A food material beveling machine

By designing the conveying device and cutting mechanism of the food slicing machine, the problem of existing vegetable cutting machines being unable to automatically slice at an angle has been solved, enabling automatic slicing of long strips of food, reducing the labor intensity of chefs and improving work efficiency.

CN224464775UActive Publication Date: 2026-07-07DONGGUAN DEYING FOOD MASCH CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DONGGUAN DEYING FOOD MASCH CO LTD
Filing Date
2025-06-06
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing vegetable cutters cannot automatically cut ingredients at an angle, forcing chefs to operate them manually, which increases workload and reduces efficiency.

Method used

A food slicing machine was designed, including a conveying device and a cutting mechanism. The conveying device is equipped with an inclined placement groove and a chain plate structure. The cutting mechanism achieves oblique slicing of food through a blade roller and blades. A limit wheel group and a top plate are used to stabilize the conveying and prevent accumulation.

Benefits of technology

It enables automatic diagonal slicing of long ingredients, reducing the labor intensity of chefs, improving work efficiency, and ensuring that the cut surface presents an elliptical or diamond shape, meeting the requirements of aesthetics and taste.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a food material beveling machine which is used for beveling processing of strip-shaped or processed strip-shaped food materials, and comprises a conveying device arranged on a rack and used for conveying materials to be processed; the conveying device comprises a conveying belt, a plurality of placement grooves are arranged on the conveying belt and are arranged in parallel to each other and are inclined to the length direction of the conveying belt; the food material beveling machine further comprises a cutter mechanism, the cutter mechanism comprises a cutter roller, the cutter roller crosses the conveying belt, both ends of the cutter roller are rotationally connected to the rack, a plurality of cutter blades are arranged on the cutter roller and are spaced apart from each other along an axis, and the cutter mechanism further comprises a cutter driving device which is in transmission connection with the cutter roller and is used for driving the cutter roller to drive the cutter blades to rotate and beveling process the materials conveyed by the conveying belt. Through the beveling machine, the long strip-shaped food materials can be beveling processed, so that the labor intensity of a chef can be reduced.
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Description

Technical Field

[0001] This utility model relates to the technical field of food processing equipment, specifically to a food slicing machine. Background Technology

[0002] Currently, there are more and more central canteens or centralized canteens, which can facilitate the staff in the area to obtain materials. In central canteens, because there are a lot of ingredients to be processed, operations such as cutting, washing or dehydrating the ingredients are often done by mechanical equipment, so as to quickly complete the preparation of ingredients.

[0003] When cutting long, strip-shaped ingredients or ingredients that have been processed into long, strip-shaped pieces, conventional vegetable cutters are currently used to cut the ingredients, making subsequent cooking easier. However, for some dishes that require specific cuts, the ingredients need to be cut at an angle to create an oval or diamond shape, thus satisfying the requirements of color, aroma, and taste. While current vegetable cutters can perform conventional cutting, the precise angled cutting still requires manual labor. This is time-consuming and laborious, placing a greater workload on chefs in the kitchen and resulting in lower efficiency.

[0004] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a food slicing machine to solve the above-mentioned technical problems. The technical solution adopted by this utility model is as follows:

[0006] A food slicing machine is used to slice strip-shaped or processed food ingredients at an angle, and includes a conveying device mounted on a frame for transporting the materials to be processed.

[0007] The conveying device includes a conveyor belt and a conveying drive device that is connected to the conveyor belt and drives it to reciprocate along the frame. Several placement slots are arranged on the conveyor belt along the length direction inclined to the conveyor belt.

[0008] The food slicing machine also includes a cutting mechanism, which is located above the conveyor belt and rotatably connected to the frame. The cutting mechanism includes...

[0009] A cutter roller, spanning the conveyor belt, with its two ends rotatably connected to the frame, and a plurality of blades spaced apart along its axis, also includes...

[0010] A cutting drive device is connected to the cutting roller drive to drive the cutting roller to rotate the blade and perform oblique slicing on the material conveyed by the conveyor belt.

[0011] Furthermore, the conveyor belt includes...

[0012] The chain includes two chains that are respectively opposite each other and drively connected to the conveying drive device;

[0013] The chain plate includes several interlocking parts, and the two ends of the chain plate are respectively fixedly connected to the chain blocks of the chain. Several peaks are arranged side by side and protrude from the surface of the chain plate. A valley is defined between two peaks. The valleys on two adjacent chain blocks interlock to define the placement groove.

[0014] Furthermore, a plurality of knife grooves are arranged side by side along the width direction of the conveyor belt and extending along the length direction of the conveyor belt, and the plurality of knife grooves are arranged corresponding to the blades, wherein the blades are embedded in the knife grooves when the cutter roller rolls.

[0015] Furthermore, a limiting structure is provided on the frame to limit the offset between the corresponding positions of the conveyor belt and the cutting mechanism. The limiting structure includes limiting wheel sets located on both sides of the conveyor belt, and the circumferential surface of the limiting wheel sets abuts against the side wall of the conveyor belt.

[0016] Furthermore, the limiting wheel assembly includes two frames, which are respectively located on both sides of the axis of the cutter roller. A guide wheel is rotatably connected to the frame, and the circumferential surface of the guide wheel abuts against the side wall of the conveyor belt.

[0017] Furthermore, a top plate is provided on the frame to restrict the accumulation of material between the blades during the cutting process. The top plate includes mounting parts located on both sides of the cutter roller and mounted on the frame, and a plurality of through slots for the blades to pass through are provided between the mounting parts, and the through slots define a top plate for placing between two blades.

[0018] Furthermore, the top material section includes:

[0019] The main body segment extends horizontally and is positioned between two adjacent blades;

[0020] The elastic segment includes two elastic segments located on both sides of the main body segment. One end of the elastic segment is integrally formed with the end of the main body segment, and the other end extends obliquely upward.

[0021] The connecting segment includes two segments located on the outer sides of the two elastic segments, and the elastic segments are integrally formed with the mounting portion through the connecting segment.

[0022] Furthermore, the conveying drive device includes:

[0023] The drive shaft is rotatably connected to one end of the frame, and two drive wheels, which are respectively connected to the conveyor belt, are fixedly mounted on it;

[0024] A driven shaft is rotatably connected to the other end of the frame, and two driven pulleys, which are respectively connected to the conveyor belt, are fixedly mounted on it.

[0025] A conveyor motor is fixedly mounted on the frame and connected to the drive wheel via a chain or synchronous belt drive.

[0026] Furthermore, a tensioning structure is also provided on the frame to adjust the tension of the conveyor belt and correct belt misalignment. The tensioning structure includes...

[0027] Two bearing seats are slidably connected to the frame along the conveying direction. The driven shaft is mounted on the bearing seats at both ends. The shaft also includes a fixed rod disposed on one side of the bearing seats along the conveying direction. An adjusting bolt is rotatably connected to the bearing seats. The adjusting bolt extends along the conveying direction and its other end is threaded to the fixed rod and passes through the fixed rod, defining it as the adjusting end for rotating the adjusting bolt.

[0028] The beneficial effects of this utility model are as follows:

[0029] This invention provides a beveling machine for beveling long, strip-shaped ingredients. During the beveling process, the material is placed on a conveyor belt and moved in a predetermined direction. The material is stably conveyed in a placement trough on the conveyor belt. In this embodiment, the axis of the placement trough is inclined to the axis of the conveyor belt, forming an acute angle. This causes the material to be placed at an angle relative to the axis of the conveyor belt. Upon reaching the relative position of the cutting mechanism, the cutting roller rotates under the drive of the cutting drive device, causing the blade to cut the material placed in the placement trough and conveyed by the conveyor belt. Because the material is placed at an angle relative to the axis of the conveyor belt, the cut surface of the material is beveled, i.e., elliptical or rhomboid slices. The beveling machine provided by this technical solution can beveling long, strip-shaped ingredients, thereby reducing the labor intensity of chefs. Attached Figure Description

[0030] Figure 1This is a three-dimensional structural diagram of the present invention.

[0031] Figure 2 This is a schematic diagram of the conveyor belt structure in this utility model.

[0032] Figure 3 This is a schematic diagram of the structure of the chain plate in this utility model.

[0033] Figure 4 This is a schematic diagram of the blade roller equipped with blades in this utility model.

[0034] Figure 5 This is a cross-sectional view of the blade roller equipped with blades in this utility model.

[0035] Figure 6 for Figure 1 A magnified view of a portion of point A in the middle.

[0036] Figure 7 This is an exploded structural diagram of the cutter roller and the top plate in this utility model.

[0037] In the diagram: 100-Frame; 200-Conveying device; 210-Conveyor belt; 220-Conveying drive device; 211-Placement trough; 300-Cutter mechanism; 310-Cutter roller; 311-Blade; 320-Cutter drive device; 212-Chain; 213-Chain plate; 214-Peak section; 215-Valley section; 216-Cutter groove; 111-Limit wheel assembly; 112-Frame; 113-Guide wheel; 330-Top plate; 331-Mounting section; 332-Through groove; 333-Top section; 3331-Main body section; 3332-Elastic section; 3333-Connecting section; 223-Driven shaft; 224-Driven wheel; 225-Drive motor; 226-Bearing seat; 227-Fixing rod; 228-Adjusting bolt; 229-Adjusting end. Detailed Implementation

[0038] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0039] This invention provides a beveling machine for beveling long, strip-shaped ingredients. During the beveling process, the material is placed on a conveyor 200 and moved in a predetermined direction by a conveyor belt 210. The material is stably conveyed in the placement groove 211 of the conveyor belt 210. In this embodiment, the axis of the placement groove 211 is inclined to the axis of the conveyor belt 210, forming an acute angle. This causes the material to be placed at an angle relative to the axis of the conveyor belt 210. Upon reaching the relative position of the cutting mechanism 300, the cutting roller 310 rotates under the drive of the cutting drive device 320, causing the blade 311 to cut the material placed in the placement groove 211 and conveyed by the conveyor belt 210. Because the material is placed at an angle relative to the axis of the conveyor belt 210, the cut portion is in an inclined shape, i.e., an elliptical or rhomboid slice. The beveling machine provided by this technical solution can beveling long, strip-shaped ingredients, thereby reducing the labor intensity of chefs.

[0040] Specifically, such as Figure 1-7 As shown, this utility model embodiment provides a food slicing machine for slicing strip-shaped or processed strip-shaped food ingredients at an angle. It includes a conveying device 200 mounted on a frame 100 for transporting the material to be processed. The conveying device 200 includes a conveyor belt 210 and a conveying drive device 220 connected to the conveyor belt 210 to drive it to reciprocate along the frame 100. A plurality of mutually arranged placement grooves 211 are provided on the conveyor belt 210 along its length inclined to the conveyor belt 210. The food slicing machine also includes a cutting mechanism 3. The cutting mechanism 300 is located above the conveyor belt 210 and rotatably connected to the frame 100. The cutting mechanism 300 includes a cutter roller 310 and a cutting drive device 320. Specifically, the cutter roller 310 spans the conveyor belt 210, with both ends rotatably connected to the frame 100. A plurality of blades 311 are spaced apart along the axis of the cutter roller 310. The cutting drive device 320 is connected to the cutter roller 310 to drive the cutter roller 310 and rotate the blades 311, thus performing oblique slicing on the material conveyed by the conveyor belt 210. In this embodiment, a motor is used as an example of the cutting drive device. The motor is connected to the guide roller via a chain or belt, thereby driving the guide roller to rotate the blades.

[0041] In this embodiment, strip-shaped or long strip-shaped ingredients usually refer to ingredients such as radishes, carrots, and cucumbers, or long strip-shaped meats such as chicken, duck, ham, sausage, and fish. During the cooking process, they are cut into oval slices, which makes the dish more visually appealing and ensures the dish meets the requirements of color, aroma, and taste. During the oblique cutting process, the aforementioned food materials are placed in the placement groove 211 of the conveyor belt 210, so that the materials are placed at an angle relative to the axis of the conveyor belt 210. In this embodiment, the axis of the placement groove 211 and the axis of the conveyor belt 210 form an acute angle, so that the placed materials are also set at an angle to the axis of the conveyor belt 210. After being conveyed by the conveyor belt 210 to the position corresponding to the cutter roller 310, the cutter roller 310 drives the blade 311 to rotate under the drive of the cutter drive device 320, thereby performing roller-type cutting on the materials located in the placement groove 211 and conveyed by the conveyor belt 210. Since the materials are placed at an angle and the cutting direction of the blade 311 is consistent with the axis of the conveyor belt 210, the cut materials are in the shape of an ellipse or rhombus, thus effectively completing the oblique cutting process of the materials. The oblique cutting process of the materials can be completed manually on the conveyor belt.

[0042] like Figure 1-3 As shown, the conveyor belt 210 includes a chain 212 and chain plates 213. The chain 212 includes two chains that are respectively opposed to each other and connected to the conveyor drive device 220. The chain plates 213 include a plurality of chains that are connected to each other, and the two ends of the chain plates 213 are respectively fixedly connected to the chain blocks of the chain 212. The chain plates 213 are provided with a plurality of peaks 214 that are arranged side by side and protrude from the surface of the chain plates 213. A valley 215 is defined between two peaks 214. The valleys 215 on two adjacent chain blocks are connected to each other to define a placement groove 211. Chain 212 and chain plate 213 constitute chain plate 213 type conveyor belt 210, which can create a conveying plane during the transmission of chain 212 to carry materials. Each chain plate 213 has a protruding peak 214, and the area between two peaks 214 is defined as a valley 215. After being connected, the valleys 215 of two adjacent chain plates 213 are connected to each other to form a long strip-shaped placement trough 211 for placing materials.

[0043] In this embodiment, in order to ensure that the material can be completely cut off without any interconnection when the material is obliquely cut, and to ensure the effectiveness of the oblique cutting, a plurality of parallel cutting grooves 216 are provided along the width direction of the conveyor belt 210 and extending along the length direction of the conveyor belt 210. The plurality of cutting grooves 216 are correspondingly provided with blades 311. When the cutting roller 310 rolls, the blades 311 are embedded in the cutting grooves 216. In other words, when the blade 311 is driven to roll by the cutter roller 310, the blade 311 is located within the cutter groove 216. That is, a part of the blade 311 is located within the conveyor belt 210. This allows the material on the conveyor belt 210 to be completely cut off during the material transmission process, preventing any interconnection. Furthermore, since the blade 311 is located within the cutter groove 216, the depth of the cutter groove 216 can be preset to prevent the cutter from contacting the conveyor belt 210, thus avoiding mutual wear caused by mutual rolling between the blade 311 and the conveyor belt 210, effectively ensuring the service life of the equipment.

[0044] Meanwhile, during the oblique cutting process of the material, the blade 311 is located within the groove 216. When the conveyor belt 210 is displaced due to shaking, the corresponding positions of the blade 311 and the groove 216 will shift, which may result in blade jamming or the blade 311 and the groove 216 becoming completely mismatched and unable to enter the groove 216. This will cause certain damage to the blade 311 or the conveyor belt 210. Therefore, in this embodiment, a limiting structure is also provided on the frame 100 to limit the shift of the corresponding positions of the conveyor belt 210 and the cutting mechanism 300. The limiting structure includes limiting wheel sets 111 located on both sides of the conveyor belt 210, and the circumferential surface of the limiting wheel sets 111 abuts against the side wall of the conveyor belt 210. The conveyor belt 210 is limited by the limiting wheel sets 111 set on both sides of the conveyor belt 210. Specifically, the limiting wheel sets 111 are set on both sides of the conveyor belt 210 at positions corresponding to the cutting mechanism 300, thereby limiting and correcting the conveyor belt 210 at positions corresponding to the cutter. When the axis of the conveyor belt 210 is tilted, the limiting wheel sets 111 will abut and restrict it, so that the conveyor belt 210 is positioned at the position corresponding to the cutting mechanism 300, and the blade 311 and the cutter groove 216 can be accurately aligned, thereby avoiding the blade 311 from getting stuck.

[0045] In this embodiment, as Figure 6As shown, the limiting wheel assembly 111 includes two frames 112, which are located on both sides of the axis of the cutter roller 310. Guide wheels 113 are rotatably connected to the frames 112, and the circumferential surface of the guide wheels 113 abuts against the side wall of the conveyor belt 210. The presence of two guide wheels 113 on one side of the conveyor belt 210 creates a restricted straight-line direction for the conveyor belt 210, meaning that movement within the conveyor belt 210 is restricted to the straight-line direction defined by the two guide wheels 113, thus preventing the conveyor belt 210 from deviating from its position relative to the cutter mechanism 300.

[0046] Meanwhile, in this embodiment, such as Figure 1 As shown, the conveying drive device 220 includes a drive shaft (not shown), a driven shaft 223, and a conveying motor 225. The drive shaft is rotatably connected to one end of the frame 100, and two drive wheels (not shown) are fixedly mounted on it and are respectively connected to the conveyor belt 210 for transmission. The driven shaft 223 is rotatably connected to the other end of the frame 100, and two driven wheels 224 are fixedly mounted on it and are respectively connected to the conveyor belt 210 for transmission. The conveying motor 225 is fixedly mounted on the frame 100 and is connected to the drive wheels through a chain 212 or a synchronous belt for transmission.

[0047] Furthermore, to prevent the conveyor belt 210 from running off-center and thus avoid misalignment between the blade 311 and the groove 216, a tensioning structure is provided on the frame 100 to adjust the tension of the conveyor belt 210 and correct any deviation. The tensioning structure includes two bearing seats 226 slidably connected to the frame 100 along the conveying direction. The driven shaft 223 is mounted on the bearing seats 226 at both ends. It also includes a fixing rod 227 positioned on one side of the bearing seats 226 along the conveying direction. An adjusting bolt 228 is rotatably connected to the bearing seats 226. The adjusting bolt 228 extends along the conveying direction, with its other end threaded onto the fixing rod 227, passing through the fixing rod 227, and defined as the adjusting end 229 of the adjusting bolt 228. In other words, adjusting the position of both ends of the driven shaft 223 adjusts the tension on both sides of the conveyor belt 210 in the width direction, thereby changing the force on both sides of the conveyor belt 210 and adjusting it when deviation occurs. Specifically, by rotating the adjusting end, the adjusting screw can be rotated, which in turn can pull or push the bearing seat, causing one end of the driven shaft to move, thereby changing the pulling force on one side of the conveyor belt to adjust the conveyor belt deviation.

[0048] During the cutting process of material on conveyor belt 210, to prevent the cut material from embedding into the space between the two blades 311 and accumulating and affecting the oblique cutting action of blades 311, such as... Figure 1 , 7As shown, in this embodiment, a top plate 330 is also provided on the frame 100 to restrict the accumulation of material between the blades 311 during the cutting process. The top plate 330 includes mounting portions 331 located on both sides of the cutter roller 310 and mounted on the frame 100. A plurality of through slots 332 for the blades 311 to pass through are provided between the mounting portions 331, and the through slots 332 define a top portion 333 for placement between two blades 311. During the oblique cutting of the material, the top portion 333 is positioned within the two blades 311, thereby restricting the material after it is placed within the two blades 311, preventing the space between the two blades 311 from being filled.

[0049] To improve the effectiveness of material restraint, the top section 333 includes a main body section 3331, an elastic section 3332, and a connecting section 3333. Specifically, as follows: Figure 7 As shown, the main body segment 3331 extends horizontally and is positioned between two adjacent blades 311; the elastic segment 3332 includes two segments located on both sides of the main body segment 3331, one end of the elastic segment 3332 is integrally formed with the end of the main body segment 3331, and the other end extends obliquely upward; the connecting segment 3333 includes two segments located outside the two elastic segments 3332, and the elastic segments 3332 are integrally formed with the mounting portion 331 through the connecting segment 3333. When the material is obliquely cut, as the material is embedded between the two blades 311 and gradually accumulates, the accumulated material presses against the main body section 3331, causing the elastic section 3332 to undergo elastic deformation. As the material continues to accumulate and press against the main body section 3331, the elastic potential energy of the elastic section 3332 continuously accumulates. After reaching the rated value, under the action of the elastic potential energy, the main body section 3331 pushes out the material accumulated between the two blades 311, thereby ensuring the effectiveness of the blades 311 in cutting the material at a polarity oblique angle.

[0050] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A food slicing machine for obliquely slicing strip-shaped or processed food ingredients, comprising a conveying device mounted on a frame for transporting the material to be processed, characterized in that: The conveying device includes a conveyor belt and a conveying drive device that is connected to the conveyor belt and drives it to reciprocate along the frame. Several placement slots are arranged on the conveyor belt along the length direction inclined to the conveyor belt. The food slicing machine also includes a cutting mechanism, which is located above the conveyor belt and rotatably connected to the frame. The cutting mechanism includes... A cutter roller, spanning the conveyor belt, with its two ends rotatably connected to the frame, and a plurality of blades spaced apart along its axis, also includes... A cutting drive device is connected to the cutting roller drive to drive the cutting roller to rotate the blade and perform oblique slicing on the material conveyed by the conveyor belt.

2. The food slicing machine according to claim 1, characterized in that, The conveyor belt includes The chain includes two chains that are respectively opposite each other and drively connected to the conveying drive device; The chain plate includes several interlocking parts, and the two ends of the chain plate are respectively fixedly connected to the chain blocks of the chain. Several peaks are arranged side by side and protrude from the surface of the chain plate. A valley is defined between two peaks. The valleys on two adjacent chain blocks interlock to define the placement groove.

3. The food slicing machine according to claim 1, characterized in that, A plurality of knife grooves are arranged side by side along the width direction of the conveyor belt and extend along the length direction of the conveyor belt. The knife grooves are arranged corresponding to the blades. When the knife roller rolls, the blades are embedded in the knife grooves.

4. The food slicing machine according to claim 3, characterized in that, A limiting structure is also provided on the frame to limit the offset between the corresponding positions of the conveyor belt and the cutting mechanism. The limiting structure includes limiting wheel sets located on both sides of the conveyor belt, and the circumferential surface of the limiting wheel sets abuts against the side wall of the conveyor belt.

5. A food ingredient oblique slicing machine according to claim 4, characterized in that, The limiting wheel assembly includes two frames, which are located on both sides of the axis of the cutter roller. Guide wheels are rotatably connected to the frames, and the circumferential surfaces of the guide wheels abut against the sidewalls of the conveyor belt.

6. The food slicing machine according to claim 1, characterized in that, A top plate is also provided on the frame to restrict the accumulation of material between the blades during the cutting process. The top plate includes mounting parts located on both sides of the cutter roller and mounted on the frame. A plurality of through slots for the blades to pass through are provided between the mounting parts, and the through slots define a top plate for placing between two blades.

7. A food ingredient oblique slicing machine according to claim 6, characterized in that, The top material section includes: The main body segment extends horizontally and is positioned between two adjacent blades; The elastic segment includes two elastic segments located on both sides of the main body segment. One end of the elastic segment is integrally formed with the end of the main body segment, and the other end extends obliquely upward. The connecting segment includes two segments located on the outer sides of the two elastic segments, and the elastic segments are integrally formed with the mounting portion through the connecting segment.

8. A food ingredient oblique slicing machine according to claim 1, characterized in that, The conveying drive device includes: The drive shaft is rotatably connected to one end of the frame, and two drive wheels, which are respectively connected to the conveyor belt, are fixedly mounted on it; A driven shaft is rotatably connected to the other end of the frame, and two driven pulleys, which are respectively connected to the conveyor belt, are fixedly mounted on it. A conveyor motor is fixedly mounted on the frame and connected to the drive wheel via a chain or synchronous belt drive.

9. A food ingredient oblique slicing machine according to claim 8, characterized in that, A tensioning structure is also provided on the frame to adjust the tension of the conveyor belt and correct belt misalignment. The tensioning structure includes: Two bearing seats are slidably connected to the frame along the conveying direction. The driven shaft is mounted on the bearing seats at both ends. The shaft also includes a fixed rod disposed on one side of the bearing seats along the conveying direction. An adjusting bolt is rotatably connected to the bearing seats. The adjusting bolt extends along the conveying direction and its other end is threaded to the fixed rod and passes through the fixed rod, defining it as the adjusting end for rotating the adjusting bolt.