Drive assembly for a conveyor

Abstract

The present application relates to drive assemblies for conveyors. A drive assembly for a conveyor belt includes a pair of opposing end plates for mounting a conveyor drive and mounting assembly for mounting at least one of a stopper assembly, a scraper assembly, a combined stopper-scraper assembly, and a side shield. The scraper assembly and combined stopper-scraper assembly include a leaf spring selectively tensioned by a tensioning element on the end plate to deflect a scraper blade of the scraper assembly to an operating position.

Description

[0001] This application is a divisional application of the application filed on May 18, 2020, with application number 202080038520.5 and invention title "Drive assembly for a conveyor".

[0002] Related applications

[0003] This application claims priority to U.S. Provisional Patent Application Serial No. 62 / 850,171, filed May 20, 2019, entitled "Drive Assembly for a Conveyor," and U.S. Provisional Patent Application Serial No. 62 / 859,458, filed June 10, 2019, also entitled "Drive Assembly for a Conveyor." The contents of both applications are incorporated herein by reference. Technical Field

[0004] This invention relates to a power-driven conveyor. More specifically, this invention relates to a drive assembly for a conveyor for moving a conveyor belt via circuitry and transferring conveyed items off the conveyor. Background Technology

[0005] Powered conveyors are used to transport items. A feeding assembly transfers items onto the conveyor as the conveyor belt moves from the return path to a transport channel above it. A discharging assembly removes items from the conveyor as the conveyor belt moves from the transport channel to the return path. The drive moves the conveyor belt via a conveyor circuit. For example, a drive sprocket mounted on a rotatable shaft can mesh along the conveyor circuit and drive the conveyor belt. The drive sprocket can be located at the conveyor's discharge point or within the circuit's return path. Scrapers can be installed at the discharge point to remove debris from the conveyor belt before it enters the return path. Hygiene issues can arise with conveyors because dust, debris, bacteria, and other contaminants can get trapped in various components. Summary of the Invention

[0006] The conveyor drive assembly includes opposing end plates for mounting the conveyor drive and scraper assembly. The scraper assembly includes leaf springs for selectively deflecting the scraper to an operating position when the scraper assembly is mounted between the opposing end plates.

[0007] According to one aspect, a conveyor belt drive assembly includes a pair of opposing end plates; a drive mounted to and extending between the pair of opposing end plates; and a limiter-scraper assembly mounted to the pair of opposing side plates. The limiter-scraper assembly includes opposing component mounting arms for mounting the limiter and scraper assembly therebetween. Each component mounting arm includes a lower mounting portion including an opening for a limiter bearing, a front saddle for the scraper assembly, and rearward fingers terminating at an outward stop for locking the component mounting arm to an end plate.

[0008] According to another aspect, the drive assembly of the conveyor belt includes a pair of opposing end plates; a drive, the drive being mounted to and extending between the pair of opposing end plates; a first mounting assembly, the first mounting assembly being mounted to a first end plate; and a second mounting assembly, the second mounting assembly being mounted to a second end plate, each mounting assembly including a mounting portion for mounting at least one of a scraper assembly and a limiter assembly to the associated end plate.

[0009] According to another aspect, the drive assembly of the conveyor belt includes a pair of opposing end plates; a drive mounted to and laterally extending between the pair of opposing end plates; a scraper assembly mounted to and extending between saddles on each end plate; and a tensioning device comprising a leaf spring mounted to each end plate for selectively moving the scraper assembly between an operating position and a cleaning position.

[0010] According to another aspect, the scraper assembly of the conveyor belt includes a pair of opposing scraper mounting plates; a generally cylindrical base extending laterally between the pair of opposing scraper mounting plates for mounting scrapers; and a leaf spring mounted to a mounting portion connected to and extending longitudinally inward from each scraper mounting plate to selectively deflect the scraper to a scraping position relative to the conveyor belt.

[0011] This application provides the following:

[0012] 1) A drive assembly for a conveyor belt, comprising: a pair of opposing end plates; a drive mounted to and extending between the pair of opposing end plates; and a limiter-scraper assembly mounted to the pair of opposing end plates, the limiter-scraper assembly including opposing component mounting arms for mounting a limiter and a scraper assembly therebetween, each component mounting arm including a lower mounting portion including an opening for a limiter bearing, a front saddle for the scraper assembly, and a rearward finger terminating at an outward stop for locking the component mounting arm to an end plate.

[0013] 2) The drive assembly according to 1), wherein the assembly mounting arm comprises a shaped arm extending from the lower mounting portion including a lower bend and terminating at an upper latch.

[0014] 3) The drive assembly according to 2), wherein the lower bending portion includes a narrowing portion designed to specify a failure point.

[0015] 4) The drive assembly according to 2), wherein the forming arm includes a pin for rotating the mounting handle.

[0016] 5) The drive assembly according to 4) further includes a handle, the handle being mounted to the pin in the first position.

[0017] 6) The drive assembly according to 5), wherein the handle is mounted to a torsion bar extending between the end plates in the second position, the torsion bar including a latching arm for cooperating with the outward stop.

[0018] 7) The drive assembly according to 6), wherein the torsion bar includes a plurality of nozzles connected to a cleaning fluid source.

[0019] 8) The drive assembly according to 1), wherein one of the end plates includes a rotatable protrusion having a latch arm for engaging with the outward stop.

[0020] 9) The drive assembly according to 8), wherein the limiter-scraper assembly includes a leaf spring for deflecting the scraper into contact with the conveyor belt, the leaf spring selectively engaging the rotatable protrusion to apply tension to the leaf spring.

[0021] 10) The drive assembly according to 1) further includes a protective plate extending between and mounted on the opposing assembly mounting arms for protecting the clamp between the limiter and the conveyor belt.

[0022] 11) The drive assembly according to 10), wherein the protective plate includes a curved plate extending from a first side to a second side, an upper connecting piece on each side for fastening the protective plate to the inner surface of the assembly mounting arm, and a lower connecting piece on each side for fastening the protective plate to the lower edge of the assembly mounting arm.

[0023] 12) The drive assembly according to 1), wherein each end plate includes an upper connecting pin and a lower connecting pin for mounting the slide to the drive assembly.

[0024] 13) The drive assembly according to 12) further includes a slide rail mounted to the end plate, the slide rail including a planar sliding portion, a first connecting arm mounted to a first side of the planar sliding portion on the first end plate, and a second connecting arm mounted to a second side of the planar sliding portion on the second end plate.

[0025] 14) The drive assembly according to 13), wherein each connecting arm includes an upper connecting portion having two bases, each base for receiving a connecting pin on the end plate.

[0026] 15) The drive assembly according to 13), wherein each connecting arm further includes a lower portion forming a piece that engages with a stop on the assembly mounting arm.

[0027] 16) A drive assembly for a conveyor belt, comprising: a pair of opposing end plates; a drive mounted to and extending between the pair of opposing end plates; a first mounting assembly mounted to a first end plate; and a second mounting assembly mounted to a second end plate, each mounting assembly including a connector for connecting the mounting assembly to an associated end plate and a mounting portion for mounting at least one of a scraper assembly and a limiter assembly to the associated end plate.

[0028] 17) The drive assembly according to 16), wherein the first and second mounting assemblies are mounted to the end plate using sealing bolts with sealing washers.

[0029] 18) The drive assembly according to 16), wherein each mounting assembly includes a bearing opening for receiving a bearing of a limiter and a front saddle for receiving a base of a scraper assembly.

[0030] 19). The drive assembly according to 18) further includes a limiter-scraper assembly, the limiter-scraper assembly being mounted to and extending between the mounting assemblies, the limiter-scraper assembly including a roller limiter having an end bearing mounted in the bearing opening and a scraper base mounted to receive a scraper in the front saddle.

[0031] 20) The drive assembly according to 16), wherein the mounting assembly is mounted to the bottom edge of the end plate.

[0032] 21) The drive assembly according to 16), wherein the mounting assembly is mounted to the outer surface of the end plate.

[0033] 22) The drive assembly according to 16), wherein the mounting assembly includes a limiter mounting rod for mounting a detachable limiter.

[0034] 23) A drive assembly for a conveyor belt, comprising: a pair of opposing end plates; a drive mounted to and laterally extending between the pair of opposing end plates; a scraper assembly mounted to and extending between saddles connected to each end plate; and a tensioning device comprising a leaf spring mounted to each end plate for selectively moving the scraper assembly between an operating position and a cleaning position.

[0035] 24) The drive assembly according to 23), wherein the tensioning device includes an air-driven tensioning device mounted to the end plate.

[0036] 25) The drive assembly according to 23), wherein the scraper assembly includes a pair of opposing scraper mounting plates, a scraper base for mounting scraper tips extending laterally between each scraper mounting plate, and a leaf spring extending longitudinally inward from each scraper mounting plate.

[0037] 26) The drive assembly according to 25), wherein the tensioning device further includes a column, rod and arm for selectively pushing one end of the leaf spring downward to deflect the scraper assembly to the operating position.

[0038] 27) A scraper assembly for a conveyor belt, comprising: a pair of opposing scraper mounting plates; a generally cylindrical base extending laterally between the pair of opposing scraper mounting plates for mounting scrapers; and a leaf spring mounted to a mounting portion connected to and extending longitudinally inward from each scraper mounting plate to selectively deflect the scraper to a scraping position relative to the conveyor belt.

[0039] 28) The scraper assembly according to 27), wherein the mounting portion includes a shaped protrusion extending upward from a channel that extends longitudinally outward in an associated scraper mounting plate.

[0040] 29) The scraper assembly according to 27), wherein the generally cylindrical base includes a reduced-diameter neck for receiving in a scraper assembly seat between two end plates of a conveyor.

[0041] 30) The scraper assembly according to 27), wherein each mounting plate further includes a cylindrical pin that extends laterally from one end of the mounting plate and forms the pivot point of the leaf spring.

[0042] 31) The scraper assembly according to 27) further includes a sealing bolt, the sealing bolt including a sealing washer for mounting the first end of the leaf spring to the mounting portion.

[0043] 32) The scraper assembly according to 31), wherein the mounting portion further includes a shaped fulcrum spaced apart from the sealing bolt forming the fulcrum of the leaf spring.

[0044] 33) The scraper assembly according to 32), wherein the forming fulcrum forms a seat for constraining the lateral movement of the leaf spring. Attached Figure Description

[0045] Figure 1 This is an isometric view of a drive assembly of a conveyor according to an embodiment of the present invention;

[0046] Figure 2 yes Figure 1Side view of the end plate of the drive component;

[0047] Figure 3 yes Figure 1 An isometric view of the scraper assembly of the drive component;

[0048] Figure 4A yes Figure 3 A side view of the scraper assembly in a tensioned state.

[0049] Figure 4B yes Figure 3 An isometric view of one side of the scraper assembly in a tensioned state;

[0050] Figure 5A yes Figure 3 Side view of the exterior of the scraper assembly in a relaxed state;

[0051] Figure 5B yes Figure 3 An isometric view of one side of the scraper assembly in a relaxed state;

[0052] Figure 6 yes Figure 3 Exploded view of the exterior of the scraper assembly;

[0053] Figure 7 yes Figure 3 A top view of the scraper base of the scraper assembly;

[0054] Figure 8 yes Figure 7 Detailed isometric view of the base of the scraper;

[0055] Figure 9A yes Figure 4A A cross-sectional view of the exterior of the scraper assembly during scraper insertion;

[0056] Figure 9B When the scraper is inserted into the base of the scraper. Figure 4A A cross-sectional view of the exterior of the scraper assembly;

[0057] Figure 10 yes Figure 1 An isometric view of the drive assembly in the operating position, with the scraper assembly's leaf spring in a tensioned state;

[0058] Figure 11 yes Figure 1 An isometric view of the drive components, with the scraper assembly in a relaxed state;

[0059] Figure 12 yes Figure 1 Isometric view of the drive components during side guard removal;

[0060] Figure 13 yes Figure 12 An isometric view of the drive assembly with the side guard removed;

[0061] Figure 14 This is a detailed view of the locking portion of the side guard plate according to an embodiment of the present invention;

[0062] Figure 15 yes Figure 14 A cross-sectional view of the locking part;

[0063] Figure 16 This is a detailed front view of a side guard plate in a drive assembly according to an embodiment of the present invention;

[0064] Figure 17 This is an isometric view of the drive assembly prior to the insertion of the scraper assembly, according to another embodiment;

[0065] Figure 18 yes Figure 17 An isometric view of the drive component during scraper component insertion;

[0066] Figure 19 yes Figure 17 An isometric view of the driving component in operation;

[0067] Figure 20 yes Figure 19 An isometric view of the drive assembly with side guards mounted on it;

[0068] Figure 21 This is an isometric view of the drive assembly prior to the insertion of the scraper assembly, according to another embodiment;

[0069] Figure 22 yes Figure 21 An isometric view of the fully assembled and tensioned drive components;

[0070] Figure 23 yes Figure 22 A partial rear view of one side of the drive component;

[0071] Figure 24 This is an isometric view of a drive component according to another embodiment;

[0072] Figure 25 yes Figure 24 A cross-sectional side view of the drive assembly including the chute for receiving the discharged product;

[0073] Figure 26 yes Figure 25 Isometric view of the limiter-scraper assembly;

[0074] Figure 27 yes Figure 26 Isometric view of the limiter-scraper assembly without scraper;

[0075] Figure 28 yes Figure 27 Isometric view of the roller limiter;

[0076] Figure 29 yes Figure 26 Front cross-sectional view of the limiter-scraper assembly;

[0077] Figure 30 yes Figure 26 Isometric view of the mounting arm of the limiter-scraper assembly;

[0078] Figure 31 yes Figure 24 The side view of the driving component in the operating position;

[0079] Figure 32 This is an isometric view of a drive assembly with a molded operating handle according to one embodiment;

[0080] Figure 33 yes Figure 32 An isometric view of the drive components at the cleaning location;

[0081] Figure 34 This is an isometric view of a molding handle with an integrated spray bar in a drive assembly according to one embodiment.

[0082] Figure 35 It is an isometric view of the drive assembly, including the guard plate to protect the grip between the roller limiter and the conveyor belt.

[0083] Figure 36 It shows the protective plate. Figure 35 Detailed cross-sectional view of the driving component;

[0084] Figure 37 yes Figure 35 Isometric view of the protective plate of the drive component;

[0085] Figure 38 This is an isometric view of a groove suitable for integration into a drive assembly according to one embodiment;

[0086] Figure 39 Is adopted Figure 38 An isometric view of the drive component of the chute;

[0087] Figure 40 It shows that Figure 38 Isometric view of the slide rail mounted to the end plate of the drive assembly;

[0088] Figure 41 According to one embodiment, there is an engaging component mounting arm. Figure 38 Detailed view of the lower mounting section of the slide;

[0089] Figure 42 It is an isometric view of the drive assembly including the chute above the scraper;

[0090] Figure 43 Show Figure 42 The drive assembly includes a limiter-scraper assembly with a cover plate;

[0091] Figure 44 This is an isometric view of a drive assembly according to one embodiment, the drive assembly including a pillow block bearing housing for receiving a bearing of a roller limiter and including an integral scraper saddle.

[0092] Figure 45 yes Figure 44 Detailed view of the bearing housing;

[0093] Figure 46 yes Figure 45 An isometric view of the first side of the bearing housing;

[0094] Figure 47 yes Figure 46 An isometric view of the second side of the bearing housing;

[0095] Figure 48 yes Figure 44 A side view of the bearing housing in the drive assembly;

[0096] Figure 49 It is an isometric view of the drive assembly including the limiter mounting plate mounted on the outside of the end plate;

[0097] Figure 50 yes Figure 49 An isometric view of the inner side of the limiter mounting plate of the drive component;

[0098] Figure 51 yes Figure 50 Isometric view of the outer side of the limiter mounting plate;

[0099] Figure 52 yes Figure 49 A side view of the driving component;

[0100] Figure 53 This is an isometric view of the driving component of another embodiment;

[0101] Figure 54 yes Figure 53 A side view of the driving component;

[0102] Figure 55 yes Figure 53 An isometric view of the scraper assembly of the drive component;

[0103] Figure 56 yes Figure 53The isometric view of the scraper assembly's drive component has been removed;

[0104] Figure 57 yes Figure 53 An isometric top view of the side of the drive component;

[0105] Figure 58 yes Figure 53 A cross-sectional side view of the driving component;

[0106] Figure 59 yes Figure 53 Isometric exterior view of the bearing housing;

[0107] Figure 60 yes Figure 59 An isometric internal view of the bearing housing;

[0108] Figure 61 This is an isometric view of a drive assembly for a segmented conveyor belt according to another embodiment;

[0109] Figure 62 yes Figure 61 The front view of the driving component;

[0110] Figure 63 yes Figure 61 An isometric view of the drive assembly of the limiter mounting plate has been removed;

[0111] Figure 64 yes Figure 61 An isometric view of the outer side of the limiter mounting plate of the drive assembly;

[0112] Figure 65 yes Figure 64 Isometric view of the inner side of the limiter mounting plate;

[0113] Figure 66 yes Figure 61 An isometric view of the limiter component of the drive component;

[0114] Figure 67 This is an isometric view of a scraper assembly including a leaf spring, according to another embodiment of a drive assembly;

[0115] Figure 68 yes Figure 67 Detailed view of one side of the scraper assembly;

[0116] Figure 69 yes Figure 67 Detailed view of the mounting section of the leaf spring of the scraper assembly;

[0117] Figure 70 yes Figure 67 A cross-sectional side view of the scraper assembly;

[0118] Figure 71 This is an isometric view of one side of a scraper assembly including a leaf spring according to another embodiment;

[0119] Figure 72 yes Figure 71 Side view of the scraper assembly;

[0120] Figure 73 This is a bottom isometric view of one side of a scraper assembly including a leaf spring according to another embodiment;

[0121] Figure 74 yes Figure 73 Isometric side view of the scraper assembly;

[0122] Figure 75 It is an equidistant side of a scraper assembly including a leaf spring according to another embodiment;

[0123] Figure 76 This is an isometric view of a drive component according to another embodiment;

[0124] Figure 77 yes Figure 76 The side view of the driving component in the operating position;

[0125] Figure 78 yes Figure 76 The drive component is shown in a side view at the cleaning location. Detailed Implementation

[0126] This invention provides a sanitation system located at the drive end of a conveyor, which is easy to install, move to a cleaning location, and / or remove from that location. The invention will now be described with respect to exemplary embodiments. Those skilled in the art will understand that the invention can be implemented in many different applications and embodiments, and is not specifically limited to its application to the particular embodiments described herein.

[0127] Figure 1 This is an isometric view of the drive assembly 10 of the conveyor that forms the discharge of the conveyor. The drive assembly 10 includes a pair of opposing end plates 20 for mounting drive shafts 42 of reversing elements (such as sprockets or other conveyor drives) to a conveyor belt 40 at the discharge end of the transport channel, the conveyor belt extending between the opposing end plates 20. An exemplary conveyor belt 40 is a positive-drive, low-tension conveyor belt. Examples of suitable positive-drive, low-tension conveyor belts include, but are not limited to, those from Intralox Corporation, located in Harahan, Los Angeles, USA. Conveyor belts, Habasit's Cleandrive conveyor belts, Gates Mectrol's Gates Mectrol conveyor belts Conveyor belts, Volta SuperDrive from Volta Conveyor Belt Company TMConveyor belts and other positively driven conveyor belts, as well as other positively driven, low-tension conveyor belts known in the art. An exemplary conveyor belt 40 has a smooth outer surface with substantially no discontinuities and an inner surface with teeth or other suitable drive elements of a given belt pitch. The conveyor belt 40 transports products from an inlet to an outlet along a conveyor belt and returns along a return path below the conveyor belt. The conveyor belt 40 may comprise several segments or other features and is not limited to the exemplary example. End plates 20 are also fitted with scraper assemblies 60 for cleaning the conveyor belt 40. Side guards 80 are fitted to the end plates 20 to protect the edges of the conveyor belt 40 in the outlet area and / or to contain products on the conveyor belt conveyor belt's conveyor belt conveyor belt. The exemplary side guard 80 also covers reversing elements.

[0128] refer to Figure 2 Each end plate 20 has a body extending height from a top edge 21 to a bottom edge 22 and length from a front edge 23 to a rear edge 13, the rear edge fitting into a rear mounting plate 12. A shaft opening (shown as a tapered, angled channel 24) extends from a wide opening between the top edge 21 and the front edge 23 and terminates in a seat 25 for a shaft 42 of a motorized sprocket or other reversing element. Alternatively, a bearing assembly may be mounted or integral with the seat 25 to accommodate the shaft of a sprocket or other reversing element driven by an external motor. A scraper assembly seat 26 extends from the bottom of the front edge 23. An exemplary scraper assembly seat 26 is an open seat including curved protrusions, but the invention is not limited thereto. Behind the scraper assembly seat 26, a limiting groove 27 is formed at the bottom edge 22 to limit rotation of the scraper assembly away from the belt, as described in detail below. A tensioning bar 28 or other features are used for selectively tensioning and releasing the tensioning device in the scraper assembly, as described below. An exemplary tensioning bar 28 includes a rounded contact block 120 at the end of a connecting leg 121, which is pivotally connected to a handle 122 via a pivot 123. Each end plate 20 also includes a shaped recess 29 between a top edge 21 and a rear edge 13 for receiving a corresponding shaped pivot mount of a side guard plate 80, as described below.

[0129] refer to Figure 3The scraper assembly 60 includes a generally cylindrical base 61 extending between a pair of opposing scraper mounting plates 62. A scraper 63 extends upward from the base 61. The base includes a reduced-diameter neck 66 for receiving the scraper assembly in a scraper assembly seat 26 between the two end plates 20. Each scraper mounting plate 62 includes a semi-circular front wall 67 transitioning to a generally flat bottom wall 68 and a downward-angled upper wall 69. A channel 72 extends inward between the flat bottom wall 68 and the downward-angled upper wall 69 for mounting a leaf spring 90 or other tensioning element of the scraper assembly 60 and forming a pair of legs: an upper leg 71 and a lower leg 73. The upper leg 71 terminates in a downwardly extending block 74 for guiding the leaf spring 90. A cylindrical pin 75 extends laterally at the end of the lower leg 73 for interacting with a groove 27 of the end plate 20 to limit movement of the scraper assembly 60 and for forming a pivot point (fulcrum) for the leaf spring 90. The scraper assembly 60 also includes a shaped protrusion 76 located at the outer end of the lower leg 73 within the channel 72 for mounting the leaf spring 90 through the opening 92 in the outer end of the leaf spring 90. The top of the shaped protrusion 76 is larger than the opening to constrain the leaf spring 90, and then the body of the shaped protrusion 76 gradually narrows towards the lower leg 73 to allow the outer end of the leaf spring to slide over the shaped protrusion. The exemplary leaf spring 90 deforms to mount the leaf spring 90 over the shaped protrusion 76, and tools may be required to mount the leaf spring onto and / or remove it from the scraper mounting plate 62. When mounted to the scraper mounting plate 62, the elongated leaf spring 90 extends inward away from the scraper 63. Therefore, the leaf spring is easy to replace, repair, and adjust, and provides a reliable, consistent, and cleanable tensioning mechanism to ensure proper contact between the scraper and the conveyor belt.

[0130] refer to Figure 4A and Figure 4B In the tensioned position, the leaf spring 90 applies torque to the scraper assembly 60. In the tensioned position, pushing the inner end 91 of the leaf spring downward causes the leaf spring 90 to pivot downward about the pin 75, pushing the outer end receiving the opening 92 upward and pulling the scraper mounting plate 62 upward. The shaped protrusion 76 and the downwardly extending block 74 constrain the upward movement of the outer end of the leaf spring.

[0131] like Figure 5A and Figure 5B As shown, in the untensioned position, for example, when the scraper assembly 60 is removed, the outer end of the leaf spring 90 can be located at the bottom of the shaped protrusion 76 extending through the opening 92, the body of the leaf spring 90 is spaced apart from the downwardly extending block 74, and the interior of the body rests against the pin 75. When no pressure is applied to the leaf spring, it is relaxed and can be removed from each contact point with only a small force, making it easy to clean.

[0132] Figures 6 to 9BThe scraper assembly 60 is shown with a scraper blade 63 and a scraper base 61. The scraper blade 63 can be easily and detachably attached to the scraper base 61 without tools. The scraper blade 63 includes a tapered body 64 terminating at a tip 65, which, in the operating position, is biased towards the conveyor belt 40 to remove debris from the conveyor belt surface. The exemplary scraper blade 63 also provides continuous force on the conveyor belt to ensure proper engagement between the drive elements on the conveyor belt and the drive. Figure 9A and Figure 9B As shown, the exemplary scraper body 64 has a triangular shape. In another embodiment, the scraper body 64 has different shapes, such as a tapered lower portion and a tapered upper portion extending at an angle relative to the tapered lower portion. The scraper body 63 may have a uniform width or may gradually narrow towards the edge 65 in both width and thickness. The scraper 63 also includes a mounting piece 161 extending downward from the bottom of the tapered scraper body 64. The corresponding scraper base 61 includes a series of openings, shown as channels 162, for receiving the mounting piece 161 to mount the scraper 63 to the scraper base. The exemplary opening 162 includes a central bend or curve 163, such as... Figure 7 and Figure 8 As shown, this facilitates clamping of the mounting piece 161 when it is inserted into the base opening 162. A central bend or curve 163 ensures three-point pressurized contact between the mounting piece 161 and the channel 162, while the channel 162 is sized to ensure sufficient clearance to accommodate the wide tolerance range of the scraper 63. Each exemplary channel 162 is wider than the thickest mounting piece 161, but the difference between the straight edge and the bent end of the channel 162 is smaller than that of the thinnest tolerance scraper mounting piece 162. Alternatively, a single serpentine channel spanning the length of the base 61 can be used, or other channel configurations can be used.

[0133] like Figure 9A and Figure 9B As shown, each mounting piece 161 includes a rounded recess 164 between the scraper body 64 and the mounting piece 161 to facilitate cleaning, although the rounded recess 164 may have other shapes, sizes, and configurations or may be omitted entirely. When inserted into the base 61, the bottom of the scraper body 64 rests against the top of the base 61, as... Figure 9B As shown.

[0134] refer to Figure 10 In the operating position, the positioning tensioning rod 28 contacts the contact block 120 with the inward end 91 of the leaf spring 90 and pushes it downward to tension the leaf spring 90. The downward force on the inward end 91 of the leaf spring 90 causes the outer end of the leaf spring 90 to rotate upward against the protrusion 76, causing the scraper mounting plate 62 to rotate upward, so that the scraper tip 65 presses against the conveyor belt 40. Therefore, the tensioned leaf spring 90 keeps the scraper tip 65 pressed against the conveyor belt 40.

[0135] Figure 11The drive unit 10 is shown during the release of tension bar 28 to remove tension in leaf spring 90. Tension bar 28 is rotatable clockwise about pivot 123, causing contact block 120 to move upward and outward, thereby releasing tension in leaf spring 90 and allowing scraper tip 65 to pivot away from conveyor belt 40. In an exemplary embodiment, the rotation of the scraper assembly away from the conveyor belt is limited by interference between pin 75 and slot 27 in end plate 20, such as... Figure 2 As shown. The allowable amount of movement can be adjusted by modifying the size, position, or configuration of the interfering component.

[0136] In another embodiment, the tension bar 28 can also be used to disengage the scraper assembly from the conveyor belt. For example, the scraper mounting plate 62 may include protrusions or other features designed to engage the tension bar 120, which is designed to contact the scraper mounting plate 62 when rotated to release tension and rotate the scraper mounting plate 62 within the saddle 26.

[0137] refer to Figures 12 to 16 An exemplary drive assembly 10 includes side guards 80 that can be easily integrated into and removed for cleaning or other purposes. Each exemplary side guard 80 includes a molded block of ultra-high molecular weight polyethylene (UHMW) or additional low-friction material forming a main track 81 near the front of the sprocket 14, a molded mounting portion 82 at the inner end of the main track 81, and a front track 83 that bends downward and forward from the front end of the main track 81 and terminates at a locking portion 84. The molded mounting portion 82 is configured to receive in and pivot about a molded recess 29 in the end plate 20 to mount the side guard to the drive assembly 10. When the drive assembly 10 is assembled, the front track 83 covers the front wall 23 of the corresponding end plate 20, as shown in the image. Figure 1 As shown. A tapered inward protrusion 84 extends radially inward from the interface between the main track 81 and the front track 83, conforming to the tapered channel 24 of the end plate 20 and terminating at a block 86 (adapting to the shaft 42 above the base 25), thereby covering the exposed portion of the sprocket 14. Depending on the specific configuration of the end plate 20, the side guard 80 can have any suitable size, shape, and configuration. In another embodiment, a separate pivot point for pivotally mounting the side guard 80 to the end plate 20 can be used, for example, a pin extending from the end plate received in an opening in the side guard.

[0138] refer to Figure 14 and Figure 15An exemplary locking portion 84 includes an opening 87 for receiving a lock 180, shown as an embedded bolt, having a head 181, a shank 182, and an end thread 183 received in an opening in wall 23. The thread 183 is wider than the shank 182, and the size of the opening 87 can vary to accommodate different widths and capture the bolt in the locking portion 84. After the molded mounting portion 82 is inserted into the molded recess 29, the track 81 rotates about a pivot point formed by the molded mounting portion 82 such that the track 81 covers the top edge 21 of the end plate, the tapered inward protrusion 84 is inserted into the tapered channel 24, the front track 83 covers the front wall 23, and the opening 87 is aligned with the locking opening in the front wall. The bolt is then turned to insert the thread 183 of the bolt 180 into the capturing opening. In one embodiment, securing the side guard 80 in place also blocks the scraper assembly 60 and prevents it from disengaging from the seat 26. The shank 182 may also include a thread that tightly engages with the thread in the opening 87.

[0139] Figure 16 This is a cross-sectional view of the interface between the main track 81 and the end plate 20 of the side guard plate 80. The exemplary main track 81 includes a channel 184 that receives a flange 186 on the inner side of the top edge 21 of the end plate 20 to constrain lateral movement of the side guard plate 80. The exemplary main track 81 has a generally rectangular cross-section, and its inner end covers the edge of the conveyor belt. The channel 184 is formed in the bottom surface of the track body, and a lower protrusion 187 extends along the inner wall of the end plate 20 (located between the edge of the end plate and the edge of the conveyor belt 40).

[0140] Figures 17 to 20 A drive assembly 210 of a conveyor according to another embodiment is shown. Although the scraper assembly 60 and... Figures 1 to 16 The scraper assembly 60 is the same, but the way the leaf spring 90 is tensioned differs. The exemplary drive assembly 210 includes a tension post 228 extending from an end plate 220 near the junction of the bottom and rear edges. When the scraper assembly 60 is located in the scraper assembly seat 226, in Figure 19 In the middle, leaf spring 90 is tensioned by tensioning post 228, requiring no additional steps. For example... Figure 20 As shown, after the scraper assembly is installed, the side guard 80 can be mounted to the drive assembly 210. The installed side guard 80 prevents the scraper assembly 60 from being removed from the seat 226.

[0141] In another embodiment, such as Figures 21 to 23 As shown, the tensioning device for the leaf spring 90 in the scraper assembly 60 of the drive assembly 310 may include a gripper 328. When the scraper assembly 60 is inserted into the scraper assembly seat 326, the gripper extends upward and outward from the tensioning post 329 at an angle to guide the end of the leaf spring 90 into the tensioned position, as shown. Figure 22 As shown.

[0142] Figures 24 to 25 Another embodiment of the conveyor drive assembly 410 is shown, including a limiter for ensuring proper engagement between the drive element on the conveyor belt 440 and the conveyor drive (such as sprocket 414). An exemplary limiter is a roller limiter 470, but alternatively, it could be a full-width non-roller limiter, a series of separate limiters, or any other suitable type of limiter. The drive assembly 410 includes a pair of opposing end plates 420 connected by a transverse mounting plate 412 for mounting or integrating a bearing 408 for a drive shaft 442 that rotatably accommodates a reversing element (such as sprocket 414) of the conveyor belt 440 (located at the discharge end of the conveyor runner), which extends between the opposing end plates 420. The end plates 420 also mount a limiter-scraper assembly 460 for mounting both the roller limiter 470 and a scraper assembly (for cleaning the conveyor belt 440). Figure 24 The image shows the removal of the scraper drive assembly 410, and... Figure 25 A scraper 463 is shown installed in the limiter-scraper assembly 460. A side guard plate 480 is mounted to the end plate 420 to protect the edge of the conveyor belt 440 in the discharge area and / or to accommodate products on the conveyor belt conveyor track.

[0143] The drive component 410 may also include a slide 402, such as Figure 25 As shown, a chute is mounted to end plate 420 to receive products discharged from conveyor belt 440.

[0144] Figure 26 Show Figure 24 and Figure 25 The limiter-scraper assembly 460 includes a scraper 463 mounted to a base 461, extending between scraper mounting plates 459 mounted to assembly mounting arms 462. Assembly mounting arms 462 are mounted to the outside of end plates 420 to mount the scraper assembly and limiter to the drive assembly 410. Scraper mounting plates 459 are similar to the scraper mounting plate 62 described above, each equipped with a leaf spring 490 to deflect the scraper 463 to engage with the conveyor belt. Roller limiters 470 extend between the assembly mounting arms 462, and include openings 471 for receiving bearings 472, such as... Figure 27 As shown, this allows the roller limiter 470 to rotate relative to the component mounting arm 462. Figure 28 and Figure 29 As shown, the roller limiter 470 may include a tapered end 488.

[0145] Figure 30This is a detailed view of a component mounting arm 462 according to an embodiment of the present invention. The component mounting arm 462 can accurately hold the roller limiter and / or scraper relative to the conveyor drive in an operating and cleaning position, allowing movement between these two positions and tool-free removal from the conveyor frame. An exemplary component mounting plate 462 includes a lower mounting portion 473, which includes an opening 471 for receiving a bearing 472. Extending rearward from the lower mounting portion 473 are one or more fingers 474, the upper fingers 474 terminating at an outward stop 475, shown as an approximately square protrusion extending outwardly from a recessed connection portion 476. The lower mounting portion 473 also includes a saddle 477 at its front end for mounting a scraper assembly 460. The exemplary saddle 477 includes aggregate legs 478, 479 that form a molded opening 487 for receiving a base 461 of the scraper. The forming opening 487 includes an upper cylindrical portion intersecting the lower cylindrical portion to allow the scraper base 461 to move within the opening 487 while preventing the base 461 from detaching without deliberate action. For example, in the cleaning position, when the assembly mounting arm 462 is flipped, as described below, the scraper base 461 can fall from the first leg 478 to the second leg 479 to allow cleaning of the first leg 478, wherein the scraper base 461 is normally held.

[0146] The forming arm extends upward from the lower mounting portion 473, includes a lower bend 481, and terminates at an upper latch 482. The lower bend 481 includes a narrowing portion 483 that may include a hole (designed to specify a failure point) to allow the component mounting arm 462 to break, bend, or otherwise deform before other components in the assembly when excessive force is applied, thereby preventing catastrophic failure. A forming head 484 projects forward from the top of the narrowing portion 483, and a pivot arm 429 extends laterally outward between the forming head and the narrowing portion 483. The upper latch 482 forms a keyhole opening 485 having a narrowed opening formed by a generally flat sidewall 486.

[0147] Return to reference Figure 24 and Figure 31 End plate 420 includes mounting features for mounting the limiter-scraper assembly 460. An exemplary end plate 420 includes an upper mounting protrusion 423 for receiving an upper latch 482 and a lower protrusion 424 forming a stop. The upper mounting protrusion includes a flat slider and rounded top and bottom corners and is designed to be received in the upper latch 482 such that the mounting arm 462 can rotate about the upper protrusion without being removed from the assembly. Figure 24 and Figure 31As shown, when in the operating position, the stop 475 of the limiter-scraper assembly 460 abuts against the lower protrusion 424 of the end plate 420 to position the roller limiter and scraper appropriately relative to the conveyor belt 440. The lower protrusion 424 of the end plate 420 may include a latching arm 427 designed to receive and lock onto the stop 475, fitting precisely into the space formed between the stop 475 and the connecting portion 476. In one embodiment, the lower protrusion 424 is rotatable to move the latching arm 427 to engage and disengage with the stop 475. A leaf spring 490 also abuts against the lower protrusion 424 and rests against the stop 475. The end of the leaf spring 490 bends downward to engage with the lower protrusion 424, deflecting the scraper to engage with the conveyor belt. Alternatively, the leaf spring 490 may extend below the protrusion 424 to deflect the leaf spring. The limiter-scraper assembly 460 can rotate around the mounting protrusion 423 to place the assembly in a cleaning position, wherein the scraper and roller limiter are removed from the conveyor belt.

[0148] In another embodiment, such as Figure 32 and Figure 33 As shown, the drive assembly 410 may include a molded handle 528, which is pivotally connected to the assembly mounting arm 462 at a pivot point 429 near the head 484. The molded handle 528 is also pivotally connected to a lower protrusion 524 of the end plate 420. In the operating position, as... Figure 32 As shown, pushing the handle 528 downward applies pressure to the leaf spring 490 to deflect the scraper into position. The handle 528 also rotates the lower protrusion 524 into position, locking the connected latch arm 527 onto the stop 475. The molded handle 528 may include a spring plate 530 for connecting the molded handle to the component mounting arm pivot point 429, shown as a pin extending from the component mounting arm 462. The spring plate 530 prevents the handle 528 from moving out of the operating position without requiring any special action.

[0149] Handle 528 can be pulled back and rotated around the lower protrusion 524, as... Figure 33 As shown, releasing the stop 475 from the latch arm 527 allows the limiter-scraper assembly 460 to pivot upward about the upper protrusion 423, disengaging it from the operating position and moving it to the cleaning position, and also relaxes the leaf spring 490. A handle 528 can be used to disengage the scraper and conveyor belt without fully moving the arm assembly to the cleaning position. An exemplary handle connects to the two assembly mounting arms 462 via a torsion bar extending between the end plates 420, allowing the assembly to move between the operating and locked positions from one side of the conveyor. The torsion bar, terminating at a protrusion 524 extending from each end plate 420, slides in a saddle formed in the end plate and can be inserted through a slot. Bolts or other fasteners can lock the torsion bar into place.

[0150] refer to Figure 34In one embodiment, the handle 528 may be attached to or integrated with the spray bar 540 for cleaning the conveyor belt. The spray bar 540 may extend between the mounting plates 520 to form the aforementioned torsion bar and includes a nozzle 542 connected to a cleaning fluid source for spraying cleaning fluid onto the conveyor belt within the drive assembly 410.

[0151] refer to Figures 35 to 37 In one embodiment, the drive assembly 410 may include a guard plate 580 to protect the pinch between the roller limiter 470 and the conveyor belt 440, thereby providing stability to the system while protecting the roller limiter 470. An exemplary guard plate 580 may extend between and be mounted to opposing component mounting arms 462. An exemplary guard plate includes a bent plate 581 extending from a first side to a second side. On each side, an upper connecting tab 582 includes an opening for receiving a fastener 584 to secure the guard plate to the inner surface of the component mounting arm 462. Each side of the guard plate 580 also includes a bent lower connecting tab 586, which includes an opening for receiving another fastener 588 to secure the guard plate 580 to the lower edge of the component mounting arm 462.

[0152] As previously described, drive assembly 410 may include a chute 402 for receiving products unloaded at the drive end of a conveyor employing drive assembly 410. (See reference...) Figures 38 to 41 The exemplary chute 402 includes a planar sliding portion 610 with sidewalls 611 and a connecting arm 620 for fitting the chute to an end plate 420. When fitted, the planar sliding portion 610 of the chute extends from the end plate 420 and rests below the scraper mounting rod 461, allowing the limiter-scraper assembly to rotate to a cleaning position while the chute remains fitted to the end plate 420. Each connecting arm 610 includes an upper connecting portion 611 with two bases 612, 613, each base for receiving connecting pins 428, 429 on the end plate 420. Figure 41 As shown, the chute connecting arm 620 further includes a lower portion 614 that includes a body connected to the chute connecting arm 620 and terminates in a planar portion 615 of an upwardly extending piece 616. The exemplary piece 616 forms a contact point with the limiter-scraper connecting arm 462. When the limiter-scraper assembly 460 is in the operating position, the limiter-scraper connecting arm 462 tensions the chute and locks it in place to reduce vibration. The chute 402 can engage with the limiter-scraper assembly in any suitable manner. The piece 616 can alternatively extend laterally from a portion of the chute 402 to contact an associated portion of the limiter-scraper assembly. The weight of the chute 402 holds the chute in place with connecting pins 428, 429. The chute can be connected to a drive assembly in a conveyor in any suitable manner.

[0153] The slide of the drive component can be located at any suitable position. For example, Figures 38 to 41 The chute 402 is located below the scraper assembly. Alternatively, the chute 402 can be located at any suitable position relative to the conveyor belt. For example, as Figures 42 to 43 As shown, the groove 402 can be located above the scraper. In an exemplary embodiment, the limiter-scraper assembly 460' may include a cover 630 to extend the sliding portion 610 of the groove 402 above the scraper. The exemplary cover 630 may be rotatable or otherwise movable to allow the limiter-scraper assembly 460' to move to a cleaning position when needed.

[0154] Figures 44 to 48 Another embodiment of the conveyor drive assembly 710 is shown, comprising a mounting assembly (shown as a pillow block bearing housing 760) for a bearing for a receiving roller limiter and an integral scraper saddle. Each bearing housing 760 includes a mounting portion 761 for mounting the bearing housing to an end plate 720 of the drive assembly, a bearing opening 762 for a bearing 772 for a receiving roller limiter, and a front saddle 726 for a base 61' for receiving a scraper assembly 60' (whose components are identical to those described above). The mounting portion 761 is connected to the bottom surface 721 of the mounting plate using fasteners (shown as bolts 780), but alternatively to another surface of the end plate. In one embodiment, the bolt 780 has two sets of threads and an opening in the mounting portion 761, and the bottom surface 721 is threaded to tightly engage each set of threads. In another embodiment, the bolt 780 is a sealing bolt comprising one or more sealing washers to seal the interface between the bolt 780 and the mounting assembly and the end plate 720.

[0155] In another embodiment, such as Figure 49 As shown, the drive assembly 810 includes opposing end plates 820 connected by a transverse mounting plate 812 and including a mounting assembly (shown as a limiter mounting plate 860) that conforms to the outer surface of the end plate 820. An exemplary limiter mounting plate 860 extends below each end plate 820 for mounting one or more removable limiters 870. The limiters 870 ensure proper engagement between the drive structure on the conveyor belt and the drive structure on the sprocket 814 or other drive element. Each end plate 820 includes an opening 825 for receiving a bearing 808 for rotatably accommodating the drive shaft 842 of the sprocket 814 or other drive element.

[0156] like Figure 50 and Figure 51As shown, each exemplary limiter mounting plate 860 includes a planar plate whose length gradually decreases from a concave curved top surface 861 to a flat bottom surface 862 to accommodate a bearing 808 and a drive shaft 842. The exemplary limiter mounting plates 860 have a uniform width, but the invention is not limited thereto. The upper portion of the plate forms a connection for mounting the limiter mounting plate 860 to the outer surface of an associated end plate 820. The exemplary connection includes bias openings 871, 872 for receiving fasteners 873, 874, which can be inserted through the limiter mounting plate 860 into corresponding openings in the end plate 820. The fasteners 873, 874 may include bolts with integrated sealing washers. The connection also includes bias pins 875, 876 for mounting grooves or other additional features. As shown in the figure, the outer end of the connecting portion includes a top fastener opening 871 and a pin 876 below the fastener opening 871, while the inner end of the connecting portion includes a top pin 875 and a fastener opening 872 below the block 875; however, the invention is not limited thereto. Below the connecting portion, a limiter mounting rod 880 extends laterally inward from the flat plate. An exemplary limiter mounting rod 880 includes a lateral channel 881 and an axial notch 882 for receiving the tip of the limiter 870 and the locking piece, so as to secure the limiter mounting rod 880 in the axial and lateral directions in the operating position; however, the limiter 870 can be secured to the mounting rod 880 in any suitable manner.

[0157] like Figure 52 As shown, during assembly, the front edge of the limiter 870 protrudes from the front edge of the limiter mounting plate 860, wherein the limiting surface of the limiter is adjacent to the conveyor belt driven by the sprocket 814.

[0158] Additionally, protrusion 890 can extend from back plate 812 to prevent the conveyor belt from bending backward.

[0159] An exemplary drive assembly 810 positions each limiter 870 on the side of the conveyor belt, with an open space between the limiter and the side to accommodate a segmented section of the conveyor belt. Alternatively, a mounting rod 880 may extend across the width of the drive assembly to accommodate a series of spaced, detachable limiters 870 spanning the width of the drive assembly.

[0160] refer to Figures 53 to 60 Another embodiment of the drive assembly 910 includes a mounting assembly, shown as a bearing housing 980 fastened to the outside of the end plate 920 for mounting the roller limiter 970 and the scraper assembly 960. The end plate 920 extends between laterally extending rear mounting plates 912. A sprocket 914 or other drive or reversing element is mounted between the end plates 920 using bearings in openings in the end plates 920, as described above.

[0161] The anti-entanglement bar 913 can extend from the rear plate 912 to prevent the teeth from getting caught on the frame members and stuck in the drive sprocket, but the invention is not limited to including the anti-entanglement bar 913.

[0162] Exemplary scraper assembly 960, such as Figure 55 As shown, the assembly includes a generally cylindrical base 961 with a tapered end and a cylindrical mounting block 966 extending between a pair of opposing scraper mounting plates 962. A scraper 963 extends upward from the base 961, similar to the scraper assembly embodiment described above. Each scraper plate 962 includes an opening 967 for receiving a protrusion on the cylindrical mounting block 966 to mount the cylindrical base 962 to the scraper plate. Each scraper mounting plate 962 includes a channel 972 between upper and lower legs, as described above, for mounting a leaf spring 990 or other tensioning element of the scraper assembly 960. A cylindrical pin 977 extends laterally at the end of the lower leg to restrict movement of the scraper assembly 960 and forms a pivot point (fulcrum) for the leaf spring 990. The exemplary cylindrical base 962 will be positioned in... Figures 53 to 55 Below the leaf spring 990 in the embodiment.

[0163] In an exemplary embodiment, a handle 964 extends upward from the scraper mounting plate 962 for manually moving the scraper assembly forward to clean a certain amount while keeping the leaf spring 990 within its elastic limit.

[0164] refer to Figures 56 to 58 Each bearing plate 980 includes a mounting portion (described below) for mounting the bearing plate to the outer surface of the associated end plate 920, a bearing opening 982 for receiving the bearing of the roller limiter 970 to rotatably mount and position the roller limiter 970 relative to the sprocket 914, and a saddle 926 for receiving the scraper assembly 960 and positioning the scraper 963 relative to the sprocket 914.

[0165] Figure 59 and Figure 60 The bearing plate 980, saddle 926, and bearing opening 982 are shown in detail. The connection includes a section for receiving fasteners. Figure 56The bearing plate 980 includes bias openings 971 and 972 (973, 974) in the bearing plate 970, wherein fasteners can be inserted through corresponding openings in the end plate 920. Fasteners 973 and 974 may include sealing bolts that include sealing washers that seal the interface between the fasteners and the connecting components. The exemplary connection also includes bias pins 975 and 976 that can be used to mount a slide or another element, but the bearing plate 980 does not require bias pins 975 and 976. The bearing plate 980 also includes a curved upper surface 861 to receive the sprocket bearing or the opening in the end plate 920. The bearing opening 982 may include a recess 983 to facilitate the insertion and removal of the bearing at the end of the roller limiter 970. The bearing plate 980 also includes an outwardly extending tension post 928 for tensioning the leaf spring 990 of the scraper assembly to push the scraper 963 into the appropriate position relative to the sprocket 914 and the conveyor belt. When the scraper assembly 960 is inserted into the saddle 926, the leaf spring 990 extends below the tensioning column 928, thereby pulling the opposite end of the leaf spring 990 upward and pushing the scraper 963 into the operating position.

[0166] The channel 978 on the outer surface of the bearing plate 960 can receive the cylindrical pin 977 of the scraper assembly 960 to ensure that when in place, the scraper is not forced too open, causing the leaf spring 990 to move beyond its yield.

[0167] Figures 61 to 66 Another embodiment of a drive assembly 1010 suitable for a segmented conveyor belt is shown, comprising a mounting assembly (shown as limiter plate 1060) mounted to the outer surface of each end plate 1020 for mounting a limiter assembly 1080 relative to a sprocket 1014 or other drive element. The exemplary limiter assembly 1080 includes spaced, detachable limiters 1081 for ensuring proper engagement between the drive structure on the conveyor belt and the drive structure on the sprocket 1014 or other drive element.

[0168] like Figure 64 and Figure 65As shown, each limiter plate 1060 includes a flat plate with a length extending from a concave curved top surface 1061 to a flat bottom surface 1062. Exemplary limiter mounting plates 1060 have a uniform width, but the invention is not limited thereto. The upper portion of the plate forms a connection for mounting the limiter mounting plate 1060 to the outer surface of an associated end plate 1020. The exemplary connection includes biased openings 1071, 1072 for receiving fasteners 1073, 1074, which can be inserted through the limiter mounting plate 1060 into corresponding openings in the end plate 1020. Fasteners 1073, 1074 may be sealing bolts including sealing washers for sealing the interface between the fastener and the connecting component. The connection also includes biased pins 1075, 1076 for mounting grooves or other additional features. Below the connection, an opening 1080 for mounting a limiter assembly 1068 extends through the limiter plate 1060. An exemplary opening 1068 includes an upper generally quadrilateral portion with chamfered edges and a lower portion in the shape of a rounded slot, the lower portion extending generally perpendicular to and intersecting the upper portion.

[0169] refer to Figure 66 An exemplary limiter assembly 1080 includes a lateral support rod 1082 comprising a vertical mounting rod 1083 having a cylindrical block 1084 at its top, the cylindrical block including a mounting piece 1085 for receiving an outwardly extending mounting piece 1085 in a limiter plate opening 1068. The lateral support rod 1082 also includes a series of spaced-apart vertical limiter rods 1086 terminating at a limiter mounting block 1087, the limiter mounting block including features for mounting limiters 1081. The space between the limiters 1081 is capable of accommodating segments on a conveyor belt used with the drive assembly 1010. In one embodiment, each limiter mounting block 1087 includes a lateral channel and intersecting axial notches to receive the tip and locking piece of the limiter 1081; however, the limiter can be secured to the limiter mounting block 1087 in any suitable manner.

[0170] refer to Figures 67 to 70 Exemplary drive components are not limited to the scraper components described above. Figures 67 to 70 Another embodiment of a scraper assembly 560 for a conveyor drive assembly is shown, comprising a pair of leaf springs 590 for deflecting a scraper tip 565 into contact with the conveyor belt. Each leaf spring 590 is mounted to a mounting base 562 extending from a mounting plate 564. A scraper base 561 with a narrowed neck 566 extends between the mounting plates 564 and mounts a scraper 563. A sealing bolt 576 mounts the forward end of the leaf spring 590 to the base 562. The relatively wider portions of the leaf springs 590 abut against a circular lip 573 forming a fulcrum for the leaf springs 590. The circular lip 573 is formed in a recess in the mounting base 562 to receive and secure the wider portions of the leaf springs 590.

[0171] like Figure 70As shown, the sealing bolt 576 includes an upper sealing washer 577 between the upper interface of the leaf spring and the bolt head, and a lower sealing washer 578 between the bottom of the leaf spring and the bolt shank and the mounting base 562.

[0172] The scraper assembly 560 can be used with any drive assembly such as those described above, using a deflection mechanism on the leaf spring 590, to selectively deflect the scraper tip 565 relative to the conveyor belt used with the drive assembly.

[0173] refer to Figure 71 and Figure 72 In another embodiment, the scraper assembly 660 of a conveyor belt drive assembly, such as those described above, includes a leaf spring 690 mounted to a molded mounting base 662 using a sealing bolt 676, as described above. The mounting base 662 includes a top channel 674 that separates a circular lip 673 forming the fulcrum of the leaf spring 690 from the opening of the sealing bolt 676. Additionally, a central protrusion 675 extends upward from the circular lip 673, aligns with the sealing bolt 676, and is received in a slot 691 of the leaf spring 690 to maintain the leaf spring in a lateral position on the mounting base 662. Other suitable methods of accommodating the leaf spring may be used. Other components of the exemplary scraper assembly 660 are similar to those of the mounting spring 560.

[0174] In another embodiment, such as Figure 73 and Figure 74 As shown, the scraper assembly 1260 of the drive assembly (such as the drive assembly described above) includes a dumbbell-shaped protrusion 1273 extending from one side of the mounting plate 1264. The dumbbell-shaped protrusion 1273 forms a fulcrum for deflecting the scraper to a scraping position relative to the conveyor belt driven by the drive assembly, and also constrains the leaf spring 1290 between the two end protrusions. The molded mounting portion 1262 includes an opening for receiving sealing bolts 1276 (such as the sealing bolt 576 and sealing washer described above) to fasten the leaf spring 1290 to the scraper assembly 1260.

[0175] In yet another embodiment, such as Figure 75 As shown, the scraper assembly 1360 includes a dumbbell-shaped protrusion 1373 for securing and providing a fulcrum for the leaf spring 1390, and a sealing bolt 1376 in a molded mounting portion 1362, both extending from one side of the mounting plate 1364. An exemplary molded mounting portion 1362 extends downward to recess the end of the leaf spring between the dumbbell-shaped protrusion 1373 and the molded mounting portion 1362, wherein the sealing bolt 1376 is located below the molded mounting portion 1362.

[0176] According to yet another embodiment, such as Figures 76 to 78As shown, the drive assembly 1110 includes an air-driven tensioning device 1130 for the scraper assembly 1160. The tensioning device 1130 allows the scraper assembly 1160 to move between an operating position and a cleaning position, wherein in the operating position, the scraper 1163 is deflected to contact the conveyor belt 1140, and in the cleaning position, the scraper 1163 is pushed away from contact with the conveyor belt 1140. The scraper assembly 1160 can be easily removed from the drive assembly 1110 without tools. The tensioning device 1130 includes a leaf spring 1131 mounted to a transverse mounting plate 1112, and a cylinder 1132 mounted to the leaf spring 1131 and the end of the end plate 1120 and having a piston 1133 connected to the eccentric scraper mounting plate 1162. To deflect the scraper 1163 into contact with the conveyor belt, the cylinder 1132 pushes the piston 1133 forward, causing the eccentric scraper mounting plate 1162 to rotate and push the scraper 1163 into contact with the conveyor belt 1140. The piston 1133 then retracts to pull the scraper 1163 away from the conveyor belt.

[0177] The scope of the claims should not be limited to the details of the exemplary embodiments described.

Claims

1. A drive assembly for a conveyor belt, comprising: A pair of opposite end plates; A driver, which is mounted to and extends between the pair of opposing end plates; The first mounting component is mounted onto the first end plate; A second mounting assembly is mounted to a second end plate. Each mounting assembly includes a connector for connecting the mounting assembly to the associated end plate and a mounting portion for mounting at least one of a scraper assembly and a limiter assembly to the associated end plate. The scraper assembly includes: - A pair of opposing scraper mounting plates, each scraper mounting plate including a cylindrical pin extending laterally from the scraper mounting plate; and - A leaf spring having a first end and a second end, the first end being fixed to a mounting portion on each scraper mounting plate, the second end being freely extended, the leaf spring being configured to pivot about the cylindrical pin to apply torque to the scraper assembly in order to move the scraper assembly to an operating position.

2. The drive assembly of claim 1, wherein the first mounting assembly and the second mounting assembly are mounted to the end plate using sealing bolts with sealing washers.

3. The drive assembly of claim 1, wherein each mounting assembly includes a bearing opening for receiving a bearing of a limiter and a front saddle for receiving a base of a scraper assembly.

4. The drive assembly of claim 3, further comprising a limiter-scraper assembly mounted to and extending between the mounting assemblies, the limiter-scraper assembly including a roller limiter having an end bearing mounted in the bearing opening and a scraper base mounted to receive a scraper in the front saddle.

5. The drive assembly of claim 1, wherein the mounting assembly is mounted to the bottom edge of the end plate.

6. The drive assembly of claim 1, wherein the mounting assembly is mounted to the outer surface of the end plate.

7. The drive assembly of claim 1, wherein the mounting assembly includes a limiter mounting rod for mounting a detachable limiter.

8. A drive assembly for a conveyor belt, comprising: A pair of opposite end plates; A driver, which is mounted to and extends laterally between the pair of opposing end plates; A scraper assembly, which is mounted to and extends between saddles connected to each end plate; and A tensioning device, mounted to each end plate, is used to selectively move the scraper assembly between an operating position and a cleaning position. The scraper assembly includes: - A pair of opposing scraper mounting plates, each scraper mounting plate including a cylindrical pin extending laterally from the scraper mounting plate; and - A leaf spring having a first end and a second end, the first end being fixed to a mounting portion on each scraper mounting plate, the second end being freely extended, the leaf spring being configured to pivot about the cylindrical pin to apply torque to the scraper assembly in order to move the scraper assembly to an operating position.

9. The drive assembly of claim 8, wherein the tensioning device comprises an air-driven tensioning device mounted to an end plate.

10. The drive assembly of claim 8, wherein the scraper assembly further comprises a scraper base for mounting scraper tips that extend laterally between each scraper mounting plate, the leaf spring extending longitudinally inward from each scraper mounting plate.

11. The drive assembly of claim 10, wherein the tensioning device further comprises a column, rod, and arm for selectively pushing one end of the leaf spring downward to deflect the scraper assembly to the operating position.

12. A scraper assembly for a conveyor belt, comprising: A pair of opposing scraper mounting plates, each scraper mounting plate including a cylindrical pin extending laterally from the scraper mounting plate; A generally cylindrical base, the generally cylindrical base extending laterally between the pair of opposing scraper mounting plates for mounting scrapers; and A leaf spring having a first end and a second end, the first end being mounted to a mounting portion connected to and extending longitudinally inward from each scraper mounting plate, the second end being freely extended, the leaf spring being configured to pivot about the cylindrical pin to apply torque to the scraper assembly to selectively deflect the scraper to a scraping position relative to the conveyor belt.

13. The scraper assembly of claim 12, wherein the mounting portion includes a shaped protrusion extending upward from a channel that extends longitudinally outward in an associated scraper mounting plate.

14. The scraper assembly of claim 12, wherein the generally cylindrical base includes a reduced-diameter neck for receiving in a scraper assembly seat between two end plates of a conveyor.

15. The scraper assembly of claim 12, further comprising a sealing bolt, the sealing bolt including a sealing washer for mounting the first end of the leaf spring to the mounting portion.

16. The scraper assembly of claim 15, wherein the mounting portion further comprises a shaped fulcrum spaced apart from the sealing bolt forming the fulcrum of the leaf spring.

17. The scraper assembly of claim 16, wherein the forming fulcrum forms a seat for restraining the lateral movement of the leaf spring.

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