Bean vermicelli cutting device for food processing

By designing a fan cutting device including conveying, pressing and adjusting components, the problem of the inability to adjust the cutting size and fan position shift in the prior art is solved, and high accuracy and high efficiency fan cutting is achieved.

CN222932837UActive Publication Date: 2025-06-03SUZHOU LIUFUZI FOOD CO LTD
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Patent Information

Application Number
CN202421009827.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-11
Publication Date
2025-06-03
Estimated Expiration
2034-05-11

AI Technical Summary

Technical Problem

The existing vermicelli cutting device for food processing has a single function and cannot change the cutting size according to actual needs. Moreover, when cutting dry vermicelli, position shifts are prone to occur due to the toughness and strength of the vermicelli, resulting in uneven lengths after cutting, affecting accuracy.

Method used

A fan cutting device including a workbench, a conveying assembly, a pressing assembly and a adjustment assembly is designed. The conveying component realizes the conveying rollers of the fan by driving the conveying rollers of the motor. The pressing component presses the fan through the push rod and the spring structure. The adjustment component realizes the adjustment of the cutting length through the motor-driven slide rod and the moving frame.

Benefits of technology

The function of adjusting the cutting size according to actual needs is realized, avoiding fan position deviation and improving cutting accuracy and efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a vermicelli cutting device for food processing in the field of cutting devices, which comprises a working table, supporting legs are welded at four corners of the bottom surface of the working table, and a conveying assembly for conveying vermicelli for cutting is arranged on one side of the top surface of the working table. According to the bean vermicelli cutting device, the adjusting assembly is arranged, the cutting assembly can be driven by the driving assembly to adjust the cutting position of the bean vermicelli, and therefore equal-distance cutting can be conducted within the adjusting range according to the actually-needed size; the bean vermicelli cutting device is simple in operation and convenient to use, practicability is improved, meanwhile, the bean vermicelli cutting operation efficiency is improved, secondly, the bean vermicelli can be subjected to auxiliary pressing during cutting by arranging the pressing assembly, the situation that the cutting size accuracy is affected due to large position deviation caused by toughness and strength of the bean vermicelli during cutting is avoided, and the bean vermicelli cutting device is convenient to use.
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Description

Technical Field

[0001] The utility model relates to the field of cutting devices, in particular to a vermicelli cutting device for food processing. Background Art

[0002] After the vermicelli is extruded through the extruder and cooled, it needs to be cut according to specifications to facilitate subsequent packaging operations.

[0003] However, the existing vermicelli cutting devices for food processing have relatively simple functions. Most of them can only cut vermicelli to a fixed length and cannot change the cutting size according to actual needs. In addition, when cutting dry vermicelli, due to the certain toughness and strength of vermicelli, the vermicelli is prone to large position displacement, resulting in uneven lengths of the dry vermicelli after cutting, affecting the accuracy of the cutting size and being inconvenient for people to use. Therefore, those skilled in the art provide a vermicelli cutting device for food processing to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a vermicelli cutting device for food processing to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vermicelli cutting device for food processing, comprising a workbench, wherein supporting legs are welded at the four corners of the bottom surface of the workbench, a conveying component for conveying vermicelli for cutting is provided on one side of the top surface of the workbench, a pressing component located on the top surface of the workbench for pressing the vermicelli when cutting is provided on one side of the conveying component, an adjusting component for adjusting the cutting length of the vermicelli is provided on the side of the pressing component away from the conveying component, a driving component is connected to the bottom of the adjusting component, and a cutting component for cutting the vermicelli is provided on the end of the driving component.

[0006] Preferably: the conveying assembly includes a first motor, a conveying roller, and a resistance roller. The first motor is installed on one side of the workbench by bolts. The top surface of the workbench is provided with a rectangular groove located on one side of the first motor. One side of the inner side of the rectangular groove is rotatably connected to one end of the conveying roller through a bearing member. The other end of the conveying roller passes through the workbench and is fixedly connected to the output end of the first motor. Fixed frames located on both sides of the rectangular groove are welded on the top surface of the workbench. The adjacent sides of the fixed frames are connected to the resistance roller located above the conveying roller through a connecting assembly. A pressing assembly located on the top surface of the workbench is provided on one side of the resistance roller.

[0007] Preferably, the connecting component includes a moving block and a first threaded rod. Moving grooves are formed on the closer sides of the fixed frames. Moving blocks are slidably connected to the interiors of the moving grooves. The top surfaces of the moving blocks are rotatably connected to the first threaded rods through bearing seats. The other ends of the first threaded rods extend to the top surfaces of the fixed frames and are welded to rotating rods. Moreover, the first threaded rods and the interiors of the top surfaces of the fixed frames are rotationally connected through threads. The closer sides of the moving blocks are rotatably connected to the two ends of the rotating shafts of the pressing rollers located above the conveying rollers.

[0008] Preferably, the pressing component includes an electric push rod, a telescopic rod, a connecting plate, a spring and a pressing plate. Mounting seats are symmetrically welded on one side of the pressing roller and located on the top surface of the workbench. Electric push rods are installed at one ends of the tops of the mounting seats through bolts. Telescopic rods are welded on one sides of the electric push rods and located at the other ends of the tops of the mounting seats. The top surfaces of the movable ends of the telescopic rods and the electric push rods are fixedly installed at the four corners of the bottom of the connecting plate. A plurality of springs are welded to the bottom of the connecting plate at equal intervals. One ends of the springs away from the connecting plate are welded to the tops of the pressing plates. The adjusting component is located on the side of the pressing plate away from the pressing roller.

[0009] Preferably, the adjusting component includes a second motor, a second threaded rod, a sliding rod and a moving frame. Activity grooves are symmetrically formed on the top surface of the workbench on the side of the pressing plate away from the pressing roller. A second motor is installed on the side surface of the workbench and located on one side of one of the activity grooves. The interior of the activity groove is respectively provided with a second threaded rod and a sliding rod. One end of the second threaded rod is rotatably connected to one side of the inner wall of the activity groove. The other end of the second threaded rod penetrates through the workbench and is fixedly connected to the output end of the second motor through a rotating shaft. Both sides of the sliding rod are welded to the inner wall of the activity groove. A moving frame penetrating through the second threaded rod and the sliding rod is slidably connected to the interior of the activity groove. The moving frame is rotationally connected to the second threaded rod through threads and is slidably connected to the sliding rod. The top ends of the moving frames extend above the workbench and are welded to both ends of the bottom of the support plate. The middle of the bottom of the support plate is connected with a driving component.

[0010] Preferably, the driving component includes a double-output motor, a round rod, a rotating disc, a connecting rod and a support rod. A fixed seat is welded to the middle of the bottom of the support plate. A double-output motor is installed inside the fixed seat. The two ends of the output end of the double-output motor are fixedly connected with round rods. The ends of the round rods away from the double-output motor are welded with rotating discs. One end of a connecting rod is rotatably connected to the middle of the other side of the rotating disc through a pin. The other end of the connecting rod is rotatably connected to a support rod through a pin. The end of the support rod away from the connecting rod is connected with a cutting component.

[0011] Preferably: the cutting assembly includes a fixed rod, a cutting knife and a limit block, the end of the support rod away from the connecting rod is hingedly connected to the top of the fixed rod, the bottom ends of the fixed rod are welded to both sides of the top of the cutting knife, and both sides of the cutting knife close to the movable frame are welded with limit blocks, the sides of the movable frame are provided with through grooves matching the limit blocks, and one end of the limit blocks extends into the interior of the through groove and is slidably connected to the through groove.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. In the utility model, the vermicelli cutting device for food processing is provided with an adjusting component which can drive the cutting component to adjust the cutting position of the vermicelli through the driving component, so that equidistant cutting can be performed within the adjustment range according to the actual required size. The operation is simple, the practicality is increased, and the efficiency of vermicelli cutting is improved.

[0014] 2. In the utility model, the vermicelli cutting device for food processing is equipped with a pressing component to assist in pressing the vermicelli during cutting, thereby avoiding a large positional displacement due to the toughness and strength of the vermicelli itself during cutting, thereby affecting the accuracy of the cutting size, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0017] Figure 3 It is a top view of the overall structure of the utility model;

[0018] Figure 4 It is a side view of the overall structure of the utility model.

[0019] In the figure: 1, workbench; 8, supporting leg; 9, rectangular groove; 10, fixed frame; 11, movable groove; 12, mounting seat; 13, movable groove; 14, fixed seat; 15, through groove; 21, first motor; 22, conveying roller; 23, resistance roller; 31, moving block; 32, first threaded rod; 33, rotating rod; 41, electric push rod; 42, telescopic rod; 43, connecting plate; 44, spring; 45, pressing plate; 51, second motor; 52, second threaded rod; 53, sliding rod; 54, moving frame; 55, supporting plate; 61, dual output motor; 62, round rod; 63, rotating disk; 64, connecting rod; 65, supporting rod; 71, fixing rod; 72, cutting knife; 73, limiting block. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to Figures 1 to 4 , in the embodiment of the present utility model, a fan cutting device for food processing includes a workbench 1. Support legs 8 are welded to the four corners of the bottom surface of the workbench 1 to provide stable support for the workbench 1. A conveying assembly for conveying the fans for cutting is provided on one side of the top surface of the workbench 1. The conveying assembly includes a first motor 21, a conveying roller 22, and a resisting roller 23. A first motor 21 is installed on one side of the workbench 1 by bolts. A rectangular groove 9 is opened on the top surface of the workbench 1 on one side of the first motor 21. One end of the rotating shaft of the conveying roller 22 is rotatably connected to the inner side of the rectangular groove 9 through a bearing member. The other end of the rotating shaft of the conveying roller 22 penetrates the workbench 1 and is fixedly connected to the output end of the first motor 21. Fixed frames 10 are welded on the top surface of the workbench 1 on both sides of the rectangular groove 9. Resisting rollers 23 located above the conveying roller 22 are connected on the relatively close sides of the fixed frames 10 through connecting components.

[0022] The connecting component includes a moving block 31 and a first threaded rod 32. Moving grooves 11 are opened on the relatively close sides of the fixed frames 10. Moving blocks 31 are slidably connected to the interiors of the moving grooves 11. The top surfaces of the moving blocks 31 are rotatably connected to the first threaded rods 32 through bearing seats. The other ends of the first threaded rods 32 extend to the top surfaces of the fixed frames 10 and are welded with rotating rods 33. Moreover, the first threaded rods 32 and the interiors of the top surfaces of the fixed frames 10 are rotationally connected through threads. The two ends of the rotating shafts of the resisting rollers 23 located above the conveying roller 22 are rotatably connected to the relatively close sides of the moving blocks 31.

[0023] During use, the operator rotates the rotating rod 33 to make the first threaded rod 32 rotate and move toward the workbench 1. When the first threaded rod 32 rotates and moves, it drives the moving block 31 to slide and move inside the moving groove 11, so that the movement of the moving block 31 drives the resistance roller 23 to move toward the surface of the conveying roller 22. When the distance between the resistance roller 23 and the conveying roller 22 reaches a suitable thickness for passing vermicelli, the rotation of the rotating rod 33 can be stopped, and then the vermicelli to be cut is placed between the resistance roller 23 and the conveying roller 22, and the first motor 21 is started. The output end of the first motor 21 rotates and drives the conveying roller 22 to rotate, thereby driving the vermicelli to slide on the surface of the conveying roller 22. The movement of the vermicelli makes the resistance roller 23 rotate at the same time, and then the vermicelli to be cut is conveyed to the next step of operation. The operation is simple and can be suitable for conveying vermicelli of different thicknesses.

[0024] One side of the resistance roller 23 is provided with a pressing assembly located on the top surface of the workbench 1 for pressing when cutting vermicelli, and the pressing assembly includes an electric push rod 41, a telescopic rod 42, a connecting plate 43, a spring 44 and a pressing plate 45. One side of the resistance roller 23 is symmetrically welded with a mounting seat 12 located on the top surface of the workbench 1, and the electric push rod 41 is installed on one end of the top of the mounting seat 12 by bolts, and one side of the electric push rod 41 is welded with a telescopic rod 42 located on the other end of the top of the mounting seat 12, and the top surfaces of the movable ends of the telescopic rod 42 and the electric push rod 41 are fixedly mounted on the bottom four corners of the connecting plate 43, and a number of equidistantly distributed springs 44 are welded to the bottom of the connecting plate 43, and the end of the spring 44 away from the connecting plate 43 is welded to the top of the pressing plate 45.

[0025] During use, when the vermicelli is conveyed into the bottom of the pressing plate 45 through the conveying roller 22, the electric push rod 41 is started, and when the movable end of the electric push rod 41 retracts, the connecting plate 43 is driven to move downward. When the connecting plate 43 moves downward, the telescopic rod 42 is caused to contract accordingly. At the same time, the connecting plate 43 drives the pressing plate 45 to move toward the surface of the vermicelli through the spring 44 to press the vermicelli, thereby preventing the vermicelli from having a large positional displacement due to its own toughness and strength in subsequent cutting operations, thereby affecting the accuracy of the cutting size. The spring 44 can create space for movement between the pressing plate 45 and the surface of the vermicelli, so that the vermicelli will not be unable to be conveyed normally due to excessive pressing during the moving and conveying operations.

[0026] An adjusting component for adjusting the cutting length of vermicelli is provided on the side of the pressing plate 45 away from the abutting roller 23, and the adjusting component includes a second motor 51, a second threaded rod 52, a sliding rod 53 and a movable frame 54. A movable groove 13 is symmetrically provided on the top surface of the workbench 1, which is located on the side of the pressing plate 45 away from the abutting roller 23. A second motor 51 is installed on the side of the workbench 1, which is located on one side of the movable grooves 13. A second threaded rod 52 and a sliding rod 53 are respectively provided inside the movable grooves 13. One end of the second threaded rod 52 is rotatably connected to one side of the inner wall of the movable groove 13, and the other end of the second threaded rod 52 passes through the workbench 1 and is fixedly connected to the output end of the second motor 51 through a rotating shaft. Both sides of the sliding rod 53 are Welded on the inner wall of the movable groove 13, the movable groove 13 is internally slidably connected with a moving frame 54 that penetrates the second threaded rod 52 and the sliding rod 53. The moving frame 54 is rotatably connected to the second threaded rod 52 through threads and is slidably connected to the sliding rod 53. The top ends of the moving frame 54 extend to the top of the workbench 1 and are welded to the two ends at the bottom of the support plate 55. When in use, by starting the second motor 51, the output end of the second motor 51 rotates to drive the second threaded rod 52 to rotate accordingly. When the second threaded rod 52 rotates, the moving frame 54 threadedly connected to its surface is displaced in parallel, thereby driving the other moving frame 54 to slide on the surface of the sliding rod 53 through the support plate 55.

[0027] A driving assembly is connected to the middle of the bottom of the support plate 55, and the driving assembly includes a dual-output motor 61, a round rod 62, a rotating disk 63, a connecting rod 64 and a supporting rod 65. A fixing seat 14 is welded to the middle of the bottom of the support plate 55, and the dual-output motor 61 is installed inside the fixing seat 14. The output ends of both ends of the dual-output motor 61 are fixedly connected to the round rod 62, and the rotating disk 63 is welded to one end of the round rod 62 away from the dual-output motor 61. The middle of the other side of the rotating disk 63 is rotatably connected to one end of the connecting rod 64 through a pin, and the other end of the connecting rod 64 is rotatably connected to the supporting rod through a pin. 65, the end of the support rod 65 away from the connecting rod 64 is connected to a cutting assembly for cutting vermicelli, and the cutting assembly includes a fixed rod 71, a cutting knife 72 and a limit block 73. The end of the support rod 65 away from the connecting rod 64 is hingedly connected to the top of the fixed rod 71, and the bottom ends of the fixed rod 71 are welded to the two sides of the top of the cutting knife 72. The limiting blocks 73 are welded on both sides of the cutting knife 72 close to the movable frame 54. The sides of the movable frame 54 are provided with through grooves 15 matching the limit blocks 73, and one end of the limit blocks 73 extends to the inside of the through groove 15 and is slidably connected to the through groove 15.

[0028] When in use, the support plate 55 is driven to move in translation through the movable frame 54, thereby driving the cutting assembly to move in position through the driving assembly connected to the bottom of the support plate 55, so that the cutting position of the cutting knife 72 can be adjusted according to the actual length of the vermicelli to be cut. When the cutting position of the cutting knife 72 is adjusted, the dual-output motor 61 is started, and the output ends of the dual-output motor 61 rotate to drive the rotating disk 63 to rotate through the round rod 62. When the rotating disk 63 rotates, the connecting rod 64 is driven to rotate accordingly, thereby driving the fixed rod 71 to reciprocate up and down through the support rod 65. When the fixed rod 71 reciprocates up and down, the cutting knife 72 moves accordingly, and then cuts the vermicelli delivered. While the cutting knife 72 reciprocates up and down, the limit blocks 73 welded on both sides thereof slide and move inside the through groove 15, and the limit blocks 73 cooperate with the through groove 15 to limit the movement trajectory of the cutting knife 72 for up and down movement.

[0029] Working principle: When preparing to use the vermicelli cutting device for food processing, the operator first starts the second motor 51 to control the operation of the adjustment component according to the size of the vermicelli to be cut. Under the operation of the adjustment component, the driving component connected to the bottom of the support plate 55 drives the cutting component to move to the specified cutting position, and then rotates the rotating rod 33 so that the connecting component drives the contact roller 23 to move closer to the surface of the conveying roller 22. When the distance between the contact roller 23 and the conveying roller 22 reaches a suitable thickness for the vermicelli to pass, the first motor 21 is started to drive the conveying component to transport the vermicelli. When the vermicelli is transported to the bottom of the pressing component, the electric push rod 41 is started to drive the pressing component to operate, so that the pressing plate 45 presses the vermicelli, thereby avoiding a large positional offset of the vermicelli during subsequent cutting operations. At this time, the vermicelli is continued to be transported to the bottom of the cutting knife 72, and the dual-output motor 61 is started to control the operation of the driving component. The cutting component is driven by the driving component to reciprocate up and down, so that the cutting knife 72 cuts the vermicelli with equal intervals. The structure is simple and easy to use. There is no need for manual transportation and manual cutting of vermicelli, which reduces labor and improves the efficiency of vermicelli cutting.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vermicelli cutting device for food processing, comprising a workbench (1), wherein the bottom surface of the workbench (1) is welded with supporting legs (8) at four corners, characterized in that: A conveying assembly for conveying vermicelli for cutting is provided on one side of the top surface of the workbench (1); a pressing assembly for pressing the vermicelli when cutting is provided on one side of the conveying assembly, and an adjusting assembly for adjusting the cutting length of the vermicelli is provided on a side of the pressing assembly away from the conveying assembly; a driving assembly is connected to the bottom of the adjusting assembly, and a cutting assembly for cutting the vermicelli is provided at the end of the driving assembly; The conveying assembly comprises a first motor (21), a conveying roller (22), and a resisting roller (23); the first motor (21) is installed on one side of the workbench (1) by means of bolts; a rectangular groove (9) is provided on the top surface of the workbench (1) and is located on one side of the first motor (21); one side of the interior of the rectangular groove (9) is rotatably connected to a rotating shaft of one end of the conveying roller (22) through a bearing member; the other end of the rotating shaft of the conveying roller (22) passes through the workbench (1) and is fixedly connected to the output end of the first motor (21); a fixing frame (10) is welded on the top surface of the workbench (1) and is located on both sides of the rectangular groove (9); the adjacent sides of the fixing frame (10) are connected to a resisting roller (23) located above the conveying roller (22) by means of a connecting assembly; and a pressing assembly is provided on one side of the resisting roller (23) and is located on the top surface of the workbench (1); The pressing assembly comprises an electric push rod (41), a telescopic rod (42), a connecting plate (43), a spring (44) and a pressing plate (45); a mounting seat (12) located on the top surface of the workbench (1) is symmetrically welded to one side of the abutting roller (23); an electric push rod (41) is mounted on one end of the top of the mounting seat (12) by bolts; a telescopic rod (42) located on the other end of the top of the mounting seat (12) is welded to one side of the electric push rod (41); the top surfaces of the movable ends of the telescopic rod (42) and the electric push rod (41) are fixedly mounted on the four corners of the bottom of the connecting plate (43); a plurality of equidistantly distributed springs (44) are welded to the bottom of the connecting plate (43); the ends of the springs (44) away from the connecting plate (43) are welded to the top of the pressing plate (45); and the adjusting assembly is located on the side of the pressing plate (45) away from the abutting roller (23); The adjustment assembly comprises a second motor (51), a second threaded rod (52), a slide rod (53) and a movable frame (54); a top surface of the workbench (1) is symmetrically provided with a movable groove (13) located on the side of the pressing plate (45) away from the abutting roller (23); a second motor (51) is installed on the side of the workbench (1) and located on one side of the movable groove (13); a second threaded rod (52) and a slide rod (53) are respectively provided inside the movable groove (13); one end of the second threaded rod (52) is rotatably connected to one side of the inner wall of the movable groove (13); the other end of the second threaded rod (52) is rotatably connected to one side of the inner wall of the movable groove (13); The end of the slide rod (53) passes through the workbench (1) and is fixedly connected to the output end of the second motor (51) via a rotating shaft. Both sides of the slide rod (53) are welded to the inner wall of the movable groove (13). The interior of the movable groove (13) is slidably connected with a movable frame (54) that passes through the second threaded rod (52) and the slide rod (53). The movable frame (54) is rotatably connected to the second threaded rod (52) via a thread and is slidably connected to the slide rod (53). The top ends of the movable frame (54) extend above the workbench (1) and are welded to the two ends of the bottom of the support plate (55). The middle of the bottom of the support plate (55) is connected with a driving component.

2. A vermicelli cutting device for food processing according to claim 1, characterized in that: The connecting assembly comprises a moving block (31) and a first threaded rod (32); a moving groove (11) is provided on one side close to the fixed frame (10); the moving block (31) is slidably connected inside the moving groove (11); the top surface of the moving block (31) is rotatably connected to the first threaded rod (32) via a bearing seat; the other end of the first threaded rod (32) extends to the top surface of the fixed frame (10) and is welded with a rotating rod (33); the first threaded rod (32) is rotatably connected to the top surface of the fixed frame (10) via a thread; and the moving block (31) is rotatably connected to the rotating shafts at both ends of the abutting roller (23) located above the conveying roller (22) on one side close to the fixed frame (10).

3. A vermicelli cutting device for food processing according to claim 2, characterized in that: The driving assembly comprises a dual-output motor (61), a round rod (62), a rotating disk (63), a connecting rod (64) and a supporting rod (65); a fixing seat (14) is welded in the middle of the bottom of the supporting plate (55); the dual-output motor (61) is installed inside the fixing seat (14); both output ends of the dual-output motor (61) are fixedly connected to the round rod (62); one end of the round rod (62) away from the dual-output motor (61) is welded to the rotating disk (63); one end of the connecting rod (64) is rotatably connected to the middle of the other side of the rotating disk (63) via a pin; the other end of the connecting rod (64) is rotatably connected to the supporting rod (65) via a pin; and the end of the supporting rod (65) away from the connecting rod (64) is connected to the cutting assembly.

4. A vermicelli cutting device for food processing according to claim 3, characterized in that: The cutting assembly comprises a fixing rod (71), a cutting knife (72) and a limiting block (73); the end of the supporting rod (65) away from the connecting rod (64) is hingedly connected to the top of the fixing rod (71); the bottom ends of the fixing rod (71) are welded to the top two sides of the cutting knife (72); the limiting blocks (73) are welded to the two sides of the cutting knife (72) close to the movable frame (54); the sides of the movable frame (54) are provided with through grooves (15) matching the limiting blocks (73); one end of the limiting blocks (73) extends into the interior of the through groove (15) and is slidably connected to the through groove (15).