Limiting mechanism for automatic chicken leg cutting machine

Abstract

The utility model relates to the technical field of poultry slitting devices, in particular to a limiting mechanism for an automatic chicken leg cutting machine. Comprising a chain plate installed on a conveying chain of the automatic chicken leg cutting machine, a holding roller hinged to one side of the chain plate and a holding clamp hinged to the other side of the chain plate, a holding roller shaft base and a holding clamp shaft base are arranged on the upper surface of the chain plate, the holding roller is hinged to the holding roller shaft base through a holding roller shaft, and the holding clamp is hinged to the holding clamp shaft base through a holding clamp shaft. A pair of holding roller permanent magnets with the same poles opposite is arranged between the holding roller and the chain plate, and a pair of holding clamp permanent magnets with the same poles opposite is arranged between the holding clamp and the chain plate. The limiting mechanism utilizes repulsive force of the permanent magnet to return the holding roller and the holding clamp, thoroughly gets rid of faults caused by mechanical fatigue of a reset spring, and is simple in structure, high in reliability and low in fault rate.

Description

Technical Field

[0001] The utility model relates to the technical field of poultry cutting devices, in particular to a limiting mechanism for an automatic chicken leg cutting machine. Background Technique

[0002] In food work, whole poultry usually needs to be cut into different parts for sale, such as legs, wings, and breast meat. This cutting operation is usually completed by an automatic cutting production line. The thighs of broiler chickens usually need to be skinned. There is a significant price difference between the leg skin and the lower legs. Usually, the price of the lower legs is more than twice that of the leg skin. In order to achieve more refined sales, chicken legs usually also need to be cut into thighs and lower legs for separate sale. Existing automatic chicken leg cutting machines usually hang the whole chicken leg on a hook with the lower leg facing up and the thigh facing down, and use a fixing mechanism to limit the position of the leg. Then, a cutter is aligned with the connection part between the thigh and the lower leg for cutting. Chinese Patent 2023218362891 discloses "A Poultry Thigh and Lower Leg Cutting Device", and the publication number is CN220211705U. This cutting device includes: a leg conveying mechanism for conveying poultry legs; a leg limiting mechanism disposed below the leg conveying mechanism for limiting the position of poultry legs to prevent the poultry legs from rotating. Among them, the leg limiting mechanism includes a limiting piece conveyor belt disposed below the leg conveying mechanism, limiting pieces disposed on both sides of the limiting piece conveyor belt and rotatably connected to the limiting piece conveyor belt, and limiting guide rods disposed outside the limiting pieces for restricting the opening and closing of the limiting pieces. The limiting pieces are connected to the limiting piece conveyor belt through fixing seats, and the limiting pieces are rotatably connected to the fixing seats. The limiting pieces are connected to the fixing seats through connecting plates, a return spring is disposed between the connecting plates and the fixing seats, and a limiting portion is disposed at the upper end of the connecting plate. The limiting mechanism of this chicken leg cutting machine controls the closing of the limiting pieces by the limiting guide rods and controls the opening of the limiting pieces by the return spring. However, due to the inevitable mechanical fatigue of the return spring during operation, and the very large workload of chicken leg cutting, the service life of the return spring is short, resulting in a high failure rate of the limiting mechanism and affecting the stability of the equipment. Content of the Utility Model

[0003] The purpose of the utility model is to provide a limiting mechanism for an automatic chicken leg cutting machine with a simple structure, high reliability, and low failure rate, completely getting rid of the failures caused by the mechanical fatigue of the return spring.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The limiting mechanism for an automatic chicken leg splitting machine described in this utility model includes a chain plate installed on the transmission chain of the automatic chicken leg splitting machine, a holding roller hinged on one side of the chain plate, and a holding clip hinged on the other side of the chain plate. A holding roller shaft seat and a holding clip shaft seat are provided on the upper surface of the chain plate. The holding roller is hinged on the holding roller shaft seat through a holding roller shaft, and the holding clip is hinged on the holding clip shaft seat through a holding clip shaft. A pair of holding roller permanent magnets with the same poles facing each other are arranged between the holding roller and the chain plate, and a pair of holding clip permanent magnets with the same poles facing each other are arranged between the holding clip and the chain plate.

[0006] With this solution, the permanent magnets with the same poles facing each other can push the holding roller and the holding clip apart, keeping the limiting mechanism in an open state. Since no springs are used, the structure is further simplified and the faults caused by the mechanical fatigue of the return springs can be completely eliminated.

[0007] Preferably, a holding roller linkage block is fixedly installed on the holding roller shaft, and a holding clip linkage block is fixedly installed on the holding clip shaft; the holding roller permanent magnet includes a holding roller moving magnet embedded in the holding roller linkage block and a holding roller static magnet embedded in the chain plate at a position corresponding to the holding roller moving magnet; the holding clip permanent magnet includes a holding clip moving magnet embedded in the holding clip linkage block and a holding clip static magnet embedded in the chain plate at a position corresponding to the holding clip moving magnet.

[0008] With this solution, the repulsive force of the permanent magnets with the same poles can push the holding roller and the holding clip apart.

[0009] Preferably, the holding roller includes a holding roller swing arm hinged on the chain plate, a holding roller rod fixedly connected to the holding roller swing arm, and a holding roller disc fixedly connected to the holding roller rod. The holding roller discs are arranged in pairs at intervals.

[0010] With this solution, the holding roller and the holding clip can be used in cooperation to clamp the chicken leg.

[0011] Preferably, the holding clip includes a holding clip swing arm hinged on the chain plate and a holding clip claw fixedly connected to the holding clip swing arm.

[0012] With this solution, the holding clip claw and the holding roller can be used in cooperation to clamp the chicken leg.

[0013] Preferably, pulleys are installed on the outer sides of both the holding roller and the holding clip.

[0014] With this solution, the limiting rods arranged on the outer sides of the holding roller and the holding clip can push the holding roller and the holding clip together to clamp the chicken leg, and the pulleys can reduce the sliding friction.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The limiting mechanism uses the repulsive force of the permanent magnets to return the holding roller and the holding clip, completely eliminating the faults caused by the mechanical fatigue of the return springs. Its structure is simple, reliable, and has a low failure rate. Description of the Drawings

[0016] Figure 1 Schematic three - dimensional structure diagram of an embodiment of the present utility model.

[0017] Figure 2 Schematic three - dimensional structure diagram of the holding roller and the chain plate.

[0018] Figure 3 Schematic three - dimensional structure diagram of the clamping jaw and the chain plate. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0020] As Figure 1 shown, the limiting mechanism for the automatic chicken leg cutting machine of the present utility model includes a chain plate 1 installed on the transmission chain of the automatic chicken leg cutting machine, a holding roller 2 hinged on one side of the chain plate 1, and a clamping jaw 3 hinged on the other side of the chain plate 1. When the automatic chicken leg cutting machine works, the transmission chain drives the chain plate 1 to operate. Limiting rods are arranged on both sides of the transmission chain, and these limiting rods are used to limit the positions of the holding roller 2 and the clamping jaw 3. At the front end of the movement trajectory, the interval between the two limiting rods is relatively large, so that the holding roller 2 and the clamping jaw 3 can smoothly slide into the space between the two limiting rods. As the chain plate 1 moves, the distance between the limiting rods on both sides gradually decreases. The limiting rods close the holding roller 2 and the clamping jaw 3 to clamp the chicken leg for the cutting knife to cut the chicken leg. After cutting is completed, at the end of the limiting rods, the holding roller 2 and the clamping jaw 3 lose the supporting force of the limiting rods and reopen to release the cut chicken leg.

[0021] A holding roller shaft seat 4 and a clamping jaw shaft seat 5 are arranged on the upper surface of the chain plate 1. The axes of the holding roller shaft seat 4 and the clamping jaw shaft seat 5 are parallel to each other and are both parallel to the movement trajectory of the chain plate 1. The holding roller 2 is hinged on the holding roller shaft seat 4 through a holding roller shaft, and the clamping jaw 3 is hinged on the clamping jaw shaft seat 5 through a clamping jaw shaft. When the holding roller 2 and the clamping jaw 3 hinge and move inward, the clamping action on the chicken leg is realized, and vice versa, the chicken leg can be released. A pair of holding roller permanent magnets with the same poles facing each other are arranged between the holding roller 2 and the chain plate 1, and a pair of clamping jaw permanent magnets with the same poles facing each other are arranged between the clamping jaw 3 and the chain plate 1.

[0022] As Figure 1 、 Figure 2As shown in the figure, a roller clamping linkage block 41 is fixedly installed on the roller shaft. The roller clamping linkage block 41 is a columnar structure with a triangular cross-section. The roller clamping linkage block 41 is fixedly connected to the middle position of the roller shaft and can rotate with the roller shaft. Both ends of the roller shaft are rotatably supported on the roller shaft seat 4 through bearings or sliding sleeves. The roller 2 is fixedly connected to the roller shaft. A clamp shaft clamping linkage block 51 is fixedly installed on the clamp shaft. The clamp shaft clamping linkage block 51 is a columnar structure with a triangular cross-section and is fixedly connected to the middle position of the clamp shaft to rotate with the clamp shaft. Both ends of the clamp shaft are rotatably supported on the clamp shaft seat 5 through bearings or sliding sleeves. The roller permanent magnet includes a roller moving magnet 43 embedded in the roller clamping linkage block 41 and a roller static magnet 42 embedded in the chain plate 1 corresponding to the position of the roller moving magnet. The clamp permanent magnet includes a clamp moving magnet 52 embedded in the clamp shaft clamping linkage block 51 and a clamp static magnet 53 embedded in the chain plate 1 corresponding to the position of the clamp moving magnet 52. After installation, the same poles of the roller moving magnet 43 and the roller static magnet 42 face each other, and the roller static magnet 42 generates a repulsive force on the roller clamping linkage block 41. The same poles of the clamp moving magnet 52 and the clamp static magnet 53 face each other, and the clamp static magnet 53 generates a repulsive force on the clamp shaft clamping linkage block 51. Of course, in order to enable the repulsive force of the permanent magnet to push the roller clamping linkage block 41 or the clamp shaft clamping linkage block 51 to deflect, the installation positions of the roller permanent magnet and the clamp permanent magnet should deviate from the projections of the roller shaft or the clamp shaft on the chain plate 1. In this embodiment, the permanent magnet is installed inside the roller shaft seat 4 and the clamp shaft seat 5. The repulsive force generated by the permanent magnet can push the roller clamping linkage block 41 or the clamp shaft clamping linkage block 51 to deflect outward, and at the same time drive the roller 2 or the clamp 3 to deflect outward.

[0023] In addition, in order to avoid the interference of magnetic conductive materials on the permanent magnet, the roller shaft, the clamp shaft, the roller clamping linkage block 41 and the clamp shaft clamping linkage block 51 are all made of food-grade engineering plastics or stainless steel materials.

[0024] As Figure 2 shown in the figure, the roller 2 includes a roller swing arm 21 hinged on the chain plate 1, a roller swing arm 21 fixedly connected to the roller swing arm 21, and a roller disc 23 fixedly connected to the roller rod 22. The lower end of the roller swing arm 21 is fixedly connected to the roller shaft. The two roller swing arms 21 are respectively located at both ends of the roller clamping linkage block 41. The upper end of the roller swing arm 21 is fixedly connected to the roller rod 22 and the roller disc 23. The roller discs 23 are arranged at intervals in pairs, and each pair of roller discs 23 forms a roller mechanism for clamping the chicken leg.

[0025] As Figure 3As shown, the clamping device 3 includes a clamping swing arm 31 hinged to the chain plate 1 and a clamping claw 32 fixedly connected to the clamping swing arm 31. The lower end of the clamping swing arm 31 is fixedly connected to a clamping shaft, and the two clamping swing arms 31 are respectively located at both ends of the clamping linkage block 51. The clamping claw 32 includes a claw plate 33 fixedly connected to the clamping swing arm 31 and a claw head 34 fixedly connected to the claw plate 33. The claw head 34 is a plate-like structure perpendicular to the claw plate 33, and a U-shaped clamping opening is provided on the claw head 34 for clamping on the outer side surface of the chicken leg when the holding roller 2 and the clamping device 3 are closed to fix the chicken leg.

[0026] In addition, in order to reduce the friction with the limiting rod, pulleys 6 are installed on the outer side surfaces of the holding roller 2 and the clamping device 3. When the chain plate 1 drives the holding roller 2 and the clamping device 3 to move between the two limiting rods, the holding roller 2 or the clamping device 3 slides on the limiting rod by relying on the pulley 6. The distance between the two limiting rods gradually decreases, and the limiting rod squeezes the holding roller 2 or the clamping device 3 from the outside to the inside, so that the distance between the holding roller 2 and the clamping device 3 decreases until the chicken leg is completely clamped. During this process, the cutting knife completes the cutting of the chicken leg. At the rear end of the limiting rod, the distance between the two limiting rods gradually increases, and the holding roller 2 and the clamping device 3 lose the support of the limiting rod and turn outward respectively under the action of the repulsive force of the permanent magnet to release the chicken leg.

[0027] The content not detailedly described in this specification belongs to the prior art well-known to those skilled in the art.

[0028] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A limiting mechanism for an automatic chicken leg splitting machine, comprising a chain plate (1) mounted on a conveying chain of the automatic chicken leg splitting machine, a holding roller (2) hinged on one side of the chain plate (1), and a holding clamp (3) hinged on the other side of the chain plate (1), characterized in that: The upper surface of the chain plate (1) is provided with a roller holding shaft seat (4) and a clamping shaft seat (5); the roller (2) is hinged on the roller holding shaft seat (4) via a roller holding shaft; the clamp (3) is hinged on the clamping shaft seat (5) via a clamping shaft; a pair of roller holding permanent magnets with the same polarity facing each other are provided between the roller (2) and the chain plate (1); and a pair of clamping permanent magnets with the same polarity facing each other are provided between the clamp (3) and the chain plate (1).

2. The limiting mechanism for the automatic chicken leg splitting machine according to claim 1 is characterized in that: A roller holding linkage block (41) is fixedly mounted on the roller holding shaft, and a clamping linkage block (51) is fixedly mounted on the clamping shaft; the roller holding permanent magnet comprises a roller holding moving magnet (43) embedded in the roller holding linkage block (41), and a roller holding static magnet (42) embedded in the chain plate (1) corresponding to the position of the roller holding moving magnet; the clamping permanent magnet comprises a clamping moving magnet (52) embedded in the clamping linkage block (51), and a clamping static magnet (53) embedded in the chain plate (1) corresponding to the position of the clamping moving magnet (52).

3. The limiting mechanism for the automatic chicken leg splitting machine according to claim 1 or 2, characterized in that: The holding roller (2) comprises a holding roller swing arm (21) hinged on the chain plate (1), a holding roller rod (22) fixedly connected to the holding roller swing arm (21), and a holding roller disc (23) fixedly connected to the holding roller rod (22), wherein the holding roller discs (23) are arranged in groups of two at intervals.

4. The limiting mechanism for the automatic chicken leg splitting machine according to claim 1 or 2, characterized in that: The clamp (3) comprises a clamp swing arm (31) hinged on the chain plate (1), a clamp claw (32) fixedly connected to the clamp swing arm (31), and the clamp claw (32).

5. The limiting mechanism for the automatic chicken leg splitting machine according to claim 1 or 2, characterized in that: The outer sides of the holding roller (2) and the holding clamp (3) are both equipped with pulleys (6).

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