annular extension of the annular reinforcing plug body 20, the annular reinforcing plug body 20 has: a reinforcing plug foot 21, which is an internal part of the reinforcing plug base 12 and contacts the tubular support element 5; a reinforcing plug head 22, which forms an external impact surface 23 of the reinforcing plug in the radial direction; and a reinforcing plug post 24, which is radially disposed between the reinforcing plug base 12 and the reinforcing plug head 22.
[0090] The reinforcing plug base 12 has an axial extension AA that is transverse to the radial extension RR of the reinforcing plug base 12, and the axial extension AA is greater than the axial extension AA of the reinforcing plug head 22.
[0091] Therefore, the column is narrower in the axial direction and allows for radial elastic deformation and axial clearance for axial elastic deformation.
[0092] According to an embodiment, when the inner tubular elastic plug surface 10 is fitted onto the tubular element support surface 52 of the tubular support element 5, the elastic plug 9 is connected to the tubular element support surface 52 by interference. For example, the interference is between 7 mm and 11 mm.
[0093] According to an embodiment, when the internal tubular reinforcing plug surface 14 is fitted onto the tubular element support surface 52 of the tubular support surface 5, the reinforcing plug 11 is connected to the tubular element support surface (52) by interference. For example, the interference is between 2 mm and 5 mm.
[0094] According to an embodiment, the reinforcing ring 13 is made of a material with a greater elongation resistance than the material of the reinforcing plug 11.
[0095] According to an embodiment, the reinforcing ring 13 is made of steel.
[0096] According to an embodiment, the reinforcing ring 13 is made of spring steel.
[0097] According to an embodiment, the reinforcing plug foot 21 is made of an elastic material that allows the reinforcing plug 11 to deform, thereby changing the internal tubular reinforcing plug surface 14 of the reinforcing plug 11 from a diameter of Ditr to a diameter of Ds.
[0098] According to an embodiment, the reinforcing plug foot 21 includes an expansion opening 27, and the reinforcing plug foot 21 includes, for example, an axial groove, and the expansion opening 27 facilitates the elastic deformation of the reinforcing plug foot 21.
[0099] According to an embodiment, the buffer roller 1 includes a shaft 3 extending along a rotation axis XX, the rotation axis XX defining the axial direction AA.
[0100] The shaft 3 is adapted to support the buffer roller 1 at the support structure 4.
[0101] According to an embodiment, the buffer roller 1 includes a shaft 3 extending along a rotation axis XX, which defines the axial direction AA.
[0102] The buffer roller 1 includes at least one end support 6, which is connected to the tubular support element 5 and rotatably attached to the support structure 4.
[0103] According to an embodiment, the buffer roller 1 includes a shaft 3 extending along a rotation axis XX, which defines the axial direction AA.
[0104] The buffer roller 1 includes at least one end support 6, which is connected to the tubular support element 5 and rotatably attached to the shaft 3, thereby allowing the tubular support element 5 to rotate about the shaft 3 supported by the support structure 4.
[0105] According to an embodiment, the buffer roller 1 includes a shaft 3 extending along a rotation axis XX, which defines the axial direction AA.
[0106] The buffer roller 1 includes at least one end support 6, which is connected to the tubular support element 5 and rotatably attached to the support structure 4.
[0107] A rolling bearing 25 is embedded between the shaft 3 and the end support 6.
[0108] According to an embodiment, the buffer roller 1 includes a shaft 3 extending along a rotation axis XX, which defines the axial direction AA.
[0109] The buffer roller 1 includes at least one end support 6, which is connected to the tubular support element 5 and rotatably attached to the support structure 4; and wherein A rolling bearing 25 is embedded between the shaft 3 and the end support 6. The rolling bearing 25 is separated from the environment outside the buffer roller 1 by a sealing device 26.
[0110] The present invention also relates to a material transport system 30, which includes at least one buffer roller 1 defined by any of the embodiments described above.
[0111] According to an embodiment, the material transport system 30 includes at least one conveyor belt 2 supported by at least one buffer roller 1.
[0112] The present invention also relates to a method for assembling a buffer roller 1, the method comprising the following steps: - Provide a tubular support element 5, which extends in the axial direction AA and is adapted to rotate about the rotation axis XX; the tubular support element 5 includes an outer tubular element enclosure 57, which defines a tubular element support surface 52 having a predetermined support surface diameter Ds; - Provide at least one elastic plug 9, the at least one elastic plug 9 being capable of elastic deformation at least in a radial direction RR orthogonal to the axial direction AA; the elastic plug 9 includes an internal tubular elastic plug surface 10; - Provides at least one reinforcing plug 11 made of an elastic material; wherein the reinforcing plug 11 includes a reinforcing plug base 12; the reinforcing plug base 12 includes at least one annular reinforcing ring 13 made of a material different from the material of the reinforcing plug 11; and wherein the reinforcing plug 11 includes an inner tubular reinforcing plug surface 14. - An assembly tool 31 is provided, comprising: a first tubular portion 32 having a first tool portion outer diameter Deu; and a second ramp portion 33 having an outer surface that transitions from the first tool portion outer diameter Deu to the support surface diameter Ds; - The assembly tool 31 is brought close to the tubular support element 5 through a larger diameter of the assembly tool 31 that is equal to the diameter Ds of the support surface; - The at least one elastic plug 9 is fitted onto the first tubular portion 32 with a clearance. - For example, the elastic plug 9 is pushed along the second ramp portion 33 by the presser 40 so that the inner tubular elastic plug surface 10 is deformed to the diameter Ds of the support surface; - For example, the elastic plug 9 is slid along the tubular support element 5 to a desired position by means of the presser 40; - The at least one reinforcing plug 9 is fitted onto the first tubular portion 32 with a clearance. - For example, by pushing the reinforcing plug 11 along the second ramp portion 33 with the presser 40, the surface 14 of the inner tubular reinforcing plug is deformed to the diameter Ds of the supporting surface; - For example, the reinforcing plug 9 is slid along the tubular support element 5 to the desired position by pressing the presser 40.
[0113] According to variations of this method, the following additional steps are included: - The plurality of elastic plugs in the at least one elastic plug 9 are assembled onto the first tubular portion 32 with a clearance. - For example, by pressing the presser 40 along the second ramp portion 33 once or simultaneously, the plurality of elastic plugs in the at least one elastic plug 9 are pushed so that the inner tubular elastic plug surface 10 of each elastic plug 9 is deformed to the diameter Ds of the support surface; - For example, by pressing the presser 40 once or simultaneously, the plurality of elastic plugs in the at least one elastic plug 9 are slid along the tubular support element 5 to the desired position; - The at least one reinforcing plug 11 is fitted onto the first tubular portion 32 with a clearance. - For example, by pushing the reinforcing plug 11 along the second ramp portion 33 with the presser 40, the surface 14 of the inner tubular reinforcing plug is deformed to the diameter Ds of the supporting surface; - For example, by pressing the presser 40, the reinforcing plug 9 is slid along the tubular support element 5 until it is positioned against the outermost of the plurality of elastic plugs that are at least one elastic plug 9.
[0114] According to variations of the method, the method further includes the following additional steps: The spraying step is performed before the step of assembling the at least one elastic plug 9 and the at least one reinforcing plug 11.
[0115] Figure Labels 1 Buffer Roller 2 conveyor belts 3-axis 4. Support structure for supporting the buffer roller 5 tubular support elements 6 end support components 7. Flexible Covering 8 Falling Materials 9 elastic plugs 10 Internal tubular elastic plug surface 11 Reinforced plugs 12. Reinforce the base of the plug 13 Reinforcing Rings 14 Internal tubular reinforced plug surface 15 Elastic plug body 16 elastic foot 17. Elastic plug head 18 External Impact Surfaces 19 elastic plugs 20 reinforced plug body 21 Reinforced plug foot 22 Reinforced plug head 23. External impact surface of the reinforced plug 24 reinforced plugs 25 rolling bearing 26 Sealing device 27. Expanded opening at the reinforced plug foot 30 Material Transportation System 31 Assembly Tools 32 First tubular section 33 Second Slope Section 40 Press Pusher 52 tubular element support surface 53. End of tubular coffered plate 54 Central tubular enclosure area 57. Tubular enclosure or external tubular element enclosure Ds support surface diameter Dite static elastic plug inner diameter Ditr Static Reinforcement Plug Inner Diameter Deu first tool part outer diameter.
Claims
1. A buffer roller (1) for a conveyor belt (2), the buffer roller (1) comprising: A tubular support element (5) extends in the axial direction (AA) and is adapted to rotate about a rotation axis (XX); The tubular support element (5) includes an outer tubular element enclosure (57) that defines a tubular element support surface (52) having a predetermined support surface diameter (Ds). The tubular support element (5) is externally supported by an elastic cover (7), which is adapted to receive the impact on the buffer roller (1) caused by the falling material (8). The elastic cover (7) includes at least one elastic plug (9), which is capable of elastic deformation in at least a radial direction (RR) orthogonal to the axial direction (AA); the elastic plug (9) includes an inner tubular elastic plug surface (10). The elastic plug (9) is assembled onto the tubular element support surface (52) of the tubular support element (5) through the inner tubular elastic plug surface (10); And wherein, when the elastic plug (9) is detached from the tubular support element (5) and is in a stationary condition without wear, the inner tubular elastic plug surface (10) has an elastic plug inner diameter (Dite) smaller than the predetermined support surface diameter (Ds) in the radial section of the inner tubular elastic plug surface (10). Its features are, The elastic cover (7) includes at least one reinforcing plug (11) made of an elastic material; wherein the reinforcing plug (11) includes a reinforcing plug base (12); the reinforcing plug base (12) includes at least one annular reinforcing ring (13) made of a material different from that of the reinforcing plug (11); and wherein the reinforcing plug (11) includes an inner tubular reinforcing plug surface (14). The reinforcing plug (11) is assembled onto the tubular support surface (52) of the tubular support element (5) via the inner tubular reinforcing plug surface (14). And wherein, when the reinforcing plug (11) is detached from the tubular support element (5) and is in a static condition without wear, the inner tubular reinforcing plug surface (14) has a reinforcing plug inner diameter (Ditr) in the radial section of the inner tubular reinforcing plug surface (14) that is smaller than the diameter (Ds) of the predetermined support surface and larger than the inner diameter (Dite) of the elastic plug.
2. The buffer roller (1) according to claim 1, wherein, The tubular support element (5) includes at least one tubular end plate (53). And therein, the reinforcing plug (11) is placed near the end (53) of the tubular enclosure. Or one of them, The tubular support element (5) includes two opposite tubular endplates (53). And in which, each of the tubular endplates near the opposite endplate of the tubular endplate (53) is provided with the reinforcing plug (11). Or one of them, The tubular support element (5) includes two opposite tubular endplates (53) and a central tubular endplate region (54), the central tubular endplate region (54) being arranged to be equidistant from the two opposite tubular endplates (53); And in which, each of the tubular endplates near the opposite endplate of the tubular endplate (53) is provided with the reinforcing plug (11). And therein, at least one reinforcing plug (11) is provided in the central tubular enclosure area (54).
3. The buffer roller (1) according to claim 1 or 2, wherein, The elastic cover (7) includes a plurality of elastic plugs (9) arranged side by side; and wherein, Two opposite, side-by-side reinforcing plugs (11) are provided at the ends of the plurality of elastic plugs (9). Or one of them, The elastic cover (7) includes a plurality of adjacent elastic plugs (9) that are in contact with each other, that is, the elastic cover (7) includes a plurality of adjacent elastic plugs (9) that are constrained in pairs, and wherein Two opposing reinforcing plugs (11) are provided at the ends of the constrained plurality of elastic plugs (9) to keep the plurality of elastic plugs (9) constrained.
4. The buffer roller (1) according to any one of the preceding claims, wherein, The elastic cover (7) includes a plurality of first elastic plugs (9) arranged side by side; and wherein two opposite reinforcing plugs (11) are provided at the ends of the plurality of first elastic plugs (9). The elastic cover (7) includes a plurality of second elastic plugs (9) arranged side by side; and wherein a first end of the plurality of second elastic plugs (9) arranged side by side is positioned to contact a reinforcing plug (11) that is placed at the end of the plurality of first elastic plugs (9); and wherein an additional reinforcing plug (11) is placed at the opposite end of the plurality of second elastic plugs (9).
5. The buffer roller (1) according to any one of the preceding claims, wherein, The elastic plug (9) has an annular elastic plug body (15); Or one of them, The elastic plug (9) has an annular one-piece elastic plug body (15) made of elastic material. Or one of them, The elastic plug (9) has an annular elastic plug body (15), which does not have an annular insert made of different materials; Or one of them, The elastic plug (9) has an annular elastic plug body (15) without an annular insert made of different materials, such that when the elastic plug (9) is assembled onto the tubular support element (5), virtually all the material of the elastic plug body (15) is subjected to circumferential stress. Or one of them, The elastic plug (9) has an annular elastic plug body (15); In the cross-section of the annular extension of the annular elastic plug body (15), the annular elastic plug body (15) has: an elastic plug foot (16) that contacts the tubular support element (5); an elastic plug head (17) that forms an external impact surface (18) in the radial direction; and an elastic plug plunger (19) that is radially disposed between the elastic plug foot (16) and the elastic plug head (17). Or one of them, The elastic plug (9) has an annular elastic plug body (15); In the cross-section of the annular extension of the annular elastic plug body (15), the annular elastic plug body (15) has: an elastic plug foot (16) that contacts the tubular support element (5); an elastic plug head (17) that forms an external impact surface (18) in the radial direction; and an elastic plug plunger (19) that is radially disposed between the elastic plug foot (16) and the elastic plug head (17). And wherein the elastic plug (19) has an axial extension (AA) in the transverse direction of the radial extension (RR) of the elastic plug (19), and the axial extension (AA) of the elastic plug (19) is less than the axial extension of the elastic plug foot (16) and the elastic plug head (17). Or one of them, The elastic plug (9) has an annular elastic plug body (15); In the cross-section of the annular extension of the annular elastic plug body (15), the annular elastic plug body (15) has: an elastic plug foot (16) that contacts the tubular support element (5); an elastic plug head (17) that forms an external impact surface (18) in the radial direction; and an elastic plug plunger (19) that is radially disposed between the elastic plug foot (16) and the elastic plug head (17). And wherein the elastic plug foot (16) has an axial extension (AA) in the transverse direction relative to the radial extension (RR) of the elastic plug foot (16), and the axial extension (AA) of the elastic plug foot (16) is greater than the axial extension of the elastic plug head (17). Or one of them, The elastic cover (7) includes a plurality of first elastic plugs (9) placed side by side; Each elastic plug (9) has an annular elastic plug body (15); wherein, in the cross-section of the annular extension of the annular elastic plug body (15), the annular elastic plug body (15) has: an elastic plug foot (16) that contacts the tubular support element (5); an elastic plug head (17) that forms an external impact surface (18) in the radial direction; and an elastic plug plunger (19) that is radially disposed between the elastic plug foot (16) and the elastic plug head (17). And there is a gap between one elastic plug head (17) and the elastic plug head (17) adjacent to it. [Narrower columns allow for radial elastic deformation and axial clearance for axial elastic deformation].
6. The buffer roller (1) according to any one of the preceding claims, wherein, The reinforcing plug (11) has an annular reinforcing plug body (20); Or one of them, The reinforcing plug (11) has an annular one-piece reinforcing plug body (20), which is made of an elastic material except for the reinforcing ring (13) associated with the base (12) of the reinforcing plug; Or one of them, The reinforcing plug (11) has an annular one-piece reinforcing plug body (20), which, except for the reinforcing ring (13) attached to the base (12) of the reinforcing plug, is made of an elastic material; Or one of them, The reinforcing plug (11) has an annular one-piece elastic plug body (20), which is made of elastic material except for the reinforcing ring (13) which is made of metal material and associated with the base (12) of the reinforcing plug; Or one of them, The reinforcing plug (11) has an annular one-piece reinforcing plug body (20), which, except for the reinforcing ring (13) associated with the base (12) of the reinforcing plug, is made of an elastic material such that the foot (21) of the reinforcing plug is located between the reinforcing ring (13) and the surface (14) of the inner tubular reinforcing plug. Or one of them, The reinforcing plug (11) has an annular one-piece reinforcing plug body (20), which, except for the reinforcing ring (13) associated with the reinforcing plug base (12), is made of an elastic material such that the reinforcing plug foot (21) is located between the reinforcing ring (13) and the inner tubular reinforcing plug surface (14), so that when the reinforcing plug (11) is assembled onto the tubular support element (5), the material of the reinforcing plug foot (21) is subjected to approximately circumferential stress and is thus preloaded with tension, which is suitable to prevent the impact of the falling material (8) on the reinforcing plug (11) from causing the inner tubular reinforcing plug surface (14) on the opposite side of the impact to detach from the tubular element support surface (52) of the tubular support element; Or one of them, The reinforcing plug (11) has an annular reinforcing plug body (20); In the cross-section of the annular extension of the annular reinforcing plug body (20), the annular reinforcing plug body (20) has: a reinforcing plug foot (21), which is in contact with the tubular support element (5) as an inner part of the reinforcing plug base (12); a reinforcing plug head (22), which forms an outer impact surface (23) of the reinforcing plug in the radial direction; and a reinforcing plug post (24), which is radially disposed between the reinforcing plug base (12) and the reinforcing plug head (22). Or one of them, The reinforcing plug (11) has an annular reinforcing plug body (20); In the cross-section of the annular extension of the annular reinforcing plug body (20), the annular reinforcing plug body (20) has: a reinforcing plug foot (21), which is in contact with the tubular support element (5) as an inner part of the reinforcing plug base (12); a reinforcing plug head (22), which forms an outer impact surface (23) of the reinforcing plug in the radial direction; and a reinforcing plug post (24), which is radially disposed between the reinforcing plug base (12) and the reinforcing plug head (22). And wherein the reinforcing plug (24) has an axial extension (AA) in the transverse direction of the radial extension (RR) of the reinforcing plug (24), and the axial extension (AA) of the reinforcing plug (24) is less than the axial extension (AA) of the reinforcing plug base (12) and the reinforcing plug head (22). Or one of them, The reinforcing plug (11) has an annular reinforcing plug body (20); In the cross-section of the annular extension of the annular reinforcing plug body (20), the annular reinforcing plug body (20) has: a reinforcing plug foot (21), which is in contact with the tubular support element (5) as an inner part of the reinforcing plug base (12); a reinforcing plug head (22), which forms an outer impact surface (23) of the reinforcing plug in the radial direction; and a reinforcing plug post (24), which is radially disposed between the reinforcing plug base (12) and the reinforcing plug head (22). And wherein the reinforcing plug base (12) has an axial extension (AA) in the transverse direction of the radial extension (RR) of the reinforcing plug base (12), and the axial extension (AA) of the reinforcing plug base (12) is greater than the axial extension (AA) of the reinforcing plug head (22). [Narrower columns allow for radial elastic deformation and axial clearance for axial elastic deformation].
7. The buffer roller (1) according to any one of the preceding claims, wherein, When the inner tubular elastic plug surface (10) is fitted onto the tubular element support surface (52) of the tubular support element (5), the elastic plug (9) is connected to the tubular element support surface (52) by interference; for example, the interference is between 7 mm and 11 mm. as well as in, When the inner tubular reinforcing plug surface (14) is assembled onto the tubular element support surface (52) of the tubular support element (5), the reinforcing plug (11) is connected to the tubular element support surface (52) by interference; for example, the interference is between 2 mm and 5 mm.
8. The buffer roller (1) according to any one of the preceding claims, wherein, The reinforcing ring (13) is made of a material with a greater elongation resistance than the material of the reinforcing plug (11); Or one of them, The reinforcing ring (13) is made of steel; Or one of them, The reinforcing ring (13) is made of spring steel.
9. The buffer roller (1) according to any one of claims 6 to 8, wherein, The foot of the reinforcing plug (21) is made of an elastic material that allows the reinforcing plug (11) to deform, thereby changing the inner tubular reinforcing plug surface (14) of the reinforcing plug (11) from a diameter of Ditr to a diameter of Ds; Or one of them, The reinforced plug foot (21) includes an expansion opening (27), for example, the expansion opening (27) is an axial groove, which facilitates the elastic deformation of the reinforced plug foot (21).
10. The buffer roller (1) according to any one of the preceding claims, wherein, The buffer roller (1) includes a shaft (3) extending along a rotation axis (XX), the rotation axis (XX) defining the axial direction (AA); and wherein The shaft (3) is adapted to support the buffer roller (1) at the support structure (4); Or one of them, The buffer roller (1) includes a shaft (3) extending along a rotation axis (XX), the rotation axis (XX) defining the axial direction (AA); and wherein The buffer roller (1) includes at least one end support (6), which is connected to the tubular support element (5) and rotatably attached to the support structure (4); Or one of them, The buffer roller (1) includes a shaft (3) extending along a rotation axis (XX), the rotation axis (XX) defining the axial direction (AA); and wherein The buffer roller (1) includes at least one end support (6) which is connected to the tubular support element (5) and rotatably attached to the shaft (3), thereby allowing the tubular support element (5) to rotate about the shaft (3) supported by the support structure (4); Or one of them, The buffer roller (1) includes a shaft (3) extending along a rotation axis (XX), the rotation axis (XX) defining the axial direction (AA); and wherein The buffer roller (1) includes at least one end support (6) connected to the tubular support element (5) and rotatably attached to the support structure (4); and wherein A rolling bearing (25) is embedded between the shaft (3) and the end support (6). Or one of them, The buffer roller (1) includes a shaft (3) extending along a rotation axis (XX), the rotation axis (XX) defining the axial direction (AA); and wherein The buffer roller (1) includes at least one end support (6) connected to the tubular support element (5) and rotatably attached to the support structure (4); and wherein A rolling bearing (25) is embedded between the shaft (3) and the end support (6), and the rolling bearing (25) is separated from the environment outside the buffer roller (1) by a sealing device (26).
11. A material transport system (30) comprising at least one buffer roller (1) according to any one of the preceding claims.
12. The material transport system (30) according to claim 11, wherein, The material transport system (30) includes at least one conveyor belt (2) supported by at least one buffer roller (1).
13. A method for assembling a buffer roller (1), the method comprising the following steps: - Provide a tubular support element (5) that extends in an axial direction (AA) and is adapted to rotate about a rotation axis (XX); the tubular support element (5) includes an outer tubular element enclosure (57) that defines a tubular element support surface (52) having a predetermined support surface diameter (Ds). - Provide at least one elastic plug (9) that is capable of elastic deformation in at least a radial direction (RR) orthogonal to the axial direction (AA); the elastic plug (9) includes an inner tubular elastic plug surface (10). - Provide at least one reinforcing plug (11) made of an elastic material; wherein the reinforcing plug (11) includes a reinforcing plug base (12); the reinforcing plug base (12) includes at least one annular reinforcing ring (13) made of a material different from that of the reinforcing plug (11); and wherein the reinforcing plug (11) includes an inner tubular reinforcing plug surface (14). - An assembly tool (31) is provided, the assembly tool (31) comprising: a first tubular portion (32) having a first tool portion outer diameter (Deu); and a second ramp portion (33) having an outer surface that transitions from the first tool portion outer diameter (Deu) to the support surface diameter (Ds); - The assembly tool (31) is brought close to the tubular support element (5) by the larger diameter of the assembly tool (31) equal to the diameter (Ds) of the support surface. - At least one of the elastic plugs (9) is fitted onto the first tubular portion (32) with a clearance. - Push the elastic plug (9) along the second ramp portion (33) so that the surface (10) of the inner tubular elastic plug deforms to the diameter (Ds) of the support surface; - Slide the elastic plug (9) along the tubular support element (5) to the desired position; - Attach at least one of the reinforcing plugs (9) to the first tubular portion (32) with a clearance; - Push the reinforcing plug (11) along the second ramp portion (33) to deform the surface (14) of the inner tubular reinforcing plug to the diameter (Ds) of the supporting surface; - Slide the reinforcing plug (9) along the tubular support element (5) to the desired position.
14. The method for assembling the buffer roller (1) according to claim 13, further comprising the following additional steps: - The plurality of elastic plugs in the at least one elastic plug (9) are fitted onto the first tubular portion (32) with a clearance. - Push the plurality of elastic plugs in the at least one elastic plug (9) once or simultaneously along the second ramp portion (33) so that the inner tubular elastic plug surface (10) of each elastic plug (9) deforms to the diameter (Ds) of the support surface. - The plurality of elastic plugs in the at least one elastic plug (9) are slid along the tubular support element (5) to the desired position, either once or simultaneously; - The at least one reinforcing plug (11) is fitted onto the first tubular portion (32) with a clearance. - Push the reinforcing plug (11) along the second ramp portion (33) to deform the surface (14) of the inner tubular reinforcing plug to the diameter (Ds) of the supporting surface; - Slide the reinforcing plug (9) along the tubular support element (5) until it is positioned against the outermost of the plurality of elastic plugs among the at least one elastic plug (9).
15. The method for assembling the buffer roller (1) according to claim 13, further comprising the following additional steps: Before assembling the at least one elastic plug (9) and the at least one reinforcing plug (11), a spraying step is performed.