A food packaging conveyor device

Abstract

This utility model proposes a food packaging conveying device, belonging to the field of food packaging technology, to solve the problem of inconvenient installation and maintenance of existing technologies where brushes or scrapers are placed below the conveyor. The device includes a conveyor with a conveying surface, and a crossbeam supported by a bracket above the conveyor. A cleaning device is mounted on the crossbeam. The cleaning device includes two rotating shafts rotatably connected to the crossbeam. A mounting base is connected to the bottom of the rotating shafts via a connecting assembly, and a brush is mounted on the bottom of the mounting base. The device also includes a drive device and a lifting device. In this utility model, the liftable brush assembly avoids interference during the conveying stage using the lifting device, and achieves efficient cleaning during the cleaning stage by contacting the brush with the drive device. Simultaneously, the rigid support of the crossbeam and bracket ensures the stability of the overall structure, meeting the high-frequency and high-reliability requirements of the food packaging industry for the switching between cleaning and conveying functions in conveying equipment.

Description

Technical Field

[0001] This utility model belongs to the field of food packaging technology, and specifically relates to a food packaging conveying device. Background Technology

[0002] In the food packaging industry, belt conveyors, with their efficient and continuous material transport capabilities, have become an indispensable key piece of equipment in production lines. Given the stringent standards for food hygiene and safety, maintaining the cleanliness of the conveyor belt is crucial for ensuring food quality and preventing contamination. Currently, the industry widely uses brushes or scrapers as cleaning tools for conveyor belts, removing residual food debris, stains, and other impurities through physical contact.

[0003] Placing brushes or scrapers above the conveyor belt allows for effective cleaning when the belt is unloaded (i.e., without any items being transported). However, during the transport phase, the brushes or scrapers protruding from the conveyor surface directly obstruct the normal transport of items. This can cause items to jam or shift on the conveyor belt, affecting transport efficiency; in severe cases, it can cause items to tip over, be damaged, or even lead to equipment malfunctions, seriously disrupting the orderly operation of the food packaging production line. Therefore, to ensure smooth transport, current technologies mostly place brushes or scrapers below the conveyor to avoid interfering with the transport of materials on the conveyor surface. While this arrangement ensures the stability of the transport process, it also introduces new problems. The space under conveyors is usually quite cramped, which limits the operating space for workers during the installation of brushes or scrapers, making installation difficult and hindering precise positioning and adjustment. After long-term operation, brushes or scrapers are prone to wear and loosening. When maintenance personnel perform inspections and replacements in the confined space, they face difficulties such as poor visibility and inconvenient operation. This not only significantly increases maintenance costs and time but also leads to prolonged production line downtime, reducing the production efficiency of food packaging and failing to meet the food packaging industry's demand for efficient and stable production. Utility Model Content

[0004] In view of this, the present invention provides a food packaging conveying device to solve the problem of inconvenient installation and maintenance of existing technologies where brushes or scrapers are placed below the conveyor.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A food packaging conveying device includes a conveyor having a conveying surface for conveying items. A crossbeam is supported above the conveyor by a bracket, and a cleaning device is provided on the crossbeam. The cleaning device includes two rotating shafts spaced apart on the crossbeam, each rotating shaft being rotatably connected to the crossbeam. A mounting base is connected to the lower part of each rotating shaft via a connecting assembly, and a brush is provided at the bottom of the mounting base to contact the conveying surface. The device also includes a drive unit and a lifting unit. The drive unit drives the two rotating shafts to rotate, and the lifting unit cooperates with the connecting assembly to raise or lower the mounting base.

[0007] In this technical solution, it should be noted that the food packaging conveyor uses a conveyor as its core carrier. A three-dimensional support structure is built on top of the conveyor via a bracket, and a crossbeam is erected directly above the conveyor surface, forming the installation reference for the cleaning device. The cleaning device uses two symmetrically distributed shafts on the crossbeam as power hubs. These shafts are rotatably connected to the crossbeam via bearings and other rotating connectors, ensuring flexible rotation under the drive. Each shaft is rigidly connected to a mounting base via a connecting component, forming a transmission link of "shaft-connecting component-mounting base." A brush is fixed at the bottom of the mounting base, directly contacting the conveyor surface. The brush bristles' material and density are adapted to the debris cleaning requirements of food packaging scenarios. The core function of the drive device is to provide rotational power to the shafts, thereby driving the connecting component and mounting base to rotate circumferentially, allowing the brushes to make dynamic contact during the cleaning process and improving cleaning efficiency. The lifting device works mechanically with the connecting assembly. When items need to be conveyed, the lifting device drives the connecting assembly to raise the entire mounting base, causing the brush to detach from the conveying surface by 10-100cm (the specific height can be adjusted according to the size of the items), completely eliminating interference with material transport. When entering cleaning mode, the mounting base lowers until the brush is in close contact with the conveying surface, effectively cleaning residual debris. This structural design cleverly solves the space limitations of traditional bottom-mounted cleaning devices. Through the liftable upper brush assembly, interference is avoided during the conveying phase using the lifting device, and efficient cleaning is achieved during the cleaning phase through contact between the drive device and the brush. At the same time, the rigid support of the beam and bracket ensures the stability of the overall structure, meeting the high-frequency and high-reliability requirements of the food packaging industry for switching between cleaning and conveying functions in conveying equipment.

[0008] Preferably, the driving device includes a motor and two gears, the two gears are respectively fixedly sleeved on two rotating shafts and the two gears mesh with each other, the motor is mounted on a crossbeam, and the output end of the motor is fixedly connected to one of the rotating shafts.

[0009] In this technical solution, it should be noted that the drive device adopts a gear meshing transmission structure, which has significant advantages in high transmission accuracy and strong stability. Specifically, a drive motor is fixedly installed on the top of the crossbeam, and its output shaft is rigidly fixed to the top of one of the rotating shafts via a key connection, forming the power input end. Transmission gears are coaxially fixed to the tops of the two rotating shafts, with the two gears horizontally opposite each other and meshing to form a 1:1 gear pair (or a specific transmission ratio can be designed according to cleaning requirements). When the motor starts, the output torque is transmitted to the driving gear through the rotating shaft, and then the driven gear is driven to rotate synchronously through gear meshing, thus causing the two rotating shafts to rotate at the same speed. This design utilizes the rigid connection characteristics of gear transmission to ensure that the two brush assemblies maintain synchronous movement during cleaning. In addition, the motor is directly fixed to the crossbeam, shortening the power transmission path and reducing energy loss. In food packaging applications, gears can be made of stainless steel or food-grade engineering plastics to meet hygiene standards and avoid the risk of metal shavings contamination. Combined with the liftable brush assembly below, the brushes can achieve dynamic contact and efficient friction with the conveyor belt during cleaning. When not cleaning, the brushes can be completely removed from the conveyor surface by the lifting device, thus completely eliminating the interference of traditional top cleaning devices on material conveying. This approach combines functionality and reliability.

[0010] Preferably, the connecting assembly includes a connecting shaft and a coupling, the top of the coupling is fixedly connected to the bottom of the rotating shaft, the bottom of the coupling is fixedly connected to the connecting shaft, and the mounting base is connected to the bottom of the connecting shaft; the connecting shaft is rotatably connected to the rotating shaft through the coupling, and the lifting device can drive the two connecting shafts to rotate.

[0011] In this technical solution, it should be noted that the connecting assembly adopts a "coupling-connecting shaft" transmission structure, constructing a rotatable connection and power transmission bridge between the rotating shaft and the mounting base, while providing a precise action execution interface for the lifting device. Specifically, the coupling, as the core transmission component, is rigidly fixed to the bottom end of the rotating shaft via a flange or key connection at its top, and coaxially fixed to the top end of the connecting shaft at its bottom, forming a vertical transmission chain of "rotating shaft-coupling-connecting shaft". The coupling allows for a certain angular deviation or relative rotation between the connecting shaft and the rotating shaft, ensuring the stability of power transmission while providing the lifting device with the freedom of motion to drive the connecting shaft to rotate. The connecting shaft extends vertically in a columnar shape, and its bottom end is fixedly connected to the mounting base via bolts, clips, etc., allowing the weight of the brush assembly and the contact force during cleaning to be transmitted to the rotating shaft and the crossbeam structure through the connecting shaft. The key is that the connecting shaft and the rotating shaft are "rotationally decoupled" through a coupling. The rotational motion of the rotating shaft under the action of the drive device (such as a gear meshing mechanism) is only used to drive the brush to swing or rotate in the circumferential direction to enhance the cleaning effect, while the lifting device acts independently on the connecting shaft, and by driving its rotation, it realizes the raising or lowering of the mounting base.

[0012] Preferably, the coupling includes a first connecting part and a second connecting part, the first connecting part being connected to a rotating shaft, the second connecting part being connected to a connecting shaft, and the first connecting part and the second connecting part being rotatably connected by a hinge shaft, the hinge shaft being parallel to the conveying direction of the conveyor.

[0013] In this technical solution, it should be noted that the first connecting part is rigidly fixed at its top end to the bottom end of the rotating shaft (e.g., via a key connection or bolt assembly), and rotates synchronously with the rotating shaft in a circumferential direction. The bottom end of the second connecting part is fixedly connected to the connecting shaft (e.g., via welding or threaded connection), and parallel ear plates extend from both sides of its top. Coaxial hinge holes are formed on the ear plates. The hinge shaft (made of 304 stainless steel) passes through the parallel ear plates of the second connecting part and is rotatably connected to the hinge fulcrum at the bottom of the first connecting part, forming a rotating pair with the hinge shaft as the fulcrum. The axis of the hinge shaft is completely parallel to the conveyor's conveying direction (i.e., along the length of the conveyor belt), allowing the second connecting part and the connecting shaft to perform pitch (up and down rotation) motion around this axis in a vertical plane perpendicular to the conveying direction. When the drive device (e.g., a gear meshing mechanism) drives the rotating shaft to rotate, the first connecting part rotates synchronously with the rotating shaft in a circumferential direction, and through the hinge shaft, drives the second connecting part and the connecting shaft to perform circumferential rotation around the axis of the rotating shaft. At this point, the brush at the bottom of the mounting base rotates in a circle around the pivot, creating rolling friction between the brush head and the conveyor belt surface. Compared to the sliding friction of traditional fixed brushes, this method removes particulate or sticky impurities more efficiently and reduces brush bristle wear. When the brush needs to be raised to a certain height, the lifting device drives the connecting shaft to rotate, raising the brush to the desired height and preventing any interference with the conveyed items. This structure, through the first connecting part, hinge shaft, and second connecting part, precisely constructs a rotating pair with the hinge shaft as the fulcrum, allowing the cleaning device to exit the conveying area during lifting, completely solving the interference problem of traditional top-mounted cleaning devices.

[0014] Preferably, the top of the crossbeam is provided with a mounting bracket, and a double-headed cylinder is provided on the mounting bracket. The double-headed cylinder is parallel to the width direction of the conveyor, the double-headed cylinder is located between two connecting shafts, and the two piston rods of the double-headed cylinder are respectively facing the two connecting shafts.

[0015] In this technical solution, it should be noted that the mounting bracket at the top of the crossbeam is rigidly fixed to the crossbeam by bolts. A double-headed cylinder, parallel to the width direction of the conveyor, is horizontally mounted on the bracket. This double-headed cylinder is located between two connecting shafts, with its two piston rods facing the corresponding connecting shafts and directly abutting the upper ends of the connecting shafts (non-hinged structure). Specifically, when the brush needs to be lifted, the piston rod of the double-headed cylinder extends outward, pushing the abutting part of the connecting shaft upward through its top end. This causes the connecting shaft to rotate upward around its hinge axis with the coupling (parallel to the conveying direction), causing the bottom mounting base and brush to detach from the conveying surface. When cleaning is required, the cylinder piston rod retracts inward, no longer applying thrust to the abutting part. Under the weight of the mounting base and brush, the connecting shaft rotates downward around the hinge axis, causing the brush to hang naturally and fit against the conveying surface. This design utilizes the linear extension and retraction of the piston rod to drive the rotation of the connecting shaft, achieving the return motion through gravity, simplifying the mechanical structure and reducing energy consumption. The dual-headed cylinders are symmetrically arranged along the width of the conveyor to ensure even force distribution on the connecting shafts on both sides, allowing for synchronous lifting or lowering and preventing brush tilting. In food packaging applications, this structure eliminates the need for additional power to lower the brushes, reducing energy consumption. During conveying, the piston rod extends to raise the brushes to a safe height, completely avoiding interference with materials. During cleaning, gravity allows for natural adhesion, achieving efficient cleaning while maintaining reliability and energy efficiency.

[0016] Preferably, the piston rod of the double-headed cylinder has an arc-shaped protrusion at its end.

[0017] In this technical solution, it should be noted that the protrusion adopts a spherical or cylindrical structure with a radius of 5-10mm (the specific curvature is determined based on contact stress calculations). Its function is to optimize the contact method with the connecting shaft. When the piston rod extends to push the connecting shaft, the arc-shaped protrusion forms point contact (spherical protrusion) with the connecting shaft. Compared with planar contact, this significantly reduces the coefficient of friction, reduces motion resistance, and makes the piston rod push the connecting shaft to rotate more smoothly. The surface of the arc-shaped protrusion is mirror-polished (roughness Ra≤0.4μm), and the material is food-grade 316L stainless steel or PEEK engineering plastic, which meets hygiene requirements and has sufficient wear resistance.

[0018] Preferably, the mounting base is threadedly connected to the connecting shaft.

[0019] In this technical solution, it should be noted that the mounting base and the connecting shaft are connected by a thread. Specifically, the bottom end of the connecting shaft is provided with an external thread (such as an M16×1.5 standard thread), and the top of the mounting base is provided with a corresponding internal thread blind hole. The two are connected detachably by screwing them together. This design brings several technical advantages: First, it has a quick replacement function. When the brush is worn and needs to be replaced, it can be easily removed from the connecting shaft by simply rotating the mounting base with a wrench or other tools, without disassembling the entire cleaning device, significantly improving maintenance efficiency. Second, it forms a height fine-tuning mechanism. By controlling the depth of the thread screwing in, the vertical height of the mounting base can be precisely adjusted (each rotation of the thread...). With an axial displacement of 1.5mm, the contact pressure between the brush and the conveyor surface can be finely adjusted to ensure consistent cleaning results. In food packaging production lines, this threaded connection structure allows operators to quickly replace brushes during equipment operation breaks without stopping the machine for cooling, meeting the needs of continuous production. At the same time, by finely adjusting the height of the mounting base, it can adapt to the cleaning requirements of conveyor belts of different thicknesses (such as 1.5mm-5mm), improving the versatility of the equipment. The mechanical self-locking characteristic of its threaded connection avoids the loosening risk that may occur with traditional snap-fit ​​or bolt connections, ensuring the reliability of the cleaning device during high-speed operation and reducing the risk of product contamination due to cleaning failure.

[0020] Preferably, the rotating shaft is rotatably connected to the crossbeam via a bearing.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0022] 1. In this utility model, the lifting brush assembly can avoid interference during the conveying stage by using a lifting device, and achieve efficient cleaning during the cleaning stage by using a drive device to contact the brush. At the same time, the rigid support of the crossbeam and the bracket ensures the stability of the overall structure, meeting the high frequency and high reliability requirements of the food packaging industry for the switching between cleaning and conveying functions of the conveying equipment.

[0023] 2. In this utility model, the drive device adopts a gear meshing transmission structure, which has significant advantages in high transmission accuracy and strong stability. Specifically, a drive motor is fixedly installed on the top of the crossbeam, and its output shaft is rigidly fixed to the top of one of the rotating shafts via a key connection, forming a power input end. Transmission gears are coaxially fixedly fitted onto the tops of the two rotating shafts, and the two gears are horizontally opposite each other and mesh with each other, forming a gear pair with a 1:1 transmission ratio (or a specific transmission ratio can be designed according to cleaning requirements). When the motor starts, the output torque is transmitted to the driving gear through the rotating shaft, and then the driven gear is driven to rotate synchronously through gear meshing, thereby causing the two rotating shafts to rotate at the same speed. This design utilizes the rigid connection characteristics of gear transmission to ensure that the two brush assemblies maintain synchronous movement during the cleaning process;

[0024] 3. In this utility model, the connecting shaft and the rotating shaft are "rotationally decoupled" through a coupling. The rotational motion of the rotating shaft under the action of the driving device (such as a gear meshing mechanism) is only used to drive the brush to swing or rotate in the circumferential direction to enhance the cleaning effect, while the lifting device acts independently on the connecting shaft and drives it to rotate to realize the raising or lowering of the mounting base.

[0025] 4. In this utility model, the double-headed cylinder allows the brush to fall back without additional power, reducing energy consumption. During conveying, the piston rod extends to lift the brush to a safe height, completely avoiding interference with the material. During cleaning, the brush naturally adheres to the material by gravity, achieving efficient cleaning and combining reliability and energy saving. Attached Figure Description

[0026] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a three-dimensional structural diagram of the bracket and cleaning device of this utility model;

[0029] Figure 3 for Figure 2 The rear oblique view;

[0030] Figure 4 This is a three-dimensional structural diagram of the motor, rotating shaft, connecting shaft, and double-headed cylinder of this utility model;

[0031] Figure 5 This is a three-dimensional structural diagram of the extended piston rod of the double-headed cylinder of this utility model.

[0032] Figure 6 This is a three-dimensional structural diagram of the rotating shaft, coupling, and connecting shaft of this utility model;

[0033] Wherein: 100-conveyor, 101-conveyor surface, 200-support, 201-beam, 300-cleaning device, 301-motor, 302-gear, 303-shaft, 304-coupling, 3041-first connecting part, 3042-hinged shaft, 3043-second connecting part, 305-connecting shaft, 306-mounting seat, 307-brush, 400-mounting bracket, 401-double-headed cylinder, 402-piston rod, 403-arc-shaped protrusion. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0040] Example

[0041] like Figures 1-6As shown, this embodiment proposes a food packaging conveying device, including a conveyor 100. The conveyor 100 has a conveying surface 101 for conveying items. A crossbeam 201 is supported above the conveyor 100 by a bracket 200. A cleaning device 300 is provided on the crossbeam 201. The cleaning device 300 includes two rotating shafts 303 spaced apart on the crossbeam 201. Each rotating shaft 303 is rotatably connected to the crossbeam 201. A mounting base 306 is connected to the bottom of each rotating shaft 303 through a connecting assembly. A brush 307 is provided at the bottom of the mounting base 306 to contact the conveying surface 101. The device also includes a driving device and a lifting device. The driving device drives the two rotating shafts 303 to rotate. The lifting device cooperates with the connecting assembly to drive the mounting base 306 to rise or fall. It should be noted that this food packaging conveying device uses the conveyor 100 as its core carrier. A three-dimensional support structure is built on top of the conveyor 200, and a crossbeam 201 is erected directly above the conveying surface 101, forming the installation reference for the cleaning device 300. The cleaning device 300 uses two symmetrically distributed rotating shafts 303 on the crossbeam 201 as its power hub. The rotating shafts 303 are rotatably connected to the crossbeam 201 via bearings and other rotating connectors, ensuring flexible rotation under the action of the drive device. Each rotating shaft 303 is rigidly connected to a mounting base 306 via a connecting component, forming a transmission link of "rotating shaft 303 - connecting component - mounting base 306". The bottom of the mounting base 306 is fixed with a brush 307 that directly contacts the conveying surface 101, and the material and density of its bristles are adapted to the debris cleaning requirements of food packaging scenarios. The core function of the drive unit is to provide rotational power to the rotating shaft 303, thereby driving the connecting component and the mounting base 306 to rotate circumferentially, so that the brush 307 forms dynamic contact during the cleaning process, improving cleaning efficiency. The lifting device works mechanically with the connecting component. When it is necessary to transport items, the lifting device drives the connecting component to raise the mounting base 306 as a whole, so that the brush 307 is detached from the conveying surface 101 by 10-100cm (the specific height can be adjusted according to the size of the items), completely eliminating interference with the material transport. When entering the cleaning mode, the mounting base 306 descends until the brush 307 is in close contact with the conveying surface 101, achieving effective cleaning of residual debris. This structural design cleverly solves the space limitation problem of traditional lower cleaning devices 300. Through the liftable upper brush 307 assembly, the lifting device avoids interference during the conveying stage, and the drive device contacts the brush 307 during the cleaning stage to achieve efficient cleaning. At the same time, the rigid support of the crossbeam 201 and the bracket 200 ensures the stability of the overall structure, meeting the high frequency and high reliability requirements of the food packaging industry for the switching between cleaning and conveying functions of the conveying equipment.

[0042] like Figure 4As shown, in this embodiment, the driving device includes a motor 301 and two gears 302. The two gears 302 are respectively fixedly sleeved on two rotating shafts 303, and the two gears 302 mesh with each other. The motor 301 is mounted on the crossbeam 201, and the output end of the motor 301 is fixedly connected to one of the rotating shafts 303. It should be noted that the driving device adopts a gear 302 meshing transmission structure, which has significant advantages in high transmission accuracy and strong stability. Specifically, the drive motor 301 is fixedly installed on the top of the crossbeam 201, and its output shaft is rigidly fixed to the top of one of the rotating shafts 303 through a key connection, forming a power input end. The top ends of the two rotating shafts 303 are respectively coaxially fixedly sleeved with transmission gears 302. The two gears 302 are horizontally opposite each other and mesh with each other, forming a gear pair with a 1:1 transmission ratio (or a specific transmission ratio designed according to cleaning requirements). When the motor 301 starts, the output torque is transmitted to the drive gear 302 through the rotating shaft 303. The drive gear 302 then meshes with the driven gear 302, causing the two rotating shafts 303 to rotate at the same speed. This design utilizes the rigid connection characteristic of the gear 302 transmission to ensure that the two brush assemblies 307 maintain synchronous movement during the cleaning process. In addition, the motor 301 is directly fixed to the crossbeam 201, shortening the power transmission path and reducing energy loss. In food packaging scenarios, the gear 302 can be made of stainless steel or food-grade engineering plastic to meet hygiene standards and avoid the risk of metal debris contamination. Together with the liftable brush 307 assembly below, it achieves dynamic contact and efficient friction between the brush 307 and the conveyor belt during cleaning. When not cleaning, the lifting device completely removes the brush 307 from the conveyor surface 101, completely eliminating the interference problem of the traditional upper cleaning device 300 on material conveying, thus combining functionality and reliability.

[0043] like Figure 4As shown, in this embodiment, the connecting assembly includes a connecting shaft 305 and a coupling 304. The top of the coupling 304 is fixedly connected to the bottom of the rotating shaft 303, and the bottom of the coupling 304 is fixedly connected to the connecting shaft 305. The mounting base 306 is connected to the bottom of the connecting shaft 305. The connecting shaft 305 is rotatably connected to the rotating shaft 303 via the coupling 304, and the lifting device can drive the two connecting shafts 305 to rotate. It should be noted that the connecting assembly adopts a "coupling 304-connecting shaft 305" transmission structure, constructing a rotatable connection and power transmission bridge between the rotating shaft 303 and the mounting base 306, while providing a precise action execution interface for the lifting device. Specifically, the coupling 304, as the core transmission component, has its top rigidly fixed to the bottom of the rotating shaft 303 via a flange or key connection, and its bottom is coaxially fixed to the top of the connecting shaft 305, forming a vertical transmission chain of "rotating shaft 303-coupling 304-connecting shaft 305". The coupling 304 allows for a certain angular deviation or relative rotation between the connecting shaft 305 and the rotating shaft 303, ensuring the stability of power transmission while providing the lifting device with the freedom of motion to drive the connecting shaft 305 to rotate. The connecting shaft 305 extends vertically in a columnar shape, and its bottom end is fixedly connected to the mounting base 306 by bolts, clips, or other means, so that the weight of the brush 307 assembly and the contact force during cleaning are transmitted through the connecting shaft 305 to the rotating shaft 303 and the crossbeam 201 structure. Crucially, the connecting shaft 305 and the rotating shaft 303 achieve "rotational decoupling" through the coupling 304—the rotational motion of the rotating shaft 303 under the action of the driving device (such as the gear 302 meshing mechanism) is only used to drive the brush 307 to oscillate or rotate circumferentially to enhance the cleaning effect, while the lifting device acts independently on the connecting shaft 305, driving its rotation to raise or lower the mounting base 306.

[0044] like Figure 6As shown, in this embodiment, the coupling 304 includes a first connecting part 3041 and a second connecting part 3043. The first connecting part 3041 is connected to the rotating shaft 303, and the second connecting part 3043 is connected to the connecting shaft 305. The first connecting part 3041 and the second connecting part 3043 are rotatably connected by a hinge shaft 3042, which is parallel to the conveying direction of the conveyor 100. It should be noted that the top end of the first connecting part 3041 is rigidly fixed to the bottom end of the rotating shaft 303 (e.g., by a key connection or bolt group) and rotates circumferentially synchronously with the rotating shaft 303; the bottom end of the second connecting part 3043 is fixedly connected to the connecting shaft 305 (e.g., by welding or threaded connection), and parallel ear plates extend from both sides of the top, with coaxial hinge holes on the ear plates. The hinge shaft 3042 (made of 304 stainless steel) passes through the parallel ear plate of the second connecting part 3043 and is rotatably connected to the hinge fulcrum at the bottom of the first connecting part 3041, forming a rotating pair with the hinge shaft 3042 as the fulcrum. The axis of the hinge shaft 3042 is completely parallel to the conveying direction of the conveyor 100 (i.e., along the length of the conveyor belt), allowing the second connecting part 3043 and the connecting shaft 305 to perform pitch (up and down rotation) motion around this axis in a vertical plane perpendicular to the conveying direction. When the drive device (such as the gear 302 meshing mechanism) drives the rotating shaft 303 to rotate, the first connecting part 3041 rotates synchronously with the rotating shaft 303, and drives the second connecting part 3043 and the connecting shaft 305 to perform circumferential rotation around the axis of the rotating shaft 303 through the hinge shaft 3042. At this time, the brush 307 at the bottom of the mounting base 306 rotates circumferentially around the rotating shaft 303, and the brush head forms rolling friction with the surface of the conveyor belt. Compared with the sliding friction of the traditional fixed brush 307, it can remove particulate or sticky impurities more efficiently and reduce brush bristle wear. When it is necessary to lift the brush 307 to a certain height, the lifting device drives the connecting shaft 305 to rotate. The connecting shaft 305 rotates upward until the brush 307 is lifted to a certain height, avoiding any interference with the conveyed items. This structure, through the first connecting part 3041, the hinge shaft 3042 and the second connecting part 3043, precisely constructs a rotating pair with the hinge shaft 3042 as the fulcrum, so that the cleaning device 300 exits the conveying area when lifted, completely solving the interference problem of the traditional upper cleaning device 300.

[0045] like Figure 2As shown, in this embodiment, a mounting bracket 400 is provided on the top of the crossbeam 201, and a double-headed cylinder 401 is provided on the mounting bracket 400. The double-headed cylinder 401 is parallel to the width direction of the conveyor 100, and is located between two connecting shafts 305. The two piston rods 402 of the double-headed cylinder 401 face the two connecting shafts 305 respectively. It should be noted that the mounting bracket 400 on the top of the crossbeam 201 is rigidly fixed to the crossbeam 201 by bolts, and a double-headed cylinder 401 parallel to the width direction of the conveyor 100 is horizontally mounted on it. The double-headed cylinder 401 is located between the two connecting shafts 305, and its two piston rods 402 face the corresponding connecting shafts 305 and directly abut against the upper end of the connecting shafts 305 (non-hinged structure). Specifically, when the brush 307 needs to be lifted, the piston rod 402 of the double-headed cylinder 401 extends outward, pushing the abutment of the connecting shaft 305 upward through its top end. This causes the connecting shaft 305 to rotate upward around its hinge shaft 3042 (parallel to the conveying direction) with the coupling 304, thus disengaging the bottom mounting base 306 and the brush 307 from the conveying surface 101. When cleaning is required, the cylinder piston rod 402 retracts inward, no longer applying thrust to the abutment. Under the weight of the mounting base 306 and the brush 307, the connecting shaft 305 rotates downward around the hinge shaft 3042, causing the brush 307 to hang naturally and come into contact with the conveying surface 101. This design utilizes the linear extension and retraction of the piston rod 402 to drive the rotation of the connecting shaft 305, achieving the return motion through gravity, simplifying the mechanical structure and reducing energy consumption. The dual-head cylinders 401 are symmetrically arranged along the width of the conveyor 100 to ensure that the connecting shafts 305 on both sides are subjected to uniform force and rise or fall synchronously, preventing the brush 307 from tilting. In food packaging scenarios, this structure can make the brush 307 fall back without additional power, reducing energy consumption. During conveying, the piston rod 402 extends to lift the brush 307 to a safe height, completely avoiding interference with materials. During cleaning, it naturally adheres to the material by gravity, achieving efficient cleaning and combining reliability and energy saving.

[0046] like Figure 5 As shown, in this embodiment, the piston rod 402 of the double-headed cylinder 401 has an arc-shaped protrusion 403 at its end. It should be noted that this protrusion adopts a spherical or cylindrical surface structure with a radius of 5-10 mm (the specific curvature is determined based on contact stress calculations). Its function is to optimize the contact method with the connecting shaft 305. When the piston rod 402 extends to push the connecting shaft 305, the arc-shaped protrusion 403 forms point contact (spherical protrusion) with the connecting shaft 305. Compared to planar contact, this significantly reduces the coefficient of friction and motion resistance, making the piston rod 402 push the connecting shaft 305 to rotate more smoothly. The surface of the arc-shaped protrusion 403 is mirror-polished (roughness Ra≤0.4μm), and the material is food-grade 316L stainless steel or PEEK engineering plastic, which meets hygiene requirements and has sufficient wear resistance.

[0047] In this embodiment, the mounting base 306 is threadedly connected to the connecting shaft 305. It should be noted that the mounting base 306 and the connecting shaft 305 are connected by a thread. Specifically, the bottom end of the connecting shaft 305 is provided with an external thread (such as an M16×1.5 standard thread), and the top of the mounting base 306 has a corresponding internal thread blind hole. The two are detachably connected by screwing. This design brings several technical advantages: First, it has a quick replacement function. When the brush 307 wears out and needs to be replaced, it can be easily removed from the connecting shaft 305 by simply rotating the mounting base 306 with a wrench or other tools, without disassembling the entire cleaning device 300, significantly improving maintenance efficiency. Second, it forms a height fine-tuning mechanism. By controlling the depth of thread insertion, the vertical height of the mounting base 306 can be precisely adjusted (each screw thread depth...). One rotation corresponds to an axial displacement of 1.5mm, thereby enabling fine-tuning of the contact pressure between the brush 307 and the conveyor surface 101, ensuring consistent cleaning results. In food packaging production lines, this threaded connection structure allows operators to quickly replace the brush 307 during equipment operation breaks without stopping for cooling, meeting continuous production needs. At the same time, by finely adjusting the height of the mounting base 306, it can adapt to the cleaning requirements of conveyor belts of different thicknesses (such as 1.5mm-5mm thickness range), improving equipment versatility. The mechanical self-locking characteristic of its threaded connection avoids the loosening risk that may occur with traditional snap-fit ​​or bolt connections, ensuring the reliability of the cleaning device 300 during high-speed operation and reducing the risk of product contamination due to cleaning failure.

[0048] In this embodiment, the rotating shaft 303 is rotatably connected to the crossbeam 201 via a bearing.

[0049] The working principle of this utility model is as follows:

[0050] In the initial state, the piston rod 402 of the double-headed cylinder 401 retracts, and the connecting shaft 305 rotates downward around the hinge shaft 3042 (parallel to the conveying direction) under the gravity of the mounting base 306 and the brush 307, so that the brush 307 at the bottom of the mounting base 306 is in contact with the conveying surface 101 of the conveyor belt. At this time, the motor 301 of the drive device starts and drives one of the rotating shafts 303 to rotate through the output end. The gear 302 on the rotating shaft 303 meshes with the gear 302 on the other rotating shaft 303, driving the two rotating shafts 303 to rotate synchronously. The rotating shaft 303 drives the connecting shaft 305 and the brush 307 at the bottom of the mounting base 306 to rotate circumferentially through the coupling 304, so as to perform rolling cleaning of food residues, debris and other contaminants on the conveyor belt. When it is necessary to transport items, the control system introduces compressed air into the rodless chamber of the double-headed cylinder 401. The piston rod 402 extends outward, and the arc-shaped protrusion 403 at its end contacts the upper end of the connecting shaft 305. Utilizing the low friction characteristics of the arc structure, the connecting shaft 305 is pushed to rotate upward around the hinge shaft 3042, which drives the mounting base 306 and the brush 307 to be raised to a safe height along a path perpendicular to the conveying surface 101. Since the double-headed cylinder 401 is symmetrically arranged along the width direction of the conveyor 100 and the effective areas at both ends of the piston are equal, the piston rods 402 on both sides extend synchronously, ensuring that the two connecting shafts 305 are raised synchronously, thus preventing the brush 307 from tilting or interfering with the material transport.

[0051] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0052] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A food packaging conveying device, characterized in that, Includes a conveyor (100) having a conveying surface (101) for conveying articles, and a crossbeam (201) supported above the conveyor (100) by a bracket (200), and a cleaning device (300) is provided on the crossbeam (201); The cleaning device (300) includes two rotating shafts (303) spaced apart on the crossbeam (201), each of the rotating shafts (303) being rotatably connected to the crossbeam (201), and a mounting base (306) being connected to the bottom of the rotating shaft (303) via a connecting assembly. The bottom of the mounting base (306) is provided with a brush (307) that contacts the conveying surface (101). It also includes a drive device and a lifting device, the drive device being used to drive two rotating shafts (303) to rotate, and the lifting device cooperating with the connecting assembly to drive the mounting base (306) to rise or fall.

2. The food packaging conveying device according to claim 1, characterized in that, The drive device includes a motor (301) and two gears (302). The two gears (302) are respectively fixedly sleeved on two rotating shafts (303) and the two gears (302) mesh with each other. The motor (301) is mounted on a crossbeam (201), and the output end of the motor (301) is fixedly connected to one of the rotating shafts (303).

3. The food packaging conveying device according to claim 1, characterized in that, The connecting assembly includes a connecting shaft (305) and a coupling (304), the top of the coupling (304) is fixedly connected to the bottom of the rotating shaft (303), the bottom of the coupling (304) is fixedly connected to the connecting shaft (305), and the mounting base (306) is connected to the bottom of the connecting shaft (305). The connecting shaft (305) is rotatably connected to the rotating shaft (303) via a coupling (304), and the lifting device can drive the two connecting shafts (305) to rotate.

4. A food packaging conveying device according to claim 3, characterized in that, The coupling (304) includes a first connecting part (3041) and a second connecting part (3043). The first connecting part (3041) is connected to the rotating shaft (303), and the second connecting part (3043) is connected to the connecting shaft (305). The first connecting part (3041) and the second connecting part (3043) are rotatably connected by a hinge shaft (3042), which is parallel to the conveying direction of the conveyor (100).

5. A food packaging conveying device according to claim 4, characterized in that, The top of the crossbeam (201) is provided with a mounting bracket (400), and a double-headed cylinder (401) is provided on the mounting bracket (400). The double-headed cylinder (401) is parallel to the width direction of the conveyor (100). The double-headed cylinder (401) is located between two connecting shafts (305), and the two piston rods (402) of the double-headed cylinder (401) are respectively facing the two connecting shafts (305).

6. A food packaging conveying device according to claim 5, characterized in that, The piston rod (402) of the double-headed cylinder (401) has an arc-shaped protrusion (403) at its end.

7. A food packaging conveying device according to claim 3, characterized in that, The mounting base (306) is threadedly connected to the connecting shaft (305).

8. A food packaging conveying device according to claim 1, characterized in that, The rotating shaft (303) is rotatably connected to the crossbeam (201) via a bearing.

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