Automatic slicer for fish products

Abstract

The utility model discloses an automatic slicer for fish products, relates to the technical field of automatic processing equipment for the fish products, and aims to improve the automatic production efficiency of the fish products. The automatic slicing machine for the fish products comprises a fish feeding mechanism, a fish clamping device, a slicing mechanism and an electric control system, and the fish feeding mechanism is used for conveying the fish products to be processed to the fish clamping device and the slicing mechanism; the fish clamping device is used for fixing fish products and tidying fish fins; the slicing mechanism is used for separating bones and meat of fish products, and the electric control system is connected with the fish feeding mechanism, the fish clamping device and a driving mechanism of the slicing mechanism, so that the process automation of automatic feeding, automatic clamping and fin arrangement and automatic slicing is realized, the production efficiency is greatly improved, the labor intensity is reduced, and the production cost is reduced. The defects that original manual slicing is high in labor intensity and unstable in quality are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic processing equipment for fish products, in particular to a fish product slicing equipment. Background Art

[0002] In the industrial processing of fish products, filleting is the most important and labor-intensive process. Filleting, also known as slicing, is the process of separating the fish meat from the body of the fish. Due to the diversity of fish products and the irregularity of raw materials, manual filleting is still the main method. Manual filleting requires high technical skills from workers, who need long-term training to become proficient in the operation. In addition, due to the high labor intensity, the worker turnover rate is very high.

[0003] The technical requirements for processing pollock (also known as "wadfish") products are particularly high. Pollock has a middle bone in the middle and abdominal thorns on both sides of the belly. The two pieces of fish meat in the trunk of the pollock are separated by filleting, which does not have the middle bone and abdominal thorns. Therefore, the technical proficiency of the workers is required to be higher. The differences in processed products caused by individual differences among workers also increase the corresponding quality inspection pressure. The purpose of the utility model is to reduce the labor intensity of workers and improve the finished product rate and efficiency of fish product filleting. Utility Model Content

[0004] The utility model aims to provide an automatic filleting device for fish products, which can reduce the labor intensity of workers, improve the filleting efficiency of fish products, especially haddock, make the filleting quality of the machine automatic filleting the same as that of manual filleting, and improve the filleting finished product rate.

[0005] An embodiment of the utility model provides an automatic filleting machine for fish products, comprising a fish feeding mechanism, a fish clamping device, a filleting mechanism and an electric control system, wherein the fish feeding mechanism is used to transport the fish products to be processed to the fish clamping device and the filleting mechanism; the fish clamping device is used to fix the fish products and arrange the fins of the fish; the filleting mechanism is used to separate the bones and meat of the fish products, the electric control system is respectively connected to the driving mechanisms of the fish feeding mechanism, the fish clamping device and the filleting mechanism, the filleting mechanism is composed of four groups of tool assemblies, and the offset angle between the tools in the tool assemblies and the vertical center line is 1-5 degrees.

[0006] Furthermore, the fish delivery mechanism includes a trolley slide and a vertical plate, the vertical plate is arranged on the trolley slide, a hook-shaped protrusion is provided on the upper part of one vertical side of the vertical plate, and tooth tips are arranged at intervals on the top of the vertical plate. The tooth tips include forward pushing teeth pointing to the hook-shaped protrusion and anti-hooking teeth arranged in the last row and pointing in the opposite direction.

[0007] Optionally, sliding blocks are provided on both horizontal sides of the trolley slide, the sliding blocks are placed on a conveying track, and the lower part of the trolley slide is connected to a chain conveyor belt.

[0008] Furthermore, the fish-feeding mechanisms are arranged at equal intervals on the chain conveyor belt, and the number of the fish-feeding mechanisms is more than one.

[0009] On the other hand, the fish clamping device includes a fish supporting device, a fish hooking fin and a fish pressing device installed on a fish pressing bracket, and the fish supporting device, the fish hooking fin and the fish pressing device are respectively connected to the driving device through a rocker and a connecting rod.

[0010] Furthermore, the upper part of the fish hook fin is connected to the connecting rod of the fish clamping device, and the lower part has a hook-shaped protrusion bent forward.

[0011] On the other hand, the slicing mechanism includes a first knife assembly, a second knife assembly, a third knife assembly and a fourth knife assembly which are arranged in sequence. The first knife assembly is used to plane the belly of the fish from the bottom; the second knife assembly is used to plane the back of the fish from the top; the third knife assembly is used to remove the bones in the fish; and the fourth knife assembly is used to remove the thorns in the belly of the fish.

[0012] Furthermore, the knife assembly includes a motor and a knife blade installed on a knife holder, the knife blade is connected to the output shaft of the motor through a blade fixing seat, and the knife holder is also provided with a rocker to drive the knife blade to open and close.

[0013] Furthermore, the blades are two blades arranged opposite to each other, the upper parts of the two blades are close to each other, the lower parts of the blades are inclined outward, and the angle between the blades and the vertical center line is 1-3 degrees.

[0014] On the other hand, the two-knife assembly includes a motor and two-knife blades installed on a sliding guide rod. The two-knife blades are connected to the output shaft of the motor and move up and down through the sliding guide rod.

[0015] Furthermore, the two blades are two blades arranged opposite to each other, the lower parts of the two blades are close to each other, the upper parts of the blades are inclined outward, and the angle between the blades and the vertical center line is 1-3 degrees.

[0016] On the other hand, the three-knife assembly includes a motor and a three-knife blade installed on a support plate, and the motor and the three-knife blade are driven to move up and down through a three-knife tool holder.

[0017] Furthermore, the three-blade blade is two blades arranged opposite to each other, the lower parts of the two blades are close to each other, the upper parts of the blades are inclined outward, and the angle between the blades and the vertical center line is 1-3 degrees.

[0018] On the other hand, the four-knife assembly includes a fish flipping plate, a four-knife fixing plate, a knife opening connecting rod, a finger rod and a lower guide plate. The fish flipping plate is installed on the four-knife fixing plate. The angle between the fish flipping plates is 30 degrees, and the angle between the fish flipping plate and the vertical center line is 3-5 degrees.

[0019] Optionally, the motor is enclosed in a waterproof cover, one end of the motor shaft is sealed by an end cover, and the other end is connected to a blade fixing seat by a thread, and sealing rings are provided at both ends of the motor shaft.

[0020] The technical solution provided by the embodiment of the utility model, the offset angle design of the tool assembly provided for the slicing mechanism, combined with the automated movement arrangement of the fish feeding mechanism and the fish clamping device, utilizes the cam to drive the movement of the rocker arm, the rocker rod, etc., together realizes the automation of the fish product slicing process. Compared with the existing technical products, it greatly shortens the processing time, improves the yield rate, reduces the dependence on skilled technical workers, reduces the labor intensity of workers, and is of great significance to improving the production efficiency and economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the overall structure diagram of the automatic filleting machine for fish products of the utility model;

[0022] Figure 2 It is a schematic diagram of the fish feeding mechanism of the automatic filleting machine for fish products of the utility model;

[0023] Figure 3 It is a schematic diagram of a fish clamping device of the automatic filleting machine for fish products of the utility model;

[0024] Figure 4 It is a cross-sectional view of a knife assembly of the automatic filleting machine for fish products of the utility model;

[0025] Figure 5 It is a three-dimensional diagram of a knife assembly of the automatic filleting machine for fish products of the utility model;

[0026] Figure 6 It is a three-dimensional diagram of the two-knife assembly of the automatic filleting machine for fish products of the utility model;

[0027] Figure 7 This is a front view of the two-knife assembly of the automatic filleting machine for fish products of the utility model;

[0028] Figure 8 It is a three-dimensional diagram of the three-knife assembly of the automatic filleting machine for fish products of the utility model;

[0029] Fig. 9 It is a three-dimensional diagram of the four-knife assembly of the automatic filleting machine for fish products of the utility model.

[0030] In the figure: 1-touch screen; 2-raw material placement slot; 3-frame; 4-two-knife assembly; 5-three-knife assembly; 6-four-knife assembly; 7-one-knife assembly; 8-fish clamping device; 9-pedal; 10-sliding guide rod; 11-knife holder; 12-guide rod fixing seat; 13-motor; 14-two-knife blade; 15-fish clamp; 16-support plate; 17-knife holder fixing shaft; 18-three-knife holder; 19-fish dividing plate; 20-three-knife blade; 21-fish turning plate; 22-four-knife fixing Plate; 23-opening connecting rod; 24-finger rod; 25-lower guide plate; 26-single-knife blade; 27-blade fixing seat; 28-knife holder; 29-single-knife rocker; 30-fixing plate; 31-guide shaft; 32-fish supporting device; 33-fish pressing bracket; 34-fish clamping device rocker; 35-fish clamping device connecting rod; 36-fish supporting device; 37-fish hooking fin; 38-fish pressing device; 39-guide shaft sleeve; 40-tooth tip; 41-vertical plate; 42-trolley skateboard; 43-slider. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the structural diagrams and specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0032] like Figure 1As shown, the utility model provides an embodiment of an automatic filleting machine for fish products, which includes a raw material placement tank 2, a fish feeding mechanism, a fish clamping device 8, and a filleting mechanism composed of four sets of knives, namely, a first knife assembly 7, a second knife assembly 4, a third knife assembly 5, and a fourth knife assembly 6. All the mechanisms are integrated in a frame 3. Among them, the raw material placement trough 2 is used to temporarily store fish products ("raw materials") to be processed. It is arranged on one side of the conveying track, and an operator's workstation is arranged on the other side of the conveying track. The worker stands on the pedal 9 and takes the raw materials from the raw material placement trough 2. Such an arrangement is more ergonomically designed; the raw material placement trough 2 is composed of a baffle surrounded on three sides, and small holes are opened on the baffle to facilitate the discharge of ice water for thawing the raw materials; the fish products to be processed are placed in the raw material placement trough 2, and the operating workers load the raw materials on the fish feeding mechanism one by one; the fish feeding mechanism moves along the conveying track to the fish clamping device 8, fixes the fish, arranges the fish fins, and then passes through the one-knife assembly 7, the two-knife assembly 4, the three-knife assembly 5 and the four-knife assembly 6 of the slicing mechanism in turn to separate the fish bones and abdominal thorns from the fish body, and the finished fish body parts fall onto the conveyor belts on both sides of the rear part of the four-knife assembly 6 to enter the subsequent process. In the above operation process, only the installation of the raw material on the fish feeding mechanism is completed by manual operation, and the rest of the operations, such as the movement of the slicing mechanism, the movement of the conveyor belt, and the slicing of the fish, are automatically performed by setting the corresponding speed and movement sequence through the touch screen 1 set on the operation station, thereby greatly reducing the number of operators and improving work efficiency. The following is a description of each embodiment.

[0033] like Figure 2 As shown, the utility model provides an embodiment of a fish delivery mechanism. The fish delivery mechanism comprises a vertical plate 41 mounted on a trolley slide 42, the top of the vertical plate 41 is provided with spaced tapered protruding tooth tips 40, the tooth tips 40 are arranged in a plurality of rows of forward pushing teeth inclined from the rear of the top of the vertical plate 41 to the front protruding part of the vertical plate 41, and anti-hook teeth are arranged in the last row at the front of the vertical plate 41, the inclination direction of the tooth tips of the anti-hook teeth is opposite to the inclination direction of the tooth tips of the forward pushing teeth, and the anti-hook teeth are used to prevent the fish from escaping after being installed on the tooth tips 40 of the vertical plate 41; the upper part of the vertical plate 41 is in the shape of an acute triangle, and the direction of the acute angle is the same as the direction of the forward pushing teeth of the tooth tips 40. The opening of the raw fish is hung on the tooth tip 40. Since the upper part of the vertical plate 41 is in a shape that is acute-angled and gradually extends and expands toward the rear, the opening of the raw material is easily hung on the tooth tip 40. The inclination direction of the anti-hooking teeth of the tooth tip 40 is opposite to the direction in which the raw material is hung, which can prevent the raw material from falling off.

[0034] On the other hand, the two ends of the trolley slide 42 in the horizontal direction are connected with the slider 43, and the slider 43 is placed on the conveying track and moves in the direction of the sliding track. The fish delivery mechanism is arranged as several mechanisms at intervals, and the interval distance needs to be set in combination with the conveyor belt running speed and the worker's operation time. The fish delivery mechanism of the present embodiment is set to 6, which are arranged on the conveyor belt at equal intervals, and the lower part of the fish delivery mechanism is connected to the conveyor belt. The conveyor belt is a circulating conveying structure composed of a sprocket driven chain, and the sprocket is connected to a driving motor, and the driving motor is connected to an electric control system, and the motor speed and starting action are set by the electric control system. The slider 43 of the fish delivery mechanism slides along the fixed track set by the conveying track, thereby ensuring that the motion trajectory of the fish delivery mechanism is stable. The driving motor drives the sprocket, and then drives the chain to move, and the chain movement drives the fish delivery mechanism arranged thereon to move along the conveying track, thereby bringing the fish into the fish clamping device 8.

[0035] like Figure 3 As shown, the utility model provides an embodiment of a fish clamping device. The fish clamping device 8 includes a fish pressing bracket 33, and the fish pressing bracket 33 is fixed to the frame 3 through a guide sleeve 39; a fish clamping device rocker 34 is provided at the lower part of the fish pressing bracket 33, and one end of the fish clamping device rocker 34 and a fish clamping device connecting rod 35 are connected to the same crank shaft, and the other end of the fish clamping device connecting rod 35 is connected to a hooking fin 37, and the fish clamping device rocker 34 swings, driving the crank shaft to rotate, thereby driving the fish clamping device connecting rod 35 to move linearly, and then driving the hooking fin 37 to move, so as to lift the fish fin;

[0036] The front end of the hooking fin 37 is made of sheet metal bent into an upwardly angled shape, which is convenient for hooking the fish fin. The front part of the hooking fin 37 is provided with a fish supporting device 36, and the rear part is provided with a fish pressing device 38; the lower part of the fish supporting device 36 is provided with an arc groove adapted to the shape of the fish body, the fish supporting device 36 is connected to the crank shaft of the fish pressing bracket 33 through a connecting rod, the middle part of the fish pressing device 38 is connected to the side pull rod, the pull rod is connected to the crank shaft, and the upper part of the fish pressing device 38 is connected to another pull rod through a U-shaped handle, and the pull rod is connected to another shaft in the fish pressing bracket 33, so that the fish pressing device 38 is driven by the movement of the connecting rod to realize lifting and pressing around the center point, as well as complex movements such as linear motion. When the raw material is sent to the lower part of the fish pressing bracket 33 by the fish feeding mechanism, the rocker and the connecting rod move in sequence, driving the fish supporting device 36 to straighten the fish body, and the fish fin hook 37 to hook the fish fins and straighten them to prevent the subsequent knife from cutting the fish fins, and the fish pressing device 38 presses the raw material, thereby fixing the position and posture of the fish so as to enter the slicing process.

[0037] like Figure 4 and Figure 5As shown, the utility model provides an embodiment of a one-knife assembly. The one-knife assembly 7 is located at the front of the conveying track, below the side of the two-knife assembly 4, and includes two motors 13 installed on the knife holder 28 and arranged opposite to each other. The motor 13 is sealed in a waterproof motor housing, the middle of the motor is set to be hollow, and the motor shaft passes through the hollow. One end of the motor housing is provided with a sealed end cover, and the other end is connected to the blade fixing seat 27, and the blade fixing seat 27 is threadedly connected to the motor shaft; the motor shaft of the motor 13 is supported by bearings at both ends, and a compression spring is installed on the motor shaft. The shaft end is connected to the blade fixing seat 27, and a knife blade 26 is fixed on the blade fixing seat 27. The two ends of the motor shaft are sealed with sealing rings, and the motor 13 is sealed in the waterproof motor housing, which can prevent the liquid of the cleaning system from entering the motor and causing accidents; on the other hand, the compression spring arranged on the motor shaft of the motor 13 shrinks under the thrust of the blade fixing seat 27, and the spring returns to its original state when the blade fixing seat 27 retreats, thereby ensuring that the one-knife blade 26 completes the opening and closing movement smoothly.

[0038] In addition, the knife assembly 7 also includes a knife blade 26 and a blade fixing seat 27 arranged relatively, and a rocker 29 is arranged below the knife holder 28. The movement of the rocker 29 drives the knife holder 28 to tilt, so that the relatively arranged knife blade 26 forms a blade tilt angle with a sharp top and a wide bottom, wherein the tilt angle between the knife blade 26 and the vertical center line is between 1-3 degrees. The effect of the blade offset is because the fish fin is wide, and the teeth extending inward are thin. The offset setting is convenient for planing the belly of the fish, and the yield rate is improved; the motor 13 drives the motor shaft to rotate, and then drives the knife blade 26 to rotate through the blade fixing seat 27. Since there is an inclined angle between the knife blade 26 and the vertical center line, during the rotation of the knife blade 26, the tip formed by the knife blade 26 approaching each other cuts the belly of the fish. As the rotation continues, the knife blade 26 gradually expands the belly of the fish, and finally the belly of the fish is completely cut open. That is to say, the rocker 29 drives the knife blade 26 to open and close to cut the belly of the fish. A fish supporting device 32 is also provided beside the knife blade 26 to support the fish. A knife assembly 7 is fixed on the frame 3 by a fixing plate 30.

[0039] like Figure 6 and Figure 7As shown, the utility model provides an embodiment of a two-knife assembly. The two-knife assembly 4 includes two motors 13 arranged opposite to each other and two blades 14 connected to the motor shafts. The motor 13 is fixed on a knife holder 11, and the knife holder 11 is connected to a sliding guide rod 10, so that the motor 13 can move up and down in a vertical direction. A fish clamp 15 is also arranged in front of the blade 14. In this embodiment, the angle between the two knife blades 14 and the center line is 1-3 degrees, that is, the motor 13 is not arranged horizontally, but forms an angle of 1-3 degrees with the horizontal line, so that the two blades 14 form an acute downward angle, the lower part contacts the raw material, and the upper part is inclined upward, forming an inverted triangle shape with a narrow lower part and a wide upper part. When the fish is driven by the fish feeding mechanism and passes through the second knife assembly 4, the sliding guide rod 10 drives the knife holder 11 to descend, the fish clamp 15 clamps the fish body, and the motor 13 drives the second knife blade 14 to rotate to cut the back of the fish. Subsequently, the sliding guide rod 10 drives the knife holder 11 to rise, and the fish clamp 15 is relaxed at the same time. The fish is driven by the fish feeding mechanism to continue to move to the third knife assembly 5 for the third step of processing.

[0040] like Figure 8 As shown, the utility model provides an embodiment of a three-knife assembly. The three-knife assembly 5 is arranged at the rear of the two-knife assembly, and includes two motors 13 and three-knife blades 20 arranged opposite to each other. A fish-splitting plate 19 is arranged inside the three-knife blades 20. The three-knife blades 20 and the fish-splitting plate 19 are mounted on the output shaft of the motor 13, and the output shaft is connected to the three-knife tool holder 18. The other end of the three-knife tool holder 18 is mounted on the support plate 16 through the tool holder fixing shaft 17, and the support plate is connected to the frame 3. The three-knife blade 20 is also offset, and the angle between it and the vertical center line is 1-3 degrees. When the fish is transported to the three-knife assembly 5 by the fish delivery mechanism, the three-knife tool holder 18 swings downward, driving the three-knife blade 20 to contact the fish, and the output shaft of the motor 13 rotates to drive the three-knife blade 20 to rotate, planing the fish middle bone, and the fish-splitting plate 19 rotates with the output shaft to insert into the gap between the middle bone and the fish body, separating the middle bone from the fish body, and the fish body continues to move to the four-knife assembly 6 with the fish delivery mechanism.

[0041] The above-mentioned one-knife assembly 7, two-knife assembly 4, and three-knife assembly 5 are all driven by the cam set on the frame 3 to drive their respective connecting rods and rockers to move up and down or open and close the knife. The cam is connected to the output shaft of the motor through a chain, and the motor is connected to the electronic control system. The operator can start and control the movement of the motor through the touch screen 1, thereby driving the movement of the knife.

[0042] The above-mentioned cutting mechanism is also provided with a liquid cleaning system, which uses cooling water to cool the blade and clean the system.

[0043] like Fig. 9As shown, the utility model provides an embodiment of a four-knife assembly. The four-knife assembly 6 is arranged at the rear of the three-knife assembly 5, and includes a fish turning plate 21, a knife connecting rod 23, a lower guide plate 25, a finger rod 24, and a four-knife fixing plate 22, wherein the fish turning plate 21 is fixed on the four-knife fixing plate 22, the angle between the two fish turning plates 21 is 30 degrees, and the angle between each fish turning plate 21 and the vertical line is 3-5 degrees. Such an offset angle design is conducive to the removal of fish abdominal thorns and the separation of fish meat. When the fish is transported to the four-knife assembly 6 by the fish feeding structure, the fish moves on the top of the lower guide plate 25 and enters the finger rod 24, the fish abdominal thorns are removed, and the fish meat is separated by the fish turning plate 21 and enters the conveyor belts on both sides below, thereby entering the next process.

[0044] The utility model realizes the automation of the fish filleting process by setting the tool angle of the filleting mechanism, combining the automated design of the fish feeding mechanism and the fish clamping device, and controlling the coordinated operation of each mechanism through an electric control system, thereby improving the output rate, reducing the labor intensity of workers, and having important significance for improving the production efficiency and economic benefits of an enterprise.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An automatic filleting machine for fish products, comprising a fish feeding mechanism, a fish clamping device, a filleting mechanism and an electric control system, wherein: The fish feeding mechanism is used to transport the fish products to be processed to the fish clamping device and the slicing mechanism; the fish clamping device is used to fix the fish products and arrange the fish fins; the slicing mechanism is used to separate the bones and meat of the fish products, and the electric control system is respectively connected to the driving mechanisms of the fish feeding mechanism, the fish clamping device and the slicing mechanism, and is characterized in that the slicing mechanism is composed of four groups of tool assemblies, and the offset angle between the tools in the tool assemblies and the vertical center line is 1-5 degrees.

2. The automatic filleting machine for fish products according to claim 1, characterized in that: The fish delivery mechanism comprises a trolley slide plate (42) and a vertical plate (41), wherein the vertical plate (41) is arranged on the trolley slide plate (42), a hook-shaped protrusion is arranged on the upper part of a vertical side edge of the vertical plate (41), and tooth tips (40) are arranged at intervals on the top of the vertical plate (41), wherein the tooth tips (40) comprise forward pushing teeth pointing to the hook-shaped protrusion and anti-hooking teeth arranged in the last row and pointing in the opposite direction.

3. The automatic filleting machine for fish products according to claim 2, characterized in that: Slide blocks (43) are arranged on both horizontal sides of the trolley slide block (42), and the slide blocks (43) are placed on a conveying track. The lower part of the trolley slide block (42) is connected to a chain conveyor belt.

4. The automatic filleting machine for fish products according to claim 3, characterized in that: The fish-feeding mechanisms are arranged on the chain conveyor belt at equal intervals, and the number of the fish-feeding mechanisms is more than one.

5. The automatic filleting machine for fish products according to claim 1, characterized in that: The fish clamping device comprises a fish supporting device (36), a fish hooking fin (37) and a fish pressing device (38) which are installed on a fish pressing bracket (33); the fish supporting device (36), the fish hooking fin (37) and the fish pressing device (38) are respectively connected to a driving device through a rocker and a connecting rod.

6. The automatic filleting machine for fish products according to claim 5, characterized in that: The upper part of the fish hook fin (37) is connected to the fish clamping device connecting rod (35), and the lower part has a hook-shaped protrusion bent forward.

7. The automatic filleting machine for fish products according to claim 1, characterized in that: The slicing mechanism comprises a first knife assembly (7), a second knife assembly (4), a third knife assembly (5) and a fourth knife assembly (6) which are arranged in sequence, wherein the first knife assembly (7) is used for slicing the belly of the fish from the bottom; the second knife assembly (4) is used for slicing the back of the fish from the top; the third knife assembly (5) is used for removing bones from the fish; and the fourth knife assembly (6) is used for removing bones from the belly of the fish.

8. The automatic filleting machine for fish products according to claim 7, characterized in that: The single-knife assembly (7) comprises a motor (13) and a single-knife blade (26) mounted on a knife holder (28); the single-knife blade (26) is connected to an output shaft of the motor (13) via a blade fixing seat (27); the knife holder (28) is also provided with a rocker (29) for driving the single-knife blade (26) to move in an opening and closing manner.

9. The automatic filleting machine for fish products according to claim 8, characterized in that: The blade (26) is composed of two blades arranged opposite to each other, the upper parts of the two blades are close to each other, the lower parts of the blades are inclined outwards, and the angle between the blades and the vertical center line is 1-3 degrees.

10. The automatic filleting machine for fish products according to claim 7, characterized in that: The two-knife assembly (4) comprises a motor (13) and a two-knife blade (14) mounted on a sliding guide rod (10); the two-knife blade (14) is connected to the output shaft of the motor (13) and moves up and down through the sliding guide rod (10).

11. The automatic filleting machine for fish products according to claim 10, characterized in that: The two blades (14) are two blades arranged opposite to each other, the lower parts of the two blades are close to each other, the upper parts of the blades are inclined outwards, and the angle between the blades and the vertical center line is 1-3 degrees.

12. The automatic filleting machine for fish products according to claim 7, characterized in that: The three-knife assembly (5) comprises a motor (13) and a three-knife blade (20) mounted on a support plate (16); the motor (13) and the three-knife blade (20) are driven to move up and down by a three-knife holder (18).

13. The automatic filleting machine for fish products according to claim 12, characterized in that: The three-blade blade (20) is composed of two blades arranged opposite to each other, the lower parts of the two blades are close to each other, the upper parts of the blades are inclined outwards, and the angle between the blades and the vertical center line is 1-3 degrees.

14. The automatic filleting machine for fish products according to claim 7, characterized in that: The four-knife assembly (6) comprises a fish turning plate (21), a four-knife fixing plate (22), a knife opening connecting rod (23), a finger rod (24) and a lower guide plate (25); the fish turning plate (21) is installed on the four-knife fixing plate (22); the angle between the fish turning plates (21) is 30 degrees, and the angle between the fish turning plates (21) and the vertical center line is 3-5 degrees.

15. The automatic filleting machine for fish products according to claim 8, 10 or 12, characterized in that: The motor (13) is enclosed in a waterproof cover, one end of the motor (13) shaft is sealed by an end cover, and the other end is connected to a blade fixing seat via a thread, and sealing rings are provided at both ends of the motor shaft.

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