Poultry leg pre-cutting device

Abstract

The invention relates to a poultry leg pre-cutting device which comprises a rack, a first conveying device, a cutting assembly and a first positioning frame, the first conveying device and the cutting assembly are installed on the rack, and the first conveying device drives the first positioning frame to move to pass through the cutting assembly; the cutting assembly comprises a cutting rack, a first cutter, a second cutter and a third cutter, the cutting rack is fixedly connected with the rack, and the cutting rack is fixedly connected with the first cutter, the second cutter and the third cutter in sequence from left to right. After the chicken legs make contact with the first positioning frame and the second positioning frame, the lower supporting plate moves in the vertical direction to drive the chicken legs to rotate and move up and down, so that the chicken legs make contact with all positioned components, it is ensured that the cutting position of a cutting assembly is accurate, and the problem that the consistency of chicken products produced in a factory is poor is solved.

Description

Technical Field

[0001] The invention relates to the field of poultry cutting, in particular to a poultry leg pre-cutting device. Background Art

[0002] When the poultry is cut in the assembly line, a fixed hook (such as the invention patent with the authorization announcement number CN219679639U) is connected to the legs of the poultry, and the fixed hook moves along the assembly line to drive the poultry to move. Before the poultry thigh and calf are cut, the torso of the poultry has been cut off, and only the chicken legs are hooked on the fixed hook.

[0003] The existing cutting operation requires the chicken legs to be cut into thighs and drumsticks. Currently, the knee cartilage between the thighs and drumsticks is directly cut with a cutting knife to separate the thighs from the drumsticks. The current cutting device directly separates the thighs from the drumsticks, but does not separate the knee cartilage between the thighs and the drumsticks, so that the knee cartilage cannot be cut off separately, resulting in the inability to use the knee cartilage separately, which reduces production benefits. Summary of the invention

[0004] The present invention aims to solve the above-mentioned problem and provides a poultry leg pre-cutting device, which solves the problem that knee cartilage cannot be cut off separately, resulting in reduced profit.

[0005] A poultry leg pre-cutting device comprises: a frame, a first conveying device, a cutting assembly and a first positioning frame, wherein the first conveying device and the cutting assembly are respectively mounted on the frame, the first conveying device drives the first positioning frame to move through the cutting assembly, the cutting assembly comprises a cutting frame, a first cutter, a second cutter and a third cutter, the cutting frame is fixedly connected to the frame, and the cutting frame is fixedly connected to the first cutter, the second cutter and the third cutter in sequence from left to right.

[0006] Furthermore, the second cutter is formed with a first horizontal edge, the third cutter is formed with a third inclined edge, the third inclined edge is located above the first horizontal edge, and a third gap is formed between the first horizontal edge and the third inclined edge, which gradually narrows from left to right.

[0007] Furthermore, the first positioning frame includes a first frame body and a lower support plate, the lower support plate is located above the first frame body and connected to the first frame body, the lower support plate includes a supporting portion, a limiting portion and a guiding portion, the left and right sides of the supporting portion are respectively integrally formed with the limiting portion and the guiding portion, the end of the limiting portion away from the supporting portion is inclined upward, and the end of the guiding portion away from the supporting portion is inclined downward.

[0008] Furthermore, it also includes a second conveying device and a second positioning frame, the second conveying device is installed on the frame, the second conveying device 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 to each other one by one and have the same movement direction.

[0009] 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 both ends of the spring are respectively in contact with the second frame body and the limiting rod.

[0010] Furthermore, the first cutting knife includes a cutting plate, a lifting plate and a retaining plate, the left and right ends of the lifting plate are respectively integrally formed with the cutting plate and the retaining plate, the height of the retaining 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 sides of the lifting plate and the retaining plate.

[0011] Furthermore, the second cutter comprises a first base plate and a first cutting plate, the first base plate is fixedly connected to the cutting frame, the front side of the first base plate and the first cutting plate are integrally formed, the first cutting plate is bent upward, and 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; A second gap is formed between the first horizontal blade and the first cutter, the right side of the second gap is connected to the third gap, and the second gap has the same width from left to right and from top to bottom; 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.

[0012] Further, the third cutter comprises a second base plate and a second cutting plate, the second base plate is fixedly connected to the cutting frame, the front side of the second base plate and the second cutting plate are integrally formed, and the front side of the second cutting plate is formed with a second horizontal blade; The third inclined edge is formed on the second substrate, and the third inclined edge is located on the left side of the second horizontal edge.

[0013] Furthermore, the second cutting plate is bent upward, and an included angle between the second cutting plate and the second base plate is 165° to 175°.

[0014] Furthermore, it also includes a straightening rod, which is located on the side of the first conveying device, and includes a wave rod and a straight rod, and one end of the straight rod away from the first conveying device is integrally formed with the wave rod, and the wave rod is wavy, and one end of the wave rod away from the wave rod is inclined forward and downward; It also includes a third conveying device and a fixed hook, wherein the third conveying device is located in front of the first conveying device and the cutting assembly, and the third conveying device drives the fixed hook to move from left to right.

[0015] The present invention has the following advantages: the first cutter separates the skin and flesh on the outside of the knee cartilage and maintains the position of the skin and flesh, and the knee cartilage is positioned through the second slit and the third slit, and then the second cutter and the third cutter completely cut the knee cartilage, thereby obtaining a complete knee cartilage without adhesion of skin and flesh, thereby facilitating the processing of the knee cartilage into corresponding products separately, saving the manual process of separating the knee cartilage, improving the success rate and efficiency of separation, and improving production benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 : A schematic diagram of the three-dimensional structure of the present invention; Figure 2 : A schematic diagram of the top view of the structure of the present invention; Figure 3 : A three-dimensional diagram of the present invention after removing the frame and the third conveying device; Figure 4 : Figure 3 A partial enlarged view of the middle A; Figure 5 : Figure 3 Schematic diagram of the three-dimensional structure after removing some parts; Figure 6 : Figure 5 A partial enlarged view of point B in the middle; Figure 7 : Schematic diagram of the three-dimensional structure of the bending drive mechanism; Figure 8 : Figure 7 A partial enlarged view of point C in the middle; Fig. 9 : Figure 5 Schematic diagram of the main structure; Fig.10 : Fig. 9 Schematic diagram of the cross-sectional structure at DD in the middle; Fig.11 : Schematic diagram of the three-dimensional structure of the cutting assembly; Fig.12 : Fig.11 A partial enlarged view of point E in the middle; Fig.13 : Schematic diagram of the main structure of the cutting assembly; Fig.14 : Schematic diagram of the top view of the cutting assembly; Fig.15 : Schematic diagram of the three-dimensional structure of the first cutting knife; Fig.16 : Schematic diagram of the three-dimensional structure of the second cutting knife; Fig.17 : Schematic diagram of the three-dimensional structure of the third cutter; Fig.18 : Schematic diagram of the three-dimensional structure of the straightening rod. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and examples: Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. like Figures 1 to 18 As shown, a poultry leg pre-cutting device includes: a frame 1, a first conveying device 2, a cutting assembly 4 and a first positioning frame 5, the first conveying device 2 and the cutting assembly 4 are respectively installed on the frame 1, the first conveying device 2 drives the first positioning frame 5 to move through the cutting assembly 4, 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, and 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 in sequence.

[0021] Furthermore, the second cutter 44 is formed with a first horizontal edge 444, and the third cutter 45 is formed with a third inclined edge 455, wherein the third inclined edge 455 is located above the first horizontal edge 444, and a third gap 450 is formed between the first horizontal edge 444 and the third inclined edge 455, which gradually narrows from left to right.

[0022] Furthermore, the first positioning frame 5 includes a first frame body 51 and a lower support plate 52, the lower support plate 52 is located above the first frame body 51 and connected to the first frame body 51, the lower support plate 52 includes a supporting portion 521, a limiting portion 522 and a guiding portion 523, the left and right sides of the supporting portion 521 are respectively integrally formed with the limiting portion 522 and the guiding portion 523, the limiting portion 522 is inclined upward at one end away from the supporting portion 521, and the guiding portion 523 is inclined downward at one end away from the supporting portion 521.

[0023] Optionally, the first frame 51 and the lower supporting plate 52 are fixedly connected.

[0024] Alternatively, if Figure 7 and Figure 8 As shown, it also includes a bending drive mechanism, which drives the lower support plate 52 to move up and down relative to the first frame 51 before passing through 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 is formed with a bending portion 241 with undulating heights. The upper end of the push rod 53 contacts the lower support plate 52, and the lower end of the push rod 53 is connected to the bending track 24 and moves along the bending track 24.

[0025] Preferably, 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 8 Preferably, one end of the lower support plate 52 away from the top rod 53 is rotatably connected to the first track 23, and the top rod 53 is connected to the bottom of the lower support plate 52 via a connecting shaft, and the connecting shaft passes through the top rod 53 and the lower support plate 52, and there is a gap between the connecting shaft and the top rod 53 or the lower support plate 52, so that the relative movement between the top rod 53 and the lower support plate 52 will not cause interference.

[0026] Preferably, the bending drive mechanism further comprises 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 the bending track 24 and connected to the bending track 24. The bending track 24 fluctuates only in a part before the cutting assembly 4, and the position of the chicken leg 9 is aligned by vibrating the chicken leg 9.

[0027] After the lower leg end of the chicken leg 9 is suspended by the fixed hook 8 and moves to the chicken leg 9 in contact with the first positioning frame 5 and the second positioning frame 7, the lower support plate 52 swings up and down driven by the bending track 24. The chicken leg 9 vibrates under the drive of the lower support plate 52, so that the chicken leg 9 moves to the lower end of the thigh in contact with the support part 521, the back of the calf in contact with the limiting plate 76, the limiting part 522 in contact with the back of the thigh, and the calf near the inner bend of the knee in contact with the limiting rod 72.

[0028] Further, the lower support plate 52 includes a support portion 521, a limit portion 522 and a guide portion 523. The left and right sides of the support portion 521 are respectively integrally formed with the limit portion 522 and the guide portion 523. The end of the limit 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 upper and lower positions refer to the upper and lower positions when the first frame 51 is in the working position (that is, when the first frame 51 is located above the first conveying device 2).

[0029] Furthermore, the first conveying device 2 includes a first conveying frame 21, a first chain 22, a first rail 23 and a first driving mechanism, the first chain 22 is slidably connected to the first conveying frame 21, the first chain 22 is connected to the first frame 51, the first driving mechanism drives the first chain 22 to move, and the first rail 23 is fixedly connected to the first conveying frame 21.

[0030] Furthermore, the curved track 24 is fixedly connected to the first conveyor frame 21 , and the curved track 24 is a closed track.

[0031] Furthermore, the first positioning frame 5 further includes a first roller 55, which is rotatably connected to the first frame body 51, and the first roller 55 is in the first track 23 and connected to the first track 23. The first roller 55 cooperates with the first track 23 so that the first positioning frame 5 can only move along the closed first track 23.

[0032] Furthermore, 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 have the same movement direction.

[0033] Further, 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, wherein 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 are respectively in contact with the second frame body 71 and the limiting rod 72. The second positioning frame 7 is in contact with the inner bend upper side of the chicken leg 9, and the movement of the sliding rod 73 can adapt to chicken legs 9 of different sizes.

[0034] Furthermore, the second conveying device 3 includes a second conveying frame 31, a second chain 32, a second track 33 and a second driving mechanism, the second chain 32 is slidably connected to the second conveying frame 31, the second chain 32 is connected to the second frame 71, the second driving mechanism drives the second chain 32 to move, and the second track 33 is fixedly connected to the second conveying frame 31.

[0035] Furthermore, the second positioning frame 7 further includes a second roller 75, which is rotatably connected to the second positioning frame 7, and the second roller 75 is in the second track 33 and connected to the second track 33. The second roller 75 cooperates with the second track 33 so that the second positioning frame 7 can only move along the closed second track 33.

[0036] Furthermore, the first cutting knife 43 includes a cutting plate 431, a lifting plate 432 and a retaining plate 433, the left and right ends of the lifting plate 432 are respectively integrally formed with the cutting plate 431 and the retaining plate 433, the height of the retaining 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 sides of the lifting plate 432 and the retaining plate 433.

[0037] 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.

[0038] Preferably, a second slit 440 is formed between the first horizontal edge 444 and the first cutter 43 , the right side of the second slit 440 is connected to the third slit 450 , and the second slit 440 has the same width from left to right and top to bottom.

[0039] Preferably, a first slit 430 is formed between the first inclined blade 443 and the first cutter 43 , the first slit 430 gradually narrows from left to right, and the right side of the first slit 430 is connected to the second slit 440 .

[0040] Furthermore, the third cutter 45 includes a second base plate 451 and a second cutting plate 452 , the second base plate 451 is fixedly connected to the cutting frame 41 , the front side of the second base plate 451 and the second cutting plate 452 are integrally formed, and the front side of the second cutting plate 452 is formed with a second horizontal blade 454 .

[0041] Preferably, the third inclined edge 455 is formed on the second substrate 451 , and the third inclined edge 455 is located on the left side of the second horizontal edge 454 .

[0042] Furthermore, the second cutting plate 452 is bent upward, and the angle between the second cutting plate 452 and the second base plate 451 is 166° to 176°. When cutting chicken legs, the second cutting plate 452 bent upward can adapt to the inclined connection between the thigh and the calf.

[0043] Preferably, the included angle between the second cutting plate 452 and the second base plate 451 is 171°.

[0044] Preferably, a third inclined edge 455 is further formed on the front side of the second cutting plate 452 , and the third inclined edge 455 is located between the third inclined edge 455 and the second horizontal edge 454 .

[0045] Furthermore, it also includes a positioning rod 42 , which is fixedly connected to the cutting frame 41 , and the positioning rod 42 is located behind the first horizontal blade 444 and the third inclined blade 455 .

[0046] Furthermore, the second cutter 44 is located below the first cutter 43 and the third cutter 45 .

[0047] Furthermore, it also includes a straightening rod 6, which is located on the side of the first conveying device 2, and 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, and the wave rod 61 is S-shaped and wavy. The end of the wave rod 61 away from the wave rod 61 is tilted 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.

[0048] 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, and the third conveying device 81 is installed on the frame 1.

[0049] Working principle: During operation, the chicken leg 9 is driven by the fixed hook 8, and the movement direction of the chicken leg 9 is as follows: Figure 2 and Fig.14As shown by the hollow arrow in the figure. The drumstick 9 first contacts the wave rod 61 of the straightening rod 6, and the drumstick 9 is driven by the wave rod 61 to vibrate, so that the drumstick 9 rotates to the inner bend of the knee and contacts the straightening rod 6, completing the initial position positioning of the drumstick 9.

[0050] When 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 .

[0051] The calf end of the chicken leg 9 is suspended by the fixed hook 8 and moves, and the chicken leg 9 gradually moves until the lower end of the thigh contacts the support part 521, the back of the calf contacts the limiting plate 76, the limiting part 522 contacts the back of the thigh, and the calf near the inner bend of the knee contacts the limiting rod 72. At this time, the chicken leg 9 is positioned by the first positioning frame 5 and the second positioning frame 7.

[0052] Afterwards, the fixing 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 calf (i.e., the outer side of the inner bend of the chicken leg) contacts the positioning rod 42 (such as Fig.10 As shown), and slide along the positioning rod 42, the positioning rod 42 positions the chicken leg 9.

[0053] During cutting, the cutting blade 434 cuts the lower part of the knee cartilage, cuts the skin and flesh below the knee cartilage, and forms an incision. Then the first blunt blade 435 of the lifting plate 432 pulls up the skin and flesh above the incision until the skin and flesh above the incision are above the knee cartilage. After that, the skin and flesh above the incision are kept in place above the first blunt blade 435 of the holding plate 433, so that the knee cartilage is kept exposed.

[0054] As the chicken leg continues to move to the right, the knee cartilage enters the first slit 430, and the inclined first inclined blade 443 cuts into the chicken leg 9 and gradually deepens the depth of the cut. After that, the knee cartilage enters the second slit 440, and the horizontal first horizontal blade 444 completely cuts the incision below, 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 from the chicken leg 9. Because during the process of cutting the knee cartilage, the skin and meat above the incision are limited by the retaining plate 433 and the second base plate 451, above them, the cut knee cartilage is not connected to the skin and meat. Among them, the cut knee cartilage falls from the hole of the second cutting knife 44 (not shown in the figure) into the collection device.

[0055] As the chicken leg 9 moves, the second cutting plate 452 enters between the cuts of the thigh and the calf, and continues to longitudinally cut the chicken between the thigh and the calf. After the cutting is completed, the chicken leg leaves the cutting assembly 4 along with the fixed hook. It should be noted that the cutting is completed, which means that the thigh and the calf are completely separated or incompletely cut according to the demand for the product.

[0056] The present invention is described above by way of examples, but the present invention is not limited to the above specific embodiments, and any changes or modifications made based on the present invention belong to the scope of protection claimed by the present invention.

Claims

1. A poultry leg pre-cutting device, characterized in that: include: A frame (1), a first conveying device (2), a cutting assembly (4) and a first positioning frame (5), wherein the first conveying device (2) and the cutting assembly (4) are respectively mounted on the frame (1), the first conveying device (2) drives the first positioning frame (5) to move through the cutting assembly (4), the cutting assembly (4) comprises 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), and the cutting frame (41) is fixedly connected to the first cutter (43), the second cutter (44) and the third cutter (45) in sequence from left to right.

2. A poultry leg pre-cutting device according to claim 1, characterized in that: The second cutting knife (44) is formed with a first horizontal edge (444), and the third cutting knife (45) is formed with a third inclined edge (455), wherein the third inclined edge (455) is located above the first horizontal edge (444), and a third gap (450) is formed between the first horizontal edge (444) and the third inclined edge (455), which gradually narrows from left to right.

3. The poultry leg pre-cutting device according to claim 1, characterized in that: The first positioning frame (5) comprises a first frame body (51) and a lower supporting plate (52); the lower supporting plate (52) is located above the first frame body (51) and is connected to the first frame body (51); the lower supporting plate (52) comprises a supporting portion (521), a limiting portion (522) and a guiding portion (523); the left and right sides of the supporting portion (521) are respectively integrally formed with the limiting portion (522) and the guiding portion (523); an end of the limiting portion (522) away from the supporting portion (521) is inclined upward, and an end of the guiding portion (523) away from the supporting portion (521) is inclined downward.

4. The poultry leg pre-cutting device according to claim 1, characterized in that: The machine also comprises a second conveying device (3) and a second positioning frame (7). The second conveying device (3) is mounted 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 to each other one by one and move in the same direction.

5. A poultry leg pre-cutting device according to claim 4, characterized in that: The second positioning frame (7) comprises 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 two ends of the spring (74) are respectively in contact with the second frame body (71) and the limiting rod (72).

6. A poultry leg pre-cutting device according to claim 2, characterized in that: The first cutting knife (43) comprises a cutting plate (431), a lifting plate (432) and a retaining plate (433); the left and right ends of the lifting plate (432) are respectively integrally formed with the cutting plate (431) and the retaining plate (433); the height of the retaining 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 sides of the lifting plate (432) and the retaining plate (433).

7. A poultry leg pre-cutting device according to claim 2, characterized in that: The second cutter (44) comprises a first base plate (441) and a first cutting plate (442); the first base plate (441) is fixedly connected to the cutting frame (41); the front side of the first base plate (441) and the first cutting plate (442) are integrally formed; the first cutting plate (442) is bent upward; and a first inclined blade (443) and a first horizontal blade (444) are formed on left and right sides of the upper end of the first cutting plate (442); A second slit (440) is formed between the first horizontal blade (444) and the first cutter (43); the right side of the second slit (440) is connected to the third slit (450); and the second slit (440) has the same width from left to right and from top to bottom; A first slit (430) is formed between the first inclined blade (443) and the first cutter (43), the first slit (430) gradually narrows from left to right, and the right side of the first slit (430) is connected to the second slit (440).

8. The poultry leg pre-cutting device according to claim 2, characterized in that: The third cutter (45) comprises a second base plate (451) and a second cutting plate (452); the second base plate (451) is fixedly connected to the cutting machine frame (41); the front side of the second base plate (451) and the second cutting plate (452) are integrally formed; and the front side of the second cutting plate (452) is formed with a second horizontal blade (454); The third inclined edge (455) is formed on the second substrate (451), and the third inclined edge (455) is located on the left side of the second horizontal edge (454).

9. A poultry leg pre-cutting device according to claim 8, characterized in that: The second cutting plate (452) is bent upwards, and an included angle between the second cutting plate (452) and the second base plate (451) is 165° to 175°.

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

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