A poultry leg pre-cutting device that can improve cutting quality

Abstract

This invention relates to a poultry leg pre-cutting device that improves cutting quality, comprising: a frame, a first conveying device, a cutting assembly, a first positioning frame, and a bending drive mechanism. The first conveying device and the cutting assembly are respectively mounted on the frame. The first positioning frame includes a first frame body and a lower support plate. The first conveying device drives the first frame body to move. The lower support plate is located above the first frame body and is movably connected to it. The bending drive mechanism drives the lower support plate to move vertically relative to the first frame body before passing the cutting assembly. After the chicken leg contacts the first and second positioning frames respectively, the vertical movement of the lower support plate drives the chicken leg to rotate and move up and down, ensuring that the chicken leg contacts the various positioning components. This ensures accurate cutting by the subsequent cutting assembly, solving the problem of poor consistency in chicken products produced in factories.

Description

Technical Field

[0001] This invention relates to the field of poultry processing, and in particular to a poultry leg pre-cutting device that can improve the quality of processing. Background Technology

[0002] When poultry are processed on an assembly line, fixed hooks (such as those in the patent with authorization announcement number CN219679639U) are connected to the legs of the poultry. The fixed hooks move along the assembly line, thereby driving the movement of the poultry. Before the processing of the thighs and lower legs, the torso of the poultry has already been separated, and only the chicken legs are hooked on the fixed hooks.

[0003] Current processing methods require separating chicken legs into thighs and calves (knuckles). Currently, a cutting tool is used to directly cut the knee cartilage between the thigh and calf, thus separating the thigh and calf. However, the current cutting device separates the thigh and calf without separating the knee cartilage, preventing it from being cut off separately and thus reducing production efficiency.

[0004] During the cutting process, because the legs of poultry can rotate relative to the fixed hook, the knees of the poultry are prone to misalignment with the fixed cutting blade, resulting in deviations in the cutting position, which is detrimental to the consistency of chicken products produced in the factory. Summary of the Invention

[0005] The present invention aims to solve the above problems and provides a poultry leg pre-cutting device that can improve the cutting quality, solving the problem of inconsistent cutting positions of chicken legs and the problem of reduced profits due to the inability to cut the knee cartilage separately.

[0006] A poultry leg pre-cutting device that can improve the cutting quality includes: a frame, a first conveying device, a cutting assembly, a first positioning frame, and a bending drive mechanism. The first conveying device and the cutting assembly are respectively mounted on the frame. The first positioning frame includes a first frame body and a lower support plate. The first conveying device drives the first frame body to move. The lower support plate is located above the first frame body and is movably connected to the first frame body. The bending drive mechanism drives the lower support plate to move vertically relative to the first frame body before passing the cutting assembly.

[0007] Furthermore, the bending drive mechanism includes a bending track and a push rod. The bending track is fixed in position relative to the frame and has a bending section with varying heights. The upper end of the push rod contacts the lower support plate, and the lower end of the push rod is connected to the bending track and moves along the bending track.

[0008] Furthermore, the lower support plate includes a support portion, a limiting portion, and a guide portion. The left and right sides of the support portion are integrally formed with the limiting portion and the guide portion, respectively. The end of the limiting portion away from the support portion is inclined upward, and the end of the guide portion away from the support portion is inclined downward.

[0009] Furthermore, it also includes a second conveying device and a second positioning frame. The second conveying device is mounted on the frame and drives the second positioning frame to move. The second positioning frame is located above the first positioning frame. The first positioning frame and the second positioning frame correspond one-to-one and move in the same direction.

[0010] Furthermore, the second positioning frame includes a second frame body, a limiting rod, a sliding rod, a spring, and a limiting plate. The limiting plate is fixedly connected to the second frame body, the limiting rod is fixedly connected to the sliding rod, the sliding rod is slidably connected to the second frame body, and the two ends of the spring are in contact with the second frame body and the limiting rod, respectively.

[0011] Furthermore, the cutting assembly includes a cutting frame, a first cutter, a second cutter, and a third cutter. The cutting frame is fixedly connected to the frame. The cutting frame is fixedly connected to the first cutter, the second cutter, and the third cutter from left to right. The second cutter has a first horizontal blade, and the third cutter has a third inclined blade. The third inclined blade is located above the first horizontal blade, and a third slit that gradually narrows from left to right is formed between the first horizontal blade and the third inclined blade.

[0012] Furthermore, the first cutter includes a cutting plate, a lifting plate, and a holding plate. The left and right ends of the lifting plate are integrally formed with the cutting plate and the holding plate, respectively. The height of the holding plate is greater than the height of the cutting plate. A cutting edge is formed on the front side of the cutting plate, and a first blunt edge is formed on the front side of the lifting plate and the holding plate.

[0013] Furthermore, the second cutter includes a first substrate and a first cutting plate. The first substrate is fixedly connected to the cutting frame. The front side of the first substrate is integrally formed with the first cutting plate. The first cutting plate is bent upward. A first inclined blade and a first horizontal blade are formed on the left and right sides of the upper end of the first cutting plate.

[0014] A second gap is formed between the first horizontal blade and the first cutting blade. The right side of the second gap is connected to the third gap. The second gap is of equal width from left to right.

[0015] A first gap is formed between the first inclined blade and the first cutter. The first gap gradually narrows from left to right, and the right side of the first gap is connected to the second gap.

[0016] Furthermore, the third cutter includes a second substrate and a second cutting plate. The second substrate is fixedly connected to the cutting frame. The front side of the second substrate is integrally formed with the second cutting plate. A second horizontal blade is formed on the front side of the second cutting plate.

[0017] The third inclined blade is formed on the second substrate, and the third inclined blade is located to the left of the second horizontal blade.

[0018] Furthermore, it also includes a centering rod, which is located on the side of the first conveying device. The centering rod includes a wave-shaped rod and a straight rod. The end of the straight rod away from the first conveying device is integrally formed with the wave-shaped rod. The wave-shaped rod is wave-shaped, and the end of the wave-shaped rod away from the wave-shaped rod is inclined forward and downward.

[0019] It also includes a third conveying device and a fixed hook. The third conveying device is located in front of the first conveying device and the cutting assembly. The third conveying device drives the fixed hook to move from left to right.

[0020] The present invention has the following advantages:

[0021] 1. After the chicken leg contacts the first positioning frame and the second positioning frame respectively, the lower support plate moves up and down to drive the chicken leg to rotate and move up and down, so that the chicken leg contacts the positioning components, ensuring that the cutting position of the subsequent cutting assembly is accurate, thus solving the problem of poor consistency of chicken products produced in the factory.

[0022] 2. The first cut separates the skin and flesh on the outer side of the knee cartilage while maintaining their positions. The knee cartilage is then positioned through the second and third slits. The second and third cuts then completely cut off the knee cartilage, resulting in a complete piece of knee cartilage that is not attached to the skin and flesh. This makes it easier to process the knee cartilage into specific products, saving the manual separation process, increasing the success rate and efficiency of separation, and improving production profits. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0024] Figure 1 : A three-dimensional structural schematic diagram of the present invention;

[0025] Figure 2 : A top view of the structure of the present invention;

[0026] Figure 3: A perspective view of the present invention after removing the frame and the third conveying device;

[0027] Figure 4 : Figure 3 A magnified view of a section at point A in the middle;

[0028] Figure 5 : Figure 3 A schematic diagram of the three-dimensional structure after removing some components;

[0029] Figure 6 : Figure 5 A magnified view of a section at point B in the middle;

[0030] Figure 7 : A three-dimensional structural diagram of the bending drive mechanism;

[0031] Figure 8 : Figure 7 A magnified view of a section at point C;

[0032] Figure 9 : Figure 5 Front view structural diagram;

[0033] Figure 10 : Figure 9 Schematic diagram of the cross-sectional structure at point DD;

[0034] Figure 11 : A three-dimensional structural diagram of the cutting assembly;

[0035] Figure 12 : Figure 11 A magnified view of a section at point E in the middle;

[0036] Figure 13 : Front view structural diagram of the cut assembly;

[0037] Figure 14 : Top view of the cut assembly;

[0038] Figure 15 : A three-dimensional structural diagram of the first cutter;

[0039] Figure 16 : A three-dimensional structural diagram of the second cutter;

[0040] Figure 17 : A three-dimensional structural diagram of the third cutter;

[0041] Figure 18 : A three-dimensional structural diagram of the centering lever. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and examples:

[0043] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] like Figures 1 to 18 As shown, a poultry leg pre-cutting device that can improve cutting quality includes: a frame 1, a first conveying device 2, a cutting assembly 4, a first positioning frame 5, and a bending drive mechanism. The first conveying device 2 and the cutting assembly 4 are respectively installed on the frame 1. The first positioning frame 5 includes a first frame body 51 and a lower support plate 52. The first conveying device 2 drives the first frame body 51 to move. The lower support plate 52 is located above the first frame body 51 and is movably connected to the first frame body 51. The bending drive mechanism drives the lower support plate 52 to move vertically relative to the first frame body 51 before passing the cutting assembly 4.

[0047] Furthermore, such as Figure 7 and Figure 8 As shown, the bending drive mechanism includes a bending track 24 and a top rod 53. The bending track 24 is fixed relative to the frame 1 and has a bending section 241 with varying heights. The upper end of the top rod 53 contacts the lower support plate 52, and the lower end of the top rod 53 is connected to the bending track 24 and moves along the bending track 24.

[0048] Optionally, the lower support plate 52 is slidably connected to the first frame 51 (not shown in the figure).

[0049] Optionally, one end of the lower support plate 52 away from the top rod 53 is rotatably connected to the first frame 51, such as... Figure 8As shown. Preferably, the end of the lower support plate 52 away from the top rod 53 is rotatably connected to the first track 23. The top rod 53 is connected to the bottom of the lower support plate 52 via a connecting shaft. The connecting shaft passes through the top rod 53 and the lower support plate 52. There is a gap between the connecting shaft and the top rod 53 or the lower support plate 52, and the gap ensures that the relative movement between the top rod 53 and the lower support plate 52 will not interfere.

[0050] Preferably, the bending drive mechanism further includes a bending roller 54, the bending track 24 is rotatably connected to the lower end of the top rod 53, and the bending roller 54 is located in and connected to the bending track 24. The bending track 24 only has some undulations in the part before the cutting assembly 4, and the position of the chicken leg 9 is aligned by vibrating the chicken leg 9.

[0051] Furthermore, the lower support plate 52 includes a support portion 521, a limiting portion 522, and a guide portion 523. The left and right sides of the support portion 521 are integrally formed with the limiting portion 522 and the guide portion 523, respectively. The end of the limiting portion 522 away from the support portion 521 is inclined upward, and the end of the guide portion 523 away from the support portion 521 is inclined downward. It should be noted that the vertical position refers to the vertical position of the first frame 51 when it is in the working position (i.e., when the first frame 51 is above the first conveying device 2).

[0052] Furthermore, the first conveying device 2 includes a first conveying frame 21, a first chain 22, a first track 23 and a first driving mechanism. The first chain 22 is slidably connected to the first conveying frame 21 and is connected to the first frame 51. The first driving mechanism drives the first chain 22 to move, and the first track 23 is fixedly connected to the first conveying frame 21.

[0053] Furthermore, the bent track 24 is fixedly connected to the first conveyor frame 21, and the bent track 24 is a closed track.

[0054] Furthermore, the first positioning frame 5 also includes a first roller 55, which is rotatably connected to the first frame 51 and is located in and connected to the first track 23. The first roller 55 and the first track 23 cooperate to ensure that the first positioning frame 5 can only move along the closed first track 23.

[0055] Furthermore, it also includes a second conveying device 3 and a second positioning frame 7. The second conveying device 3 is mounted on the frame 1 and drives the second positioning frame 7 to move. The second positioning frame 7 is located above the first positioning frame 5. The first positioning frame 5 and the second positioning frame 7 correspond one-to-one and move in the same direction.

[0056] Furthermore, the second positioning frame 7 includes a second frame body 71, a limiting rod 72, a sliding rod 73, a spring 74, and a limiting plate 76. The limiting plate 76 is fixedly connected to the second frame body 71, the limiting rod 72 is fixedly connected to the sliding rod 73, the sliding rod 73 is slidably connected to the second frame body 71, and the two ends of the spring 74 contact the second frame body 71 and the limiting rod 72, respectively. The second positioning frame 7 contacts the upper inner curved side of the chicken leg 9, and the sliding rod 73 can move to accommodate chicken legs 9 of different sizes.

[0057] Furthermore, the second conveying device 3 includes a second conveying frame 31, a second chain 32, a second track 33, and a second drive mechanism. The second chain 32 is slidably connected to the second conveying frame 31 and connected to the second frame 71. The second drive mechanism drives the second chain 32 to move, and the second track 33 is fixedly connected to the second conveying frame 31.

[0058] Furthermore, the second positioning frame 7 also includes a second roller 75, which is rotatably connected to the second positioning frame 7 and is located in and connected to the second track 33. The second roller 75 cooperates with the second track 33, ensuring that the second positioning frame 7 can only move along the closed second track 33.

[0059] Furthermore, the cutting assembly 4 includes a cutting frame 41, a first cutter 43, a second cutter 44, and a third cutter 45. The cutting frame 41 is fixedly connected to the frame 1. The cutting frame 41 is fixedly connected to the first cutter 43, the second cutter 44, and the third cutter 45 from left to right. The second cutter 44 has a first horizontal blade 444, and the third cutter 45 has a third inclined blade 455. The third inclined blade 455 is located above the first horizontal blade 444. A third slit 450 that gradually narrows from left to right is formed between the first horizontal blade 444 and the third inclined blade 455.

[0060] Furthermore, the first cutter 43 includes a cutting plate 431, a lifting plate 432, and a holding plate 433. The left and right ends of the lifting plate 432 are integrally formed with the cutting plate 431 and the holding plate 433, respectively. The height of the holding plate 433 is greater than the height of the cutting plate 431. A cutting edge 434 is formed on the front side of the cutting plate 431, and a first blunt edge 435 is formed on the front side of the lifting plate 432 and the holding plate 433.

[0061] Furthermore, the second cutter 44 includes a first substrate 441 and a first cutting plate 442. The first substrate 441 is fixedly connected to the cutting frame 41. The front side of the first substrate 441 is integrally formed with the first cutting plate 442. The first cutting plate 442 is bent upward. A first inclined blade 443 and a first horizontal blade 444 are formed on the left and right sides of the upper end of the first cutting plate 442.

[0062] Preferably, a second gap 440 is formed between the first horizontal blade 444 and the first cutter 43, and the right side of the second gap 440 is connected to the third gap 450. The second gap 440 has the same width from left to right.

[0063] Preferably, a first gap 430 is formed between the first inclined blade 443 and the first cutter 43, the first gap 430 gradually narrows from left to right, and the right side of the first gap 430 is connected to the second gap 440.

[0064] Furthermore, the third cutter 45 includes a second substrate 451 and a second cutting plate 452. The second substrate 451 is fixedly connected to the cutting frame 41. The front side of the second substrate 451 is integrally formed with the second cutting plate 452. A second horizontal blade 454 is formed on the front side of the second cutting plate 452.

[0065] Preferably, the third inclined blade 455 is formed on the second substrate 451, and the third inclined blade 455 is located to the left of the second horizontal blade 454.

[0066] Furthermore, the second cutting plate 452 is bent upwards, and the included angle between the second cutting plate 452 and the second substrate 451 is 166° to 176°. When cutting chicken legs, the upwardly bent second cutting plate 452 can adapt to the inclined connection between the thigh and the calf.

[0067] Preferably, the included angle between the second cutting plate 452 and the second substrate 451 is 171°.

[0068] Preferably, a third inclined blade 455 is also formed on the front side of the second cutting plate 452, and the third inclined blade 455 is located between the third inclined blade 455 and the second horizontal blade 454.

[0069] Furthermore, it also includes a positioning rod 42, which is fixedly connected to the cutting frame 41 and is located behind the first horizontal blade 444 and the third inclined blade 455.

[0070] Furthermore, the second cutter 44 is located below the first cutter 43 and the third cutter 45.

[0071] Furthermore, it also includes a straightening rod 6, which is located on the side of the first conveying device 2. The straightening rod 6 includes a wave-shaped rod 61 and a straight rod 62. The end of the straight rod 62 away from the first conveying device 2 is integrally formed with the wave-shaped rod 61. The wave-shaped rod 61 is S-shaped, and the end of the wave-shaped rod 61 away from the wave-shaped rod 61 is inclined forward and downward. The straightening rod 6 is fixedly connected to the straightening rod frame 11, and the straightening rod frame 11 is fixedly connected to the frame 1.

[0072] Furthermore, it also includes a third conveying device 81 and a fixed hook 8. The third conveying device 81 is located in front of the first conveying device 2 and the cutting assembly 4. The third conveying device 81 drives the fixed hook 8 to move from left to right. The third conveying device 81 is mounted on the frame 1.

[0073] Working principle:

[0074] During operation, the chicken leg 9 is moved by the fixed hook 8, and the direction of movement of the chicken leg 9 is as follows: Figure 2 and Figure 14 As shown by the hollow arrow in the diagram, the chicken leg 9 first contacts the wave rod 61 of the adjusting rod 6. The chicken leg 9 is driven by the wave rod 61 to vibrate, thereby causing the chicken leg 9 to rotate to the knee bend and contact the adjusting rod 6, thus completing the initial positioning of the chicken leg 9.

[0075] As the chicken leg 9 gradually moves between the first conveying device 2 and the second conveying device 3, the first positioning frame 5 and the second positioning frame 7 gradually approach the chicken leg 9 until the chicken leg 9 contacts the first positioning frame 5 and the second positioning frame 7.

[0076] The lower leg of chicken leg 9 is suspended by the fixed hook 8 and moves until it contacts the first positioning frame 5 and the second positioning frame 7. Then, the lower support plate 52 swings up and down under the influence of the bent track 24. Driven by the lower support plate 52, the chicken leg 9 vibrates until the lower end of the thigh contacts the support part 521, the back of the lower leg contacts the limiting plate 76, the limiting part 522 contacts the back of the thigh, and the lower leg near the inner bend of the knee contacts the limiting rod 72. At this point, the chicken leg 9 is positioned by the first positioning frame 5 and the second positioning frame 7.

[0077] Afterwards, the fixed hook 8, the first positioning frame 5, and the second positioning frame 7 move synchronously through the cutting assembly 4. Before cutting, the outer side of the lower leg (i.e., the outer side of the inward bend of the chicken leg) contacts the positioning rod 42 and slides along the positioning rod 42, which positions the chicken leg 9.

[0078] During the cutting, the cutting blade 434 makes a cut below the knee cartilage, cutting through the skin and flesh below the knee cartilage to form an incision. Then, the first blunt blade 435 of the lifting plate 432 lifts the skin and flesh above the incision upwards until the skin and flesh above the incision extend above the knee cartilage. The skin and flesh above the incision are then held in position above the first blunt blade 435 of the holding plate 433, thus keeping the knee cartilage exposed.

[0079] As the chicken leg continues to move to the right, the knee cartilage enters the first slit 430, and the inclined first blade 443 cuts into the chicken leg 9, gradually increasing the depth of the cut. The knee cartilage then enters the second slit 440, where the horizontal first blade 444 completely cuts open the lower incision, and the first blunt blade 435 and the first horizontal blade 444 position the knee cartilage. The knee cartilage enters the third slit 450, and as the slit narrows, the first horizontal blade 444 and the third inclined blade 455 completely cut the knee cartilage off the chicken leg 9. Because the skin and meat above the incision are held in place by the retaining plate 433 and the second base plate 451 during the cutting of the knee cartilage, the cut knee cartilage is not connected to the skin and meat. The cut knee cartilage falls through the hole (not shown) in the second cutter 44 into the collecting device.

[0080] As the chicken leg 9 moves, the second cutting plate 452 enters between the incisions of the thigh and calf, continuing to cut the chicken meat between the thigh and calf longitudinally. After cutting, the chicken leg leaves the cutting assembly 4 along with the fixing hook. It should be noted that "cutting complete" means, depending on the needs of the product, that the thigh and calf are completely separated or not completely cut.

[0081] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A poultry leg pre-cutting device that improves cutting quality, characterized in that, include: The machine frame (1), the first conveying device (2), the cutting assembly (4), the first positioning frame (5) and the bending drive mechanism are respectively installed on the machine frame (1). The first positioning frame (5) includes a first frame body (51) and a lower support plate (52). The first conveying device (2) drives the first frame body (51) to move. The lower support plate (52) is located above the first frame body (51) and is movably connected to the first frame body (51). The bending drive mechanism drives the lower support plate (52) to move in the vertical direction relative to the first frame body (51) before passing the cutting assembly (4). The bending drive mechanism includes a bending track (24) and a push rod (53). The bending track (24) is fixed relative to the frame (1). The bending track (24) has a bending section (241) with high and low undulations. The upper end of the push rod (53) contacts the lower support plate (52). The lower end of the push rod (53) is connected to the bending track (24) and moves along the bending track (24). The cutting assembly (4) includes a cutting frame (41), a first cutter (43), a second cutter (44), and a third cutter (45). The cutting frame (41) is fixedly connected to the frame (1). The cutting frame (41) is fixedly connected to the first cutter (43), the second cutter (44), and the third cutter (45) from left to right. The second cutter (44) has a first horizontal blade (444), and the third cutter (45) has a third inclined blade (455). The third inclined blade (455) is located above the first horizontal blade (444). A third slit (450) that gradually narrows from left to right is formed between the first horizontal blade (444) and the third inclined blade (455). The first cutter (43) includes a cutting plate (431), a lifting plate (432), and a holding plate (433). The left and right ends of the lifting plate (432) are integrally formed with the cutting plate (431) and the holding plate (433), respectively. The height of the holding plate (433) is greater than the height of the cutting plate (431). A cutting edge (434) is formed on the front side of the cutting plate (431), and a first blunt edge (435) is formed on the front side of the lifting plate (432) and the holding plate (433). The second cutter (44) includes a first substrate (441) and a first cutting plate (442). The first substrate (441) is fixedly connected to the cutting frame (41). The front side of the first substrate (441) is integrally formed with the first cutting plate (442). The first cutting plate (442) is bent upward. The upper left and right sides of the first cutting plate (442) are formed with a first inclined blade (443) and a first horizontal blade (444). A second gap (440) is formed between the first horizontal blade (444) and the first cutting blade (43). The right side of the second gap (440) is connected to the third gap (450). The second gap (440) is of equal width from left to right. A first gap (430) is formed between the first inclined blade (443) and the first cutter (43), the first gap (430) gradually narrows from left to right, and the right side of the first gap (430) is connected to the second gap (440).

2. The poultry leg pre-cutting device according to claim 1, characterized in that: The lower support plate (52) includes a support part (521), a limiting part (522) and a guide part (523). The left and right sides of the support part (521) are integrally formed with the limiting part (522) and the guide part (523) respectively. The end of the limiting part (522) away from the support part (521) is inclined upward, and the end of the guide part (523) away from the support part (521) is inclined downward.

3. The poultry leg pre-cutting device according to claim 1, characterized in that: It also includes a second conveying device (3) and a second positioning frame (7). The second conveying device (3) is installed on the frame (1). The second conveying device (3) drives the second positioning frame (7) to move. The second positioning frame (7) is located above the first positioning frame (5). The first positioning frame (5) and the second positioning frame (7) correspond one-to-one and move in the same direction.

4. The poultry leg pre-cutting device according to claim 3, characterized in that: The second positioning frame (7) includes a second frame (71), a limiting rod (72), a sliding rod (73), a spring (74), and a limiting plate (76). The limiting plate (76) is fixedly connected to the second frame (71), the limiting rod (72) is fixedly connected to the sliding rod (73), the sliding rod (73) is slidably connected to the second frame (71), and the two ends of the spring (74) are in contact with the second frame (71) and the limiting rod (72) respectively.

5. A poultry leg pre-cutting device according to claim 1, characterized in that: The third cutter (45) includes a second substrate (451) and a second cutting plate (452). The second substrate (451) is fixedly connected to the cutting frame (41). The front side of the second substrate (451) is integrally formed with the second cutting plate (452). A second horizontal blade (454) is formed on the front side of the second cutting plate (452). The third inclined blade (455) is formed on the second substrate (451), and the third inclined blade (455) is located to the left of the second horizontal blade (454).

6. The poultry leg pre-cutting device according to claim 1, characterized in that: It also includes a centering rod (6), which is located on the side of the first conveying device (2). The centering rod (6) includes a wave rod (61) and a straight rod (62). The end of the straight rod (62) away from the first conveying device (2) is integrally formed with the wave rod (61). The wave rod (61) is wave-shaped. The end of the wave rod (61) away from the straight rod (62) is inclined forward and downward. It also includes a third conveying device (81) and a fixed hook (8), the third conveying device (81) being located in front of the first conveying device (2) and the cutting assembly (4), the third conveying device (81) driving the fixed hook (8) to move from left to right.

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