Conveying structure for steamed stuffed bun conveying belt

Abstract

The invention discloses a conveying structure for a steamed stuffed bun conveying belt, and relates to the technical field of food processing machinery, the conveying structure comprises two support legs, five groups of dynamic reducing roller assemblies and five groups of cleaning assemblies, the five groups of dynamic reducing roller assemblies and the five groups of cleaning assemblies are respectively arranged at the tops of the two support legs, and the dynamic reducing roller assemblies and the cleaning assemblies are cooperated to realize the cleaning of the steamed stuffed bun conveying belt. Compared with the prior art, on-line eradication and full-period sanitary guarantee of cleaning dead corners in the continuous operation process of the steamed stuffed bun conveying belt are achieved, and different from a traditional lag scheme depending on high-pressure water passive washing and fixed scraper intermittent scraping, the cleaning operation of the high-end food conveying belt is more thorough and more efficient, and the cleaning efficiency is improved. Firstly, an annular cam track synchronous tooth chain transmission structure is matched with a flexible graphite base body, the bottleneck that a traditional cleaning device is not matched with the running rhythm of a conveying belt is broken through, strict mechanical synchronization of cleaning instructions is achieved, and it is guaranteed that the cleaning action can always accurately correspond to a target cleaning interval under the working conditions of different running speeds and different loads.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of food processing machinery, in particular to a conveying structure for steamed bun conveying belt. BACKGROUND

[0002] The conveying structure for steamed bun conveying belt is an automatic conveying system specially designed for the production process of steamed buns, and its core function is to stably convey raw buns or finished steamed buns in a high-temperature and humid environment, while ensuring the integrity of the product shape and hygiene standards.

[0003] In the current automatic conveying device for steamed food, the cleaning of the conveying belt mainly relies on high-pressure water impact, fixed scraper scraping or periodic manual brushing, and its core maintenance logic relies on the directional injection of external medium or contact-type physical scraping, combined with fixed-frequency intermittent shutdown cleaning, through passive cleaning or periodic manual intervention to try to maintain hygiene. However, this mode of external passive cleaning combined with static periodic intervention has inherent cleaning dead zones and a core technical bottleneck of missing dynamic online cleaning ability, which makes it difficult to match the actual cleaning effect and the microbial level hygiene standard required by high-end food manufacturing. This contradiction is sharply magnified in the continuous production conditions of high temperature and high humidity. In the conveying belt bearing surface area, the traditional scraper cannot touch the contact interface of the supporting roller, forming a longitudinal through sanitary cleaning blind area. The residual flour and stuffing oil in this area carbonize and bond in the humid environment, becoming an absolute breeding ground for microorganisms, which leads to an increase in the risk of product microbial indicators exceeding the standard. In the return surface area of the conveying belt, the static arrangement of the spray and scraper can only handle surface dust, and the cleaning efficiency of stubborn residues in the deep mesh hinge point and chain plate gap is greatly reduced, and the cleaning degree presents a gradual decay trend, which cannot meet the requirements of no dead angle and hygiene compliance.

[0004] Therefore, we propose a conveying structure for steamed bun conveying belt to solve the problems mentioned above. SUMMARY

[0005] The present application aims to provide a conveying structure for steamed bun conveying belt, which, through the synergistic effect of the dynamic variable-diameter roller assembly and the cleaning assembly, realizes the online eradication of cleaning dead angles and full-cycle hygiene protection of the steamed bun conveying belt during continuous operation, and is different from the traditional lag scheme that relies on passive washing of high-pressure water and intermittent scraping of fixed scrapers, making the cleaning operation of high-end food conveying belt more thorough and efficient.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a kind of steamed stuffed buns conveying belt conveying structure, including two supporting legs, five groups of dynamic variable diameter roller assemblies, five groups of cleaning components, five groups of the dynamic variable diameter roller assembly and five groups of cleaning components are respectively arranged in the top of two supporting legs, five groups of the dynamic variable diameter roller assembly is located in the outer wall side of five groups of cleaning components; The dynamic variable diameter roller assembly includes two cam tracks, two tapered shaft cores, two groups of arc-shaped wedges and two end covers, the profile curves of the two cam tracks form continuous concave sections and convex sections, and the two cam tracks are used to generate variable diameter timing reference, the two tapered shaft cores are used to transmit axial force, the two groups of arc-shaped wedges are used to change diameter size in radial expansion and contraction, and the two end covers are used to stabilize the variable diameter movement of the two groups of arc-shaped wedges. The cleaning component includes a scraper, a group of drainage grooves, and the scraper is used to remove residual adhesion, one end of the outer wall of the scraper is connected with a group of high-pressure spray openings, and the group of high-pressure spray openings is used to soften and flush residual materials, and the group of drainage grooves is used to collect sewage generated by scraping and direct the sewage out.

[0007] Preferably, the top of the two supporting legs is bolted to two racks, the outer surfaces of the two racks are respectively connected to a driving roller and a driven roller, one side of the outer wall of one of the racks is bolted to a servo motor, the outer surfaces of the driving roller and the driven roller are rotatably connected to a conveying belt, and the inner surface of the driving roller is rotatably connected to the outer surface of the power output shaft of the servo motor.

[0008] Preferably, the dynamic variable diameter roller assembly further includes two tooth chains, a center shaft, two fixed plates and two second guide sleeves, the two tooth chains are used to transmit the rotary motion of the driving roller to the annular cam track, the inner surfaces of the two tooth chains are rotatably connected to two gears, the inner surfaces of the two gears are rotatably connected to the power output shaft of the servo motor, the inner surfaces of the other two gears are rotatably connected to the rotary shaft of the driven roller, the top of each of the two cam tracks is connected to a group of thin metal sheets, and the two thin metal sheets are used to strengthen the wear resistance and scratch resistance of the surfaces of the two groups of cam tracks.

[0009] Preferably, the center shaft is fixed between the two racks, the outer surface of the center shaft is symmetrically sleeved with two sliding sleeves, the outer surfaces of the two sliding sleeves are respectively connected to roller bearings, the outer surfaces of the two roller bearings are respectively connected to the corresponding tapered shaft cores, the end face curvature of the outer wall of each of the two tapered shaft cores matches the end face curvature of the outer wall of one end of each of the two groups of arc-shaped wedges, the outer surfaces of the two groups of arc-shaped wedges are respectively fixedly connected to the inner surfaces of the corresponding group of arc-shaped plates, the outer surfaces of the two groups of arc-shaped plates are respectively coated with a rubber coating, the two groups of arc-shaped wedges are symmetrically placed, and the outer wall of one end of each of the two groups of arc-shaped wedges is fixedly connected to a solid rod.

[0010] Preferably, the outer surfaces of the two groups of solid rods are rotatably connected with pulleys, the outer surface of the central shaft is symmetrically sleeved with two ball bearings, the outer surfaces of the two ball bearings are connected with the inner surfaces of the corresponding end covers, a group of holes are formed in one side of the outer walls of the two end covers, sliding channels are formed between the inner surface walls of the two groups of holes, pulleys are slidably connected between the inner surface walls of the two groups of sliding channels, the inside of the central shaft is a hollow structure, two push rods are symmetrically movably inserted into the inside of the central shaft, and one end of the outer walls of the two push rods penetrates through the through holes formed in the outer surface of the central shaft and is boltedly connected with one end of the outer wall of the corresponding sliding sleeve.

[0011] Preferably, the outer surfaces of the two push rods are penetrated by first connecting rods, the outer surfaces of the two first connecting rods are rotatably connected with two first transmission rods, a second connecting rod is inserted between the outer surface walls of every two first transmission rods, the outer surfaces of the two second connecting rods are rotatably connected with two second transmission rods, the outer surfaces of the second connecting rods are sleeved with rollers, and one end of the outer walls of the two fixed plates is boltedly connected with one end of the outer wall of one of the racks.

[0012] Preferably, the outer walls of the two fixed plates are respectively fixedly connected with first guide sleeves and L-shaped plates on one side, the inner surfaces of the two first guide sleeves are slidably connected with the outer surfaces of the corresponding push rods, and the outer surfaces of the two L-shaped plates are provided with sliding grooves.

[0013] Preferably, the outer surface walls of the two sliding grooves are rollingly connected with the corresponding rollers, a third connecting rod is inserted between the outer surface walls of every two second transmission rods, the outer surfaces of the two third connecting rods are sleeved with connecting blocks, the top portions of the two connecting blocks are connected with pressing rods, and one end of the outer walls of the two pressing rods is sleeved with a bearing wheel.

[0014] Preferably, the outer surfaces of the two bearing wheels are rollingly connected with the top portions of the corresponding cam tracks, the outer surfaces of the two pressing rods are sleeved with limiting sleeves, springs are elastically connected between the two second guide sleeves and the two limiting sleeves, the inner surfaces of the two second guide sleeves are slidably connected with the outer surfaces of the two pressing rods, and one end of the outer wall of each of the two second guide sleeves is boltedly connected with one side of the outer wall of one of the racks.

[0015] Preferably, the cleaning assembly further comprises a cross rack, and the cross rack is fixed between the inner surface walls of the two racks, the outer walls of the cross rack are fixedly connected with sliding boxes on one side, the inner surface walls of the sliding boxes are slidably connected with the outer surface walls of the scrapers, a group of drainage grooves are formed in the top portion of the scraper, collecting boxes are connected with the outer walls of the scraper on both sides, an electric cylinder is boltedly connected with the outer wall of the cross rack on one side, a metal plate is fixedly sleeved with the shaft end of the electric cylinder, and the top portion of the metal plate is boltedly connected with the bottom portion of the scraper.

[0016] Compared with the prior art, the present application has the following advantages: In the present application, by means of the synergistic effect of the dynamic variable-diameter roller assembly and the cleaning assembly, compared with the prior art, the online eradication of the cleaning dead angle and the whole-cycle hygiene guarantee of the steamed-bun conveying belt in the continuous operation process are realized, which is different from the traditional passive flushing relying on high-pressure water and the lag scheme of intermittent scraping by fixed scrapers, so that the cleaning operation of high-end food conveying belts is more thorough and efficient. First, the ring-shaped cam track synchronous gear chain transmission structure cooperates with the flexible graphite matrix, breaks through the bottleneck of the mismatch between the traditional cleaning device and the conveying belt operation rhythm, realizes the strict mechanical synchronization of the cleaning instruction, ensures that the cleaning action can always accurately correspond to the target cleaning interval under different operating speeds and different load conditions, and through the precise displacement conversion of the bearing wheel and the pressure rod, ensures that the expansion and contraction of the variable-diameter roller and the advance and retreat of the cleaning assembly are always linked, which not only avoids the limitation that the fixed spraying cannot reach the contact blind area, but also prevents resource waste and equipment wear caused by indiscriminate continuous cleaning. Secondly, the multi-roller alternate support and bidirectional driving design of the dynamic variable-diameter roller assembly break through the limitation that traditional cleaning must be intervened in shutdown, through the guidance of the pulley and the end cap and the radial linkage of the arc-shaped wedge, a temporary cleaning space is periodically generated below the running conveying belt, the health dead angle hidden by the supported roller is fully exposed, and the precise cutting of the telescopic scraper and the integrated spray is matched, forming effective cleaning treatment, so that manual brushing is not needed due to frequent shutdown, and the inherent contradiction between hygiene quality and production efficiency in continuous production can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a front view structure perspective view of a conveying structure for a steamed-bun conveying belt in the present application; Figure 2 It is a bottom view structure perspective view of a conveying structure for a steamed-bun conveying belt in the present application; Figure 3 It is a position relationship diagram of a dynamic variable-diameter roller assembly and a cleaning assembly in a conveying structure for a steamed-bun conveying belt in the present application; Figure 4 It is an installation position structure schematic diagram of a dynamic variable-diameter roller assembly in a conveying structure for a steamed-bun conveying belt in the present application; Figure 5 It is an installation position structure schematic diagram of a gear chain, a cam track, and a thin metal sheet in a conveying structure for a steamed-bun conveying belt in the present application; Figure 6 It is an installation position structure schematic diagram of an end cap and a rubber coating in a conveying structure for a steamed-bun conveying belt in the present application; Figure 7 It is an installation position structure schematic diagram of a central shaft, a sliding sleeve, and a conical shaft core in a conveying structure for a steamed-bun conveying belt in the present application; Figure 8It is the installation position structure schematic drawing of the roller bearing, tapered shaft core, wedge block and arc plate in the conveying structure of the steamed-bun conveying belt of the application; Figure 9 It is the installation position structure schematic drawing of the bearing wheel, limiting sleeve and spring in the conveying structure of the steamed-bun conveying belt of the application; Figure 10 It is the installation position structure schematic drawing of the fixed plate, L-shaped plate and sliding groove in the conveying structure of the steamed-bun conveying belt of the application; Figure 11 It is the enlarged view of the structure at A in Figure 8 ; Figure 12 It is the enlarged view of the structure at B in Figure 8 ; Figure 13 It is the enlarged view of the structure at C in Figure 10 ; Figure 14 It is the installation position structure schematic drawing of the cleaning assembly in the conveying structure of the steamed-bun conveying belt of the application; Figure 15 It is the installation position structure schematic drawing of the cross frame, sliding bin and scraper in the conveying structure of the steamed-bun conveying belt of the application; Figure 16 It is the enlarged view of the structure at D in Figure 14 .

[0018] In the figure: 100, foot; 200, rack; 300, driving roller; 400, driven roller; 500, conveying belt; 600, servo motor; 700, dynamic variable-diameter roller assembly; 701, toothed chain; 702, cam track; 703, gear; 704, thin metal sheet; 705, center shaft; 706, sliding sleeve; 707, roller bearing; 708, tapered shaft core; 709, wedge block; 710, arc plate; 711, solid rod; 712, pulley; 713, ball bearing; 714, end cover; 715, push rod; 716, first guide sleeve; 717, fixed plate; 718, L-shaped plate; 719, sliding groove; 720, first connecting rod; 721, first transmission rod; 722, second connecting rod; 723, second transmission rod; 724, roller; 725, third connecting rod; 726, connecting block; 727, pressing rod; 728, bearing wheel; 729, limiting sleeve; 730, spring; 731, second guide sleeve; 732, rubber coating; 800, cleaning assembly; 801, cross frame; 802, sliding bin; 803, scraper; 804, drainage groove; 805, collection bin; 806, electric cylinder; 807, metal plate. DETAILED DESCRIPTION

[0019] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the scope of the present application.

[0020] As shown in Figures 1-3 The embodiment discloses a conveying structure for steam bag conveying belt, which comprises two supporting legs 100, five groups of dynamic variable-diameter roller assemblies 700 and five groups of cleaning assemblies 800. The five groups of dynamic variable-diameter roller assemblies 700 and the five groups of cleaning assemblies 800 are arranged on the top of the two supporting legs 100 respectively, and the five groups of dynamic variable-diameter roller assemblies 700 are arranged on the outer wall of the five groups of cleaning assemblies 800. As shown in Figure 4 and Figure 8 The dynamic variable-diameter roller assembly 700 comprises two cam tracks 702 (the profile curve of the cam track 702 is staggered in the circumferential direction in sequence, and the convex section and the concave section form a phase angle arrangement, so that at any time, at least a plurality of rollers are in the expanded diameter support state, and only one group or adjacent two groups of rollers are in the reduced diameter cleaning state), two tapered shaft cores 708, two groups of arc-shaped wedge blocks 709 and two end covers 714. The profile curve of the two cam tracks 702 forms a continuous concave section and a convex section, and the two cam tracks 702 are used to generate a variable-diameter timing reference. The two tapered shaft cores 708 are used to transmit axial force. The two groups of arc-shaped wedge blocks 709 are used to change the diameter size in the radial expansion and contraction. The two end covers 714 are used to stabilize the variable-diameter movement of the two groups of arc-shaped wedge blocks 709. (A light reset spring (not shown in the figure) can be arranged between the bottom of each group of arc-shaped wedge blocks 709 and the end cover 714 to ensure that the wedge block can be quickly and reliably reset in the radial direction after the tapered shaft core 708 is withdrawn.) As shown in Figure 16 The cleaning assembly 800 comprises a scraper 803 and a group of drainage grooves 804. The scraper 803 is used to remove residual adhesives. One end of the outer wall of the scraper 803 is connected with a group of high-pressure spray openings. The group of high-pressure spray openings is used to soften and flush the residual adhesives. The group of drainage grooves 804 is used to collect the sewage generated by scraping and direct the sewage out.

[0021] The embodiment is mainly aimed at the current automatic conveying device for steaming of noodles, the cleaning of the conveying belt 500 mainly depends on high-pressure water impact, fixed scraper 803 scraping or regular shutdown manual brushing, the core maintenance logic depends on the directional injection of external medium or contact physical scraping, combined with fixed frequency intermittent shutdown cleaning, passive cleaning or periodic manual intervention is tried to maintain hygiene, however, this mode of external passive cleaning combined with static periodic intervention has inherent cleaning dead zone and dynamic online cleaning ability missing core technical bottleneck, which leads to the difficulty in matching the actual cleaning effect and the microbial level hygiene standard required by high-end food manufacturing, the contradiction is sharply enlarged in the continuous production condition of high temperature and high humidity, in the conveying belt 500 bearing area, the traditional scraper 803 cannot touch the contact interface of the supporting roller, forming a longitudinal through health cleaning blind area, the residual noodles and stuffing oil in the wet and hot environment carbonize and bond, becoming an absolute breeding ground for microorganisms, resulting in product microbial index exceeding the standard and significantly increasing the risk, in the conveying belt 500 return area, the static arrangement of the spray and the scraper 803 can only deal with the surface dust, the cleaning efficiency of the stubborn residues in the deep mesh hinge point and the chain plate gap is greatly reduced, and the cleaning degree presents a gradual attenuation trend, which cannot meet the health compliance requirements of no dead angle.

[0022] The embodiment is completed to solve the problems of the prior art. By the cooperation of the dynamic variable-diameter roller assembly 700 and the cleaning assembly 800, compared with the prior art, the online eradication of the cleaning dead angle of the steamed-bun conveying belt 500 in the continuous operation process and the whole-cycle hygiene guarantee are realized. Unlike the traditional passive flushing relying on high-pressure water and the lag scheme of intermittent scraping by the fixed scraper 803, the cleaning operation of the high-end food conveying belt 500 is more thorough and efficient. First, the cam track 702 synchronous gear chain 701 transmission structure cooperates with the flexible graphite matrix, breaks through the bottleneck of the mismatch between the traditional cleaning device and the conveying belt 500 operation tempo, realizes the strict mechanical synchronization of the cleaning instruction, ensures that the cleaning action can always accurately correspond to the target cleaning interval under different running speeds and different load conditions, and at the same time, through the precise displacement conversion of the bearing wheel 728 and the pressing rod 727, the expansion and contraction of the variable-diameter roller and the advance and retreat of the cleaning assembly 800 are always linked, which avoids the limitation that the fixed spraying cannot reach the contact blind area and prevents resource waste and equipment wear caused by indiscriminate continuous cleaning. Secondly, the multi-roller alternate support and the two-way drive design of the conical shaft core 708 of the dynamic variable-diameter roller assembly 700 break through the limitation that the traditional cleaning must be intervened in shutdown, through the guidance of the pulley 712 and the end cover 714 and the radial linkage of the arc plate 710 and the wedge block 709, a temporary cleaning space is periodically generated below the running conveying belt 500, the hygiene dead angle hidden by the supported roller is fully exposed, and the precise cutting of the telescopic scraper 803 and the integrated spray is matched, forming effective cleaning treatment, so that manual brushing without relying on frequent shutdown can solve the inherent contradiction that hygiene quality and production efficiency cannot be reconciled in continuous production.

[0023] According to Figures 1-2 As shown in the figure, the top of the two feet 100 is bolted to two racks 200, and the outer walls of the two racks 200 are respectively connected to a driving roller 300 and a driven roller 400. One side of the outer wall of one of the racks 200 is bolted to a servo motor 600, the outer surfaces of the driving roller 300 and the driven roller 400 are rotatably connected to a conveying belt 500, and the inner surface of the driving roller 300 is rotatably connected to the outer surface of the power output shaft of the servo motor 600.

[0024] In the embodiment of the present application, firstly, both the two supporting legs 100 are made of 304 stainless steel material, which can stably support the weight of the entire conveying structure and avoid shaking of the equipment during high-frequency operation, secondly, the rack 200 as the core installation reference is fixed with the supporting legs 100 through bolts, which is not only convenient to disassemble and assemble, but also can be quickly disassembled and cleaned during subsequent maintenance, which can effectively adapt to the hygiene requirements of the food processing scene, and the servo motor 600 directly drives the driving roller 300 to rotate, and then drives the driven roller 400 to rotate synchronously through the friction force between the driving roller 300 and the conveying belt 500, which can ensure the stable running speed of the conveying belt 500 and avoid the steamed buns from tilting and stacking due to uneven speed during the conveying process, and the direct connection between the driving roller 300 and the servo motor 600 reduces the intermediate transmission loss, so that the power transmission is more efficient, which is suitable for the continuous high-intensity operation requirements of the steamed bun production line.

[0025] According to Figures 1-7 As shown in the figure, the dynamic variable-diameter roller assembly 700 further comprises two tooth chains 701, a center shaft 705, two fixed plates 717, and two second guide sleeves 731, and the two tooth chains 701 are used to transmit the rotary motion of the driving roller 300 to the annular cam track 702, the inner walls of the two tooth chains 701 are meshed and connected with two gears 703, the inner surfaces of the two gears 703 are rotatably connected with the outer surface of the power output shaft of the servo motor 600, the inner surfaces of the other two gears 703 are rotatably connected with the outer surface of the rotating shaft of the driven roller 400, and the top of each of the two cam tracks 702 is connected with a group of thin metal sheets 704, and the two thin metal sheets 704 are used to strengthen the wear resistance and scratch resistance of the surfaces of the two groups of cam tracks 702.

[0026] In the embodiment of the present application, firstly, the tooth chain 701 and the gear 703 adopt meshing transmission, which can completely avoid the problem of slipping compared with the traditional belt transmission, so that the rotary speed of the cam track 702 is effectively synchronized with the rotary motion of the driving roller 300, which is the key to ensure the accuracy of the variable-diameter timing, and only when the cam track 702 and the conveying belt 500 are in consistent operation rhythm, the subsequent variable-diameter action can correspond to the cleaning interval, wherein the fixed plate 717 is fixed with the rack 200 through bolts, which can provide a stable installation basis for the center shaft 705 and the second guide sleeve 731, and can prevent these core components from deviating during movement, wherein the cam track 702 is made of food-grade flexible graphite, which can fully adapt to the circular motion of the tooth chain 701, and the thin metal sheet 704 at the top of the cam track 702 is made of 304 stainless steel material, which can effectively resist the wear caused by the long-term rolling of the bearing wheel 728.

[0027] According to Figures 7-8As shown, the center shaft 705 is fixed between the two racks 200, the outer surface of the center shaft 705 is symmetrically sleeved with two sliding sleeves 706, the outer surface of the two sliding sleeves 706 is connected with a roller bearing 707, the outer surface of the two roller bearings 707 is connected with a corresponding one of the two tapered shaft cores 708, the outer wall of one end of the two tapered shaft cores 708 is matched with the end surface arc of the outer wall of one end of the two sets of arc-shaped wedge blocks 709, the outer surface of the two sets of arc-shaped wedge blocks 709 is fixedly connected with the inner surface of a corresponding one of the two sets of arc-shaped plates 710, the outer surface of the two sets of arc-shaped plates 710 is covered with a rubber coating 732, and the two sets of arc-shaped wedge blocks 709 are symmetrically placed, and the outer wall of one end of the two sets of arc-shaped wedge blocks 709 is fixedly connected with a solid rod 711.

[0028] In the embodiment of the application, first, the center shaft 705 is made of 40Cr quenched and tempered steel, the center shaft 705 serves as a fixed reference for the entire dynamic variable-diameter roller assembly 700, can effectively resist the radial force generated when the tapered shaft core 708 slides, and avoids deformation, second, the cooperation of the sliding sleeve 706 and the roller bearing 707 can convert the sliding friction of the tapered shaft core 708 into rolling friction, making the tapered shaft core 708 slide more smoothly in the axial direction and not jamming, and the roller bearing 707 can effectively inhibit the synchronous rotation motion from being transmitted to the entire dynamic variable-diameter roller assembly 700, and third, the end surface arc of the tapered shaft core 708 and the wedge block 709 is strictly matched, which can ensure that the axial force is uniformly transmitted to each wedge block 709 and avoid local wear caused by uneven force, and the rubber coating 732 on the outer surface of the arc-shaped plate 710 is made of food-grade silicone, which can increase the friction with the inner surface of the conveyor belt 500 and avoid scratching caused by direct metal contact with the conveyor belt 500.

[0029] According to Figure 8 and Figure 11 As shown, the outer surface of the two sets of solid rods 711 is rotatably connected with a pulley 712, the outer surface of the center shaft 705 is symmetrically sleeved with two ball bearings 713, the outer surface of the two ball bearings 713 is connected with the inner surface of a corresponding one of the two end covers 714, one side of the outer wall of the two end covers 714 is provided with a group of holes, a slide is formed between the inner surface walls of the two groups of holes, the pulley 712 is slidably connected between the inner surface walls of the two slides, the inside of the center shaft 705 is a hollow structure, two push rods 715 are symmetrically movably inserted into the inside of the center shaft 705, and one end of the outer wall of the two push rods 715 passes through the through hole formed in the outer surface of the center shaft 705 and is bolted to the outer wall of one end of a corresponding one of the two sliding sleeves 706.

[0030] In the embodiment of the present application, first, the pulley 712 on the solid rod 711 cooperates with the slide of the end cover 714, which can strictly limit the movement direction of the arc-shaped wedge 709, so as to make the arc-shaped plate 710 only move in the radial direction and cannot move axially along with the conical shaft core 708, which is the key to ensure uniform variable diameter. The ball bearing 713 allows the end cover 714 to rotate smoothly around the central shaft 705, avoiding wear caused by direct friction between the end cover 714 and the central shaft 705. The central shaft 705 is designed as a hollow structure, which can not only reduce the overall weight, but also provide installation space for the push rod 715. The push rod 715 is fixed with the sliding sleeve 706 through bolts, which can accurately transmit the external driving force to the conical shaft core 708, ensuring the stable sliding stroke of the conical shaft core 708, and further ensuring the variable diameter accuracy of the arc-shaped wedge 709.

[0031] According to Figure 10 and Figure 13 , the outer surfaces of the two push rods 715 are penetrated by the first connecting rods 720, the outer surfaces of the two first connecting rods 720 are rotatably connected with the two first transmission rods 721, the second connecting rods 722 are inserted between the outer surface walls of every two first transmission rods 721, the outer surfaces of the two second connecting rods 722 are rotatably connected with the two second transmission rods 723, the outer surfaces of the second connecting rods 722 are sleeved with the rollers 724, and one end of the outer wall of the two fixed plates 717 and one end of the outer wall of the rack 200 are bolted.

[0032] In the embodiment of the present application, first, the transmission structure composed of the first connecting rod 720, the first transmission rod 721 and the second connecting rod 722 can stably convert the swing of the second transmission rod 723 into the axial movement of the push rod 715. This multi-connecting-rod cooperation mode can effectively disperse the force transmission and avoid damage to the components caused by excessive stress on a single point. The rollers 724 on the second connecting rods 722 cooperate with the sliding grooves 719 of the L-shaped plates 718 to provide accurate guidance for the movement of the first transmission rod 721 and the second transmission rod 723, preventing deviation during transmission. Secondly, the fixed plates 717 firmly fix these transmission components on the rack 200, ensuring the position stability of the entire transmission chain. Even when the equipment is running at high frequency, the transmission will not be misaligned due to vibration, ensuring the responsiveness of the variable diameter action.

[0033] According to Figure 10 , the outer wall of the two fixed plates 717 is fixedly connected with the first guide sleeve 716 and the L-shaped plate 718 on one side, respectively. The inner surfaces of the two first guide sleeves 716 are slidably connected with the outer surfaces of the corresponding push rods 715, and the outer surfaces of the two L-shaped plates 718 are provided with sliding grooves 719.

[0034] In the embodiment of the present application, firstly, the first guide sleeve 716 adopts wear-resistant copper sleeve material, which is matched with the sliding of the push rod 715, can strictly limit the movement direction of the push rod 715, and make the push rod 715 only slide in the axial direction, without radial skewing, which avoids the uneven stress of the conical shaft core 708 caused by the skewing of the push rod 715, and further prevents the eccentricity of the arc-shaped wedge 709 when the diameter changes, secondly, the sliding groove 719 on the L-shaped plate 718 is processed by numerical control milling, which can effectively reduce the frictional resistance when the roller 724 rolls, and the arc-shaped track of the sliding groove 719 can guide the smooth movement of the roller 724, laying a foundation for the accurate action of the subsequent pressing rod 727.

[0035] According to Figure 10 and Figure 13 It is shown that the outer walls between the two sliding grooves 719 are connected with the corresponding roller 724 rolling, the outer walls between every two second transmission rods 723 are inserted with the third connecting rod 725, the outer surfaces of the two third connecting rods 725 are sleeved with the connecting block 726, the top of the two connecting blocks 726 is connected with the pressing rod 727, and the outer wall of the two pressing rods 727 is sleeved with the bearing wheel 728 at one end.

[0036] In the embodiment of the present application, firstly, the roller 724 rolls in the sliding groove 719, which can greatly reduce the wear compared with sliding contact, can prolong the service life of the component, and the cooperation of the third connecting rod 725 and the connecting block 726 can convert the up-down linear motion of the pressing rod 727 into the swing of the second transmission rod 723, wherein the connecting block 726 adopts an integral molding structure, which avoids the loosening problem caused by the splicing of multiple components, and the bearing wheel 728 at one end of the pressing rod 727 adopts double-row angular contact ball bearings, which can bear the composite force in the radial and axial directions, and the rolling contact with the cam track 702 can ensure that the force transmission is more uniform, without causing damage to the cam track 702 and the bearing wheel 728 due to excessive local stress, and the rotation of the bearing wheel 728 can also make the action of the pressing rod 727 more smooth, reducing the risk of jamming.

[0037] According to Figure 10As shown, the outer surface of the two bearing wheels 728 is in rolling connection with the top of the corresponding cam track 702, the outer surface of the two pressing rods 727 is sleeved with the limiting sleeve 729, the two limiting sleeves 729 and the two second guide sleeves 731 are elastically connected with the springs 730, the inner surface of the two second guide sleeves 731 is in sliding connection with the outer surface of the two pressing rods 727, and one end of the outer wall of the two second guide sleeves 731 is in bolt connection with one side of the outer wall of the corresponding rack 200 (that is, when the bearing wheel 728 runs to the convex section of the cam track 702, the pressing rod 727 is lifted up, and through the connecting rod mechanism composed of the third connecting rod 725, the second transmission rod 723, the second connecting rod 722, the first transmission rod 721 and the first connecting rod 720, the upward displacement is converted into the outward thrust of the push rod 715, the sliding sleeve 706 and the conical shaft core 708 are pushed outwards, the arc-shaped wedge block 709 is forced to expand radially, and the diameter of the roller is increased to support the conveyor belt 500. When the bearing wheel 728 runs to the recessed section of the cam track 702, the pressing rod 727 moves downward under the action of the spring 730, and through the above connecting rod mechanism, the upward displacement is converted into the inward pulling force of the push rod 715, the conical shaft core 708 is pulled inwards, and the arc-shaped wedge block 709 is radially retracted under the action of gravity or a reset mechanism such as a light spring, so that the diameter of the roller is reduced to form a cleaning gap).

[0038] In the embodiment of the application, first, the spring 730 is always in a slightly compressed state, which can provide a continuous downward pressure for the pressing rod 727, ensuring that the bearing wheel 728 is always in close contact with the outer contour of the cam track 702 and will not be separated due to vibration or rotation of the cam track 702. This is the core of ensuring the timing accuracy of the variable diameter. Only when the bearing wheel 728 is in close contact with the cam track 702 can the position of the pressing rod 727 be adjusted in real time following the change of the contour of the cam track 702. Secondly, the sliding fit between the second guide sleeve 731 and the pressing rod 727 can limit the pressing rod 727 to move only up and down, avoiding the displacement of the pressing rod 727 to cause the contact between the bearing wheel 728 and the cam track 702 to be misaligned. Meanwhile, the limiting sleeve 729 can limit the maximum compression amount of the spring 730 to prevent the spring 730 from losing elasticity due to excessive compression, and also to avoid the pressing rod 727 from moving downward excessively to damage the cam track 702, ensuring the stable operation of the entire dynamic variable-diameter roller assembly 700.

[0039] According to Figures 15-16As shown, the cleaning assembly 800 further comprises a cross frame 801 fixed between the inner walls of the two racks 200, and the outer walls of the cross frame 801 are fixedly connected with sliding boxes 802, the inner walls of the sliding boxes 802 and the outer walls of the scraper 803 are slidingly connected, a group of drainage grooves 804 are arranged on the top of the scraper 803, the outer walls of the scraper 803 are connected with collecting boxes 805, the outer walls of the cross frame 801 are bolted with electric cylinders 806, the shaft ends of the electric cylinders 806 are fixedly sleeved with metal plates 807, and the top of the metal plates 807 is bolted with the bottom of the scraper 803.

[0040] In the embodiment of the present application, first, the cross frame 801 serves as the installation carrier of the cleaning assembly 800 and is fixed with the rack 200 by bolts, which can ensure the relative position of the cleaning assembly 800 and the conveying belt 500 stable and ensure that the scraper 803 can accurately align the cleaning interval of the conveying belt 500, wherein the sliding box 802 is made of food-grade stainless steel and is smooth inside without dead angle, and the sliding cooperation with the scraper 803 can make the scraper 803 flexible and stretchable, when the dynamic variable-diameter roller assembly 700 is shrunk to form a cleaning gap, the electric cylinder 806 can drive the scraper 803 to quickly stretch out and scrape the residues adhered to the inner surface of the conveying belt 500, secondly, the drainage grooves 804 on the top of the scraper 803 can timely guide the sewage washed down by the high-pressure spray nozzle away, avoiding the secondary pollution caused by the accumulation of sewage on the surface of the scraper 803, and the collecting boxes 805 on both sides of the scraper 803 can collect the solid residues scraped off, which can be cleaned regularly without frequent disassembly, and meanwhile, the electric cylinder 806 is connected with the scraper 803 through the metal plate 807, which can accurately control the stretching length of the scraper 803, which can ensure complete cleaning and will not cause the conveying belt 500 to be worn out due to the excessive stretching of the scraper 803.

[0041] In use, first servo motor 600 access to external power supply start, so that the drive roller 300 rotation, then driven by the conveyor belt 500 roller 400 synchronous operation, at the same time, the drive roller 300 shaft gear 703 through the chain 701 transmission, drive ring cam track 702 with the conveyor belt 500 completely synchronized angular velocity rotation, cam track 702 top concave-convex profile as the variable diameter instruction physical carrier, its recessed section corresponding to the expansion of the roller, that is, support working condition can ensure stable conveying of the conveyor belt 500, while the convex section corresponding to the roller shrinkage, that is, the formation of the cleaning gap working condition can be for cleaning components 800 let, the subsequent process when the cam track 702 begins to rotate synchronously, its top thin metal sheet 704 and bearing wheel 728 continuous rolling contact, when the bearing wheel 728 operation to the recessed section of the cam track 702, the pressure rod 727 under the pre-pressure of the spring 730 down, through the third connecting rod 725 drive second drive rod 723 swing downward around the pivot, then the second drive rod 723 through the second connecting rod 722 drive first drive rod 721 swing synchronous, finally through the first connecting rod 720 swing motion into axial thrust of the push rod 715, the push rod 715 push the sliding sleeve 706 along the central shaft 705 sliding, sliding sleeve 706 through the roller bearing 707 drive tapered shaft core 708 synchronous outward displacement, when the tapered shaft core 708 outward displacement, tapered shaft core 708 taper and arc wedge 709 inner inclined surface fit, can convert axial thrust into radial thrust, at this time the arc wedge 709 in solid rod 711, pulley 712 in along the end cover 714 slide way constraint, accurate radial expansion, drive the outer rubber 732 diameter increase, at this time the roller is in the expansion state, tightly fit the inner surface of the conveyor belt 500, realize stable support, when the bearing wheel 728 rolling to the convex section of the cam track 702, cam profile lift bearing wheel 728, drive the pressure rod 727 to overcome the spring 730 elastic force upward sliding, through the connecting rod mechanism reverse transmission, push rod 715 generate axial tension, immediately tapered shaft core 708 synchronous inward retraction, at this time the tapered shaft core 708 on the wedge 709 radial thrust disappears, wedge 709 in its own gravity and end cover 714 slide way constraint radial contraction, at the same time the rubber 732 diameter decreases, form a temporary cleaning gap under the conveyor belt 500, at this time the electric cylinder 806 drive scraper 803 along the slide 802 radial extension, scraper 803 top spray nozzle first injection of high pressure cleaning fluid, then the scraper 803 blade fit the inner surface of the conveyor belt 500 mechanical scraping, at the same time the cleaning generated sewage through the drain 804 flow to both sides of the collection bin 805, avoid dripping pollution, clean up after the electric cylinder 806 pull scraper 803 back to the slide 802, waiting for the next cleaning gap, wherein five groups of dynamic variable diameter roller assembly 700 in the precise control of the cam track 702, in turn alternate complete recessed section expansion support, convex section contraction cleaning, recessed section expansion support cycle,Both uninterrupted support of the conveyor belt 500 and periodic opening of the cleaning zone are ensured.

[0042] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified or some of the technical features can be replaced by equivalent features by those skilled in the art, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A conveying structure for a steam bun conveyor belt, characterized in that: It includes two support legs (100), five sets of dynamic variable diameter roller assemblies (700), and five sets of cleaning assemblies (800). The five sets of dynamic variable diameter roller assemblies (700) and the five sets of cleaning assemblies (800) are respectively installed on the top of the two support legs (100), and the five sets of dynamic variable diameter roller assemblies (700) are located on one side of the outer wall of the five sets of cleaning assemblies (800). The dynamic diameter-changing roller assembly (700) includes two cam tracks (702), two tapered shafts (708), two sets of arc-shaped wedges (709), and two end caps (714). The contour curves of the two cam tracks (702) form continuous concave and convex sections. The two cam tracks (702) are used to generate a diameter-changing timing reference. The two tapered shafts (708) are used to transmit axial force. The two sets of arc-shaped wedges (709) are used to expand and contract radially to change the diameter. The two end caps (714) are used to stabilize the diameter-changing movement of the two sets of arc-shaped wedges (709). The cleaning component (800) includes a scraper (803) and a set of drainage channels (804). The scraper (803) is used to remove adhesive residues. One end of the outer wall of the scraper (803) is connected to a set of high-pressure spray nozzles, which are used to soften and rinse the residues. The set of drainage channels (804) is used to collect the wastewater generated by scraping and direct it out.

2. The conveying structure for steamed bun conveyor belt according to claim 1, characterized in that: The tops of the two support legs (100) are bolted to two frames (200). A drive roller (300) and a driven roller (400) are respectively connected between the outer walls of the two frames (200). A servo motor (600) is bolted to one side of the outer wall of one of the frames (200). A conveyor belt (500) is rotatably connected to the outer surfaces of the drive roller (300) and the driven roller (400). The inner surface of the drive roller (300) is rotatably connected to the outer surface of the power output shaft of the servo motor (600).

3. The conveying structure for steamed bun conveyor belt according to claim 2, characterized in that: The dynamic variable diameter roller assembly (700) also includes two toothed chains (701), a central shaft (705), two fixed plates (717), and two second guide sleeves (731). The two toothed chains (701) are used to transmit the rotational motion of the active roller (300) to the annular cam track (702). Two gears (703) are meshed between the inner surfaces of the two toothed chains (701). The inner surfaces of the two gears (703) are rotatably connected to the outer surface of the power output shaft of the servo motor (600), and the inner surfaces of the other two gears (703) are rotatably connected to the outer surface of the driven roller (400) shaft. A set of thin metal sheets (704) are connected to the top of the two cam tracks (702), and the two thin metal sheets (704) are used to enhance the wear resistance and scratch resistance of the surfaces of the two sets of cam tracks (702).

4. The conveying structure for steamed bun conveyor belt according to claim 3, characterized in that: The central shaft (705) is fixed between two frames (200). Two sliding sleeves (706) are symmetrically sleeved on the outer surface of the central shaft (705). Roller bearings (707) are connected to the outer surfaces of the two sliding sleeves (706). The outer surfaces of the two roller bearings (707) are sleeved and connected to a corresponding conical shaft core (708). The arc of one end face of the outer wall of the two conical shaft cores (708) matches the arc of one end face of the outer wall of the two sets of arc wedges (709). The outer surfaces of the two sets of arc wedges (709) are fixedly connected to the inner surface of a corresponding set of arc plates (710). The outer surfaces of the two sets of arc plates (710) are covered with rubber (732). The two sets of arc wedges (709) are placed symmetrically. A solid rod (711) is fixedly connected to one end of the outer wall of the two sets of arc wedges (709).

5. The conveying structure for steamed bun conveyor belt according to claim 4, characterized in that: The outer surfaces of the two sets of solid rods (711) are rotatably connected to pulleys (712). The outer surface of the central shaft (705) is symmetrically fitted with two ball bearings (713). The outer surfaces of the two ball bearings (713) are connected to the inner surface of a corresponding end cap (714). A set of holes is opened on one side of the outer wall of the two end caps (714). A slide is opened between the inner surface walls of the two sets of holes. The inner surface walls of the two sets of slides are slidably connected to pulleys (712). The interior of the central shaft (705) is a hollow structure. Two push rods (715) are symmetrically inserted into the interior of the central shaft (705). One end of the outer wall of each push rod (715) passes through a through hole opened on the outer surface of the central shaft (705) and is bolted to one end of the outer wall of a corresponding sliding sleeve (706).

6. The conveying structure for steamed bun conveyor belt according to claim 5, characterized in that: The outer surfaces of the two push rods (715) are each penetrated by a first connecting rod (720). The outer surfaces of the two first connecting rods (720) are rotatably connected to two first transmission rods (721). A second connecting rod (722) is inserted between the outer walls of each pair of first transmission rods (721). The outer surfaces of the two second connecting rods (722) are rotatably connected to two second transmission rods (723). Rollers (724) are fitted on the outer surfaces of the second connecting rods (722). One end of the outer wall of the two fixed plates (717) is bolted to one end of the outer wall of one of the frames (200).

7. The conveying structure for steamed bun conveyor belt according to claim 6, characterized in that: One guide sleeve (716) and an L-shaped plate (718) are fixedly connected to one side of the outer wall of each of the two fixed plates (717). The inner surfaces of the two first guide sleeves (716) are slidably connected to the outer surface of a corresponding push rod (715). The outer surfaces of the two L-shaped plates (718) are provided with grooves (719).

8. The conveying structure for steamed bun conveyor belt according to claim 7, characterized in that: Each of the two slides (719) is rotatably connected to a corresponding roller (724) between its outer walls. A third connecting rod (725) is inserted between the outer walls of each pair of second transmission rods (723). A connecting block (726) is fitted on the outer surface of each of the two third connecting rods (725). A pressure rod (727) is connected to the top of each of the two connecting blocks (726). A bearing wheel (728) is fitted on one end of the outer wall of each of the two pressure rods (727).

9. The conveying structure for steamed bun conveyor belt according to claim 8, characterized in that: The outer surfaces of the two bearing wheels (728) are rolledly connected to the top of a corresponding cam track (702). The outer surfaces of the two pressure rods (727) are fitted with limiting sleeves (729). The two limiting sleeves (729) and the two second guide sleeves (731) are elastically connected by springs (730). The inner surfaces of the two second guide sleeves (731) are slidably connected to the outer surfaces of the two pressure rods (727). One end of the outer wall of the two second guide sleeves (731) is bolted to one side of the outer wall of a corresponding frame (200).

10. The conveying structure for steamed bun conveyor belt according to claim 2, characterized in that: The cleaning assembly (800) also includes a crossbeam (801), which is fixed between the inner walls of the two frames (200). A slide chamber (802) is fixedly connected to one side of the outer wall of the crossbeam (801). The inner walls of the slide chambers (802) are slidably connected to the outer walls of the scraper (803). A set of drainage channels (804) is opened on the top of the scraper (803). A collection chamber (805) is connected to both sides of the outer wall of the scraper (803). An electric cylinder (806) is bolted to one side of the outer wall of the crossbeam (801). A metal plate (807) is fixedly sleeved on the shaft end of the electric cylinder (806). The top of the metal plate (807) is bolted to the bottom of the scraper (803).

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