A lobster grading and screening machine

Abstract

The present invention relates to the technical field of lobster screening equipment, and discloses a lobster grading and screening machine, including a weighing main machine and a grading bin, a conveying assembly and a weighing assembly are installed on the weighing main machine, the weighing assembly is transported and moved by the conveying assembly, the grading bin is fixed on the upper surface of the weighing main machine, and a material guide plate and a material screening plate are arranged on the top of the grading bin. The present invention has the following advantages and effects: lobster weighing and grading are flexibly combined with body length grading and screening, lobsters are quickly and orderly graded and screened by size through the grading bin, and lobster monomers can be smoothly matched with the weighing assembly for single weighing, so as to screen out high-quality lobsters that meet the standards for body length, size and weight, and improve the accuracy and functionality of lobster grading and screening, and at the same time, individual screening and weighing screening can also be operated separately, so as to meet the operation needs under different production and screening situations, and the applicability is strong, and the utilization rate and grading efficiency of the equipment can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of lobster screening equipment, in particular to a lobster grading and screening machine. Background Art

[0002] During the production and processing of lobster food, lobsters need to be graded and screened. Grading and screening help to distinguish lobsters of different qualities to meet different market demands. It can also separate lobsters of good quality from lobsters of poor quality, so that consumers can choose suitable lobster products according to their needs and budget.

[0003] The existing Chinese patent with announcement number CN115413699B discloses a screening device for processing crayfish, including a frame, a table plate of the frame is rotatably connected with a chain, and a plurality of shrimp supporting components are fixed on the chain, including a tray, the tray has an opening on the upper end face, a reversible discharge baffle is provided on one side, and a square frame groove is provided on the bottom plate with a step plate extending out of the discharge baffle. By utilizing the moving tray and various mechanical mechanisms, crayfish of different weights can be sorted within a certain range. The device is simple, ingenious in structure, and low in cost, and is suitable for promotion and use by small and medium-sized enterprises.

[0004] Based on the above situation, the inventors believe that currently in the lobster grading and screening operation, lobsters are often graded by weighing. Although under normal circumstances, the weight of a lobster is positively correlated with its size, for lobsters with more special circumstances, that is, lobsters with a larger shell weight ratio but a smaller body length, these lobsters have less meat quality. If you want to quickly screen out high-quality lobsters that meet the weight and length standards, it is difficult to achieve by weighing, resulting in the need for secondary screening later, affecting processing efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a lobster grading and screening machine, which has the function of quickly grading and screening lobsters according to their length and weight, meeting the screening needs in different situations, while also being able to reduce the need for rescreening and improve the effect of processing needs.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a lobster grading and screening machine, comprising a weighing main machine and a grading bin, a conveying assembly and a weighing assembly are installed on the weighing main machine, the weighing assembly is transported and moved by the conveying assembly, the grading bin is fixedly mounted on the upper surface of the weighing main machine, a first guide plate and a screen plate are arranged at the top of the grading bin, after the lobster is poured onto the first guide plate, it is sent into the grading bin along the screen plate for grading treatment, the outer side of the screen plate is connected with the anti-blocking assembly, so that the lobster is subjected to the anti-blocking treatment of feeding through the anti-blocking assembly, a screening control assembly for size grading and screening of lobsters is installed inside the grading bin, the size of the sieve opening of the screening control assembly can be flexibly adjusted, the outer side of the screening control assembly is connected with the discharge assembly, the lobster is driven to be screened and transported on the screening control assembly through the discharge assembly, a receiving assembly and a discharging frame are also arranged inside the grading bin, after being screened by the screening control assembly, the lobster falls into the discharging frame through the receiving assembly, and is finally received and weighed one by one by the corresponding weighing assembly.

[0007] The present invention is further configured as follows: the first material guide plate includes a top plate, a slope, a guide plate, a guide frame and a guide port; the outer side of the top plate is fixed to the grading bin; the slope is arranged on the upper surface of the top plate; the guide plate intervals are fixed on the upper surface of the slope; a first conveying line for separating and conveying lobsters is formed between adjacent guide plates; the guide frame is fixed at one end of the top plate close to the screening plate; and the guide port is opened on the guide frame.

[0008] By adopting the above technical solution, the stacking of lobsters can be reduced when they pass through the guide port.

[0009] The present invention is further configured as follows: the screening plate includes a support rod, a second guide plate, a convex strip, a sliding column, a baffle and a first spring; the outer side of the support rod is fixed to the second guide plate; the second guide plate is inclined as a whole; the lobster falls onto the surface of the second guide plate along the slope; the convex strips are arranged and fixed on the upper surface of the second guide plate; the sliding column is fixed at both ends of the support rod; the support rod is linearly slidably matched with the grading bin through the sliding column; the baffle is coaxially fixed to the outer side of the sliding column; a first spring for resetting is arranged between the baffle and the grading bin.

[0010] By adopting the above technical solution, when the slide column slides, the baffle plate is driven by the spring to slide and reset, so that the slide column and the second material guide plate can be reset synchronously.

[0011] The present invention is further configured such that the outer contour of the sliding column is a polygonal structure.

[0012] By adopting the above technical solution, the sliding mode of the sliding column on the grading bin is limited to horizontal linear sliding.

[0013] The present invention is further configured as follows: the anti-blocking component includes a driving component, a transition component and a traction component, the driving component is installed on the grading bin, the transition component is connected to the outside of the driving component, and the traction component is arranged between the transition component and the second material guide plate to drive the second material guide plate to move back and forth in the length direction through the traction component.

[0014] By adopting the above technical solution, the reciprocating movement of the second material guide plate drives the convex strips to provide material discharge combing vibration to the lobster, thereby helping the lobster to be discharged downward from the guide port more smoothly.

[0015] The present invention is further configured as follows: the driving assembly includes a first frame rod, a driving gear and a first motor, both ends of the first frame rod are rotatably mounted on the grading bin, the driving gear is coaxially fixed on the first frame rod, the first motor is fixed on the outside of the grading bin, and the output shaft of the first motor is fixed to the first frame rod;

[0016] The transition assembly includes a driven gear, a push plate, a support frame and a push foot. The outer side of the driven gear is meshed with the driving gear. One end of the push plate is fixed to the axis of the driven gear, and the other end is rotatably connected to the support frame. The push foot is fixed to the bottom end of the support frame. The front and rear ends of the push foot are rotatably connected to the first pulling arm and the second pulling arm respectively. The ends of the first pulling arm and the second pulling arm away from the push foot are rotatably connected to the grading bin and the traction assembly respectively. The outer side of the driven gear is rotatably mounted on the mounting plate. The outer end of the mounting plate is fixed to the second frame rod. Both ends of the second frame rod are fixed to the grading bin.

[0017] The traction assembly includes a traction block, an arc surface, a synchronous frame and a third frame rod. The bottom end of the traction block is rotatably connected to the second traction arm, the arc surface is arranged on the outside of the traction block, the rear end of the synchronous frame is fixed to the second material guide plate, and the front end of the synchronous frame is in sliding contact with the arc surface. The top end of the traction block is rotatably arranged on the third frame rod, and both ends of the third frame rod are fixedly connected to the grading bin.

[0018] By adopting the above technical solution, the traction block can stably rotate with the third frame rod as a fulcrum.

[0019] The present invention is further configured as follows: the screening control assembly comprises a mounting groove, a regulating assembly and a conveying frame, the mounting groove is opened on the inner side of the grading bin, the regulating assembly is connected to the inner wall of the mounting groove, and the conveying frame is installed in the mounting groove;

[0020] A mounting opening is provided at the bottom end of the top plate, the mounting slot includes a vertical slot and a horizontal slot that are interconnected, the regulating assembly includes a vertical frame, a horizontal frame, a push-pull frame, a regulating wheel, and a second motor, the upper and lower ends of the vertical frame slide along the vertical slot, the two ends of the horizontal frame are fixed to the vertical frame, the push-pull frame is fixed to the outside of the horizontal frame, the outside of the regulating wheel is in sliding contact with the inner wall of the push-pull frame, the outside of the second motor is fixed in the mounting opening, and the output shaft of the second motor is fixed to the regulating wheel after passing through the mounting opening;

[0021] The conveying frame includes a fixed block, a slider, a conveying rod, a push rod, a push ring and a second spring. The fixed block is fixedly mounted on the inner side of the transverse groove, and the outer side of the slider is linearly slidably matched with the transverse groove. The number of sliders is at least two and is equidistantly spaced in the transverse groove. Both ends of the conveying rod are rotatably mounted on the fixed block and the slider. One end of the push rod is slidably matched with the inside of the fixed block, and the other end is fixedly mounted on the vertical frame. The outer side of the push rod is slidably connected with the inside of the slider. The push ring is coaxially fixed to the outer side of the push rod. The push rod pushes the slider through the push ring. A second spring is provided between the slider and the fixed block and between the sliders.

[0022] By adopting the above technical solution, when the regulating wheel is reset and rotates to drive the push rod to reset, the slider can be reset synchronously through the second spring.

[0023] The present invention is further configured as follows: the discharge assembly includes a first transmission belt, a second transmission belt, a first support rod, a second support rod, a third motor and a synchronous assembly, a sponge block is fixedly arranged on the surface of the first transmission belt, the first transmission belt is arranged at the middle part above the conveying rod, the second transmission belt is arranged at the left and right ends above the conveying rod, the transmission wheels of the first transmission belt and the second transmission belt are coaxially fixedly provided with the first support rod and the second support rod, the outer sides of the first support rod and the second support rod are rotatably connected with the grading bin, the third motor is fixedly arranged on the outer side of the grading bin, and the output shaft of the third motor is fixed to the first support rod, the first support rod and the second support rod are transmission-coordinated through the synchronous assembly, the third transmission belt is arranged below the first transmission belt, and the third transmission belt is located below the conveying rod to send the screened lobsters outward;

[0024] The synchronization component includes a first gear, a second gear and a third gear. The first gear and the third gear do not contact each other and are coaxially fixed on the first support rod and the second support rod respectively. The second gear is rotatably installed on the outside of the grading bin, and the outside of the second gear is meshed with the first gear and the third gear.

[0025] By adopting the above technical solution, when the first support rod rotates, the first gear is driven to rotate synchronously, and the transmission is transmitted to the third gear through the second gear.

[0026] The present invention is further configured as follows: the receiving assembly includes a rotary rod, a curtain receiving assembly, a curtain frame and a reset assembly, the two ends of the rotary rod are rotatably mounted on the grading bin, the bottom end of the curtain receiving assembly is fixed to the grading bin, and the top end of the curtain receiving assembly is fixed to the curtain frame, the two ends of the curtain frame are fixed to the slider, and the reset assembly is arranged outside the grading bin to drive the rotary rod to reset and rotate;

[0027] The reset assembly includes a fourth gear, a frame plate, a tooth groove, a bar, a support and a third spring. The fourth gear is coaxially fixed to the outer end of the rotating rod, the frame plate is arranged on the outside of the grading bin, the tooth grooves are arranged and opened on the side of the frame plate close to the fourth gear, the frame plate is meshed with the fourth gear through the tooth groove, the top end of the bar is slidably connected to the frame plate, and the bottom end of the bar is fixedly connected to the support, and the third spring is arranged between the frame plate and the support.

[0028] By adopting the above technical solution, the two ends of the third spring are fixed to the frame plate and the support, and after the curtain is stretched and relaxed, the frame plate can be reset under the drive of the third spring.

[0029] The present invention is further configured as follows: a plurality of side plates are arranged and fixedly arranged on the inner wall of the grading bin, the side plates are located between the conveying rod and the first transmission belt, a second conveying line corresponding to the first conveying line is formed between adjacent side plates, a discharge port and a discharging port are opened on the outer side of the grading bin, a discharge plate is fixedly installed on the inner wall of the discharge port, a support plate is arranged below the discharge port, and the position of the discharging port corresponds to the weighing assembly;

[0030] The discharging frame includes a frame body, a limiting plate and a discharging assembly. The frame body is fixedly arranged inside the grading bin and is located below the conveying rod. Both ends of the third transmission belt are installed on the frame body. The limiting plates are arranged and fixedly arranged inside the frame body. A third conveying line is formed between adjacent limiting plates. The positions of the first conveying line, the second conveying line and the third conveying line correspond to each other up and down. The discharging assembly is arranged in the third conveying line, and the outer end of the third conveying line is communicated with the discharging port.

[0031] The discharging assembly includes a shaft, a connecting shaft, a discharging plate and a fourth motor. Both ends of the shaft are rotatably mounted on the frame. The connecting shaft is coaxially fixed on the shaft. The number of the connecting shafts is consistent with the number of the third conveying lines, and the position of the connecting shaft corresponds to each third conveying line. There are multiple discharging plates, and the discharging plates are fixed on the outside of the connecting shaft in a circular array. The fourth motor is fixed to the outside of the frame, and the output shaft of the fourth motor is fixed to the conveying rod.

[0032] A discharging baffle is arranged in the third conveying line, both ends of which are fixed to the limiting plate, and a blocking opening is opened on the discharging baffle, so that the lobster comes into contact with the discharging plate after passing through the blocking opening.

[0033] By adopting the above technical solution, a single lobster is blocked by the discharge plate when passing through the barrier, and the single lobster is sent out from the discharge port through the rotation of the discharge plate.

[0034] The beneficial effects of the present invention are:

[0035] 1. The lobster weighing and grading are flexibly combined with the length grading screening. The lobsters are quickly and orderly graded and screened by size through the grading bin, and the lobster monomers can be smoothly matched with the weighing components for single weighing, so as to screen out high-quality lobsters that meet the length, size and weight standards, thereby improving the accuracy and functionality of lobster grading and screening. At the same time, individual screening and weighing screening can also be operated separately, thus meeting the operational needs under different production and screening situations. It has strong applicability and can improve the utilization rate and grading efficiency of the equipment;

[0036] 2. The lobsters are fed along the slope to the second guide plate, and the second guide plate is driven by the driving component and the transition component to move horizontally, so that the lobsters can fall onto the feed rod at the guide port to avoid the lobster feed blockage. The three upper and lower horizontal conveying lines on the grading bin are used to improve the orderliness of lobster conveying, reduce stacking, and improve the convenience and accuracy of screening;

[0037] 3. When the first frame rod rotates, it can drive multiple driving gears to rotate at the same time, so as to drive multiple sets of transition components and traction components to run simultaneously, thereby improving the convenience of displacement of the guide plate. At the same time, when the first traction arm is subjected to force, it can drive the traction block to rotate synchronously, so that the synchronous frame drives the guide plate to move along the arc surface, thereby realizing the displacement drive of the second guide plate, so that the second guide plate can be moved back and forth;

[0038] 4. The spacing between the conveying rods can be quickly adjusted by the push rod. By rotating the regulating wheel, the push rod drives the slider to slide in the horizontal groove, so that the spacing between the conveying rods can be flexibly reduced to meet the screening needs of different lobster sizes;

[0039] 5. When the slider moves, the lobsters are received at the discharging end through the receiving curtain, and the rotary rod can flexibly control the stretching length of the receiving curtain through the reset component, so that when the screening gap of the conveying rod is adjusted, the receiving curtain can always be located at the discharging end of the conveying rod to receive the material, thereby improving the stability of the lobster discharging effect;

[0040] 6. The limiting plate in the frame forms a third conveyor line, so that the lobsters can be discharged from the discharge port along the third conveyor line to the weighing assembly for weighing detection. When in use, the lobsters falling from the third conveyor line are blocked by the discharge plate, so that the lobsters can contact the discharge plate through the barrier, and the outermost lobsters are sent out of the discharge port for weighing by the rotation of the discharge plate, thereby ensuring the accuracy of weighing and facilitating the screening of lobsters that do not meet the weight standard. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 A schematic diagram of the structure of a lobster grading and screening machine provided by an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of the structure inside the grading bin in an embodiment of the present invention;

[0044] Figure 3 It is a schematic diagram of the structure of the driving component in an embodiment of the present invention;

[0045] Figure 4 It is a schematic diagram of the structure of the transition component in an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram of the structure of the screening control assembly in an embodiment of the present invention;

[0047] Figure 6 It is a schematic diagram of the structure of the conveying frame in an embodiment of the present invention;

[0048] Figure 7 A schematic diagram of the structure of a synchronization component in an embodiment of the present invention;

[0049] Figure 8 It is a schematic diagram of the structure of the discharge frame in an embodiment of the present invention.

[0050] In the figure, 1, weighing host; 2, grading bin; 3, first guide plate; 4, screening plate; 5, anti-blocking component; 6, screening control component; 7, discharge component; 8, receiving component; 9, discharge frame; 11, conveying component; 12, weighing component; 21, side plate; 22, discharge port; 23, support plate; 24, discharge port; 31, top plate; 32, slope; 33, guide plate; 34, guide frame; 35, guide port; 36, installation port; 41, support rod; 42, second guide plate; 43, convex strip; 44, slide column; 45, baffle; 46, first spring; 51, drive assembly; 52, transition assembly; 53, traction assembly; 511, first frame rod; 512, drive gear; 513, first motor; 521, driven gear; 522, push plate; 523, support frame; 524, push foot; 525, first traction arm; 526, second traction arm; 527, mounting plate; 528, second frame rod; 531, traction block; 532, arc surface; 533, synchronous frame; 534, third frame rod; 61, mounting slot; 62, regulating assembly ; 63, conveying frame; 611, vertical slot; 612, horizontal slot; 621, vertical frame; 622, horizontal frame; 623, push-pull frame; 624, regulating wheel; 625, second motor; 631, fixed block; 632, slider; 633, conveying rod; 634, push rod; 635, push ring; 636, second spring; 71, first transmission belt; 72, second transmission belt; 73, first support rod; 74, second support rod; 75, third motor; 76, synchronous assembly; 77, third transmission belt; 78, discharge plate; 711, sponge block; 761, first gear; 762, second gear; 763, third gear; 81, rotary rod; 82, curtain receiving; 83, curtain frame; 84, reset assembly; 841, fourth gear; 842, frame plate; 843, tooth groove; 844, bar; 845, support; 846, third spring; 91, frame; 92, limit plate; 93, discharging assembly; 94, discharging baffle; 95, baffle; 931, shaft; 932, connecting shaft; 933, discharging plate; 934, fourth motor. DETAILED DESCRIPTION

[0051] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The embodiment of the present invention specifically provides a lobster grading and screening machine, including a weighing main machine 1 and a grading bin 2. A conveying component 11 and a weighing component 12 are installed on the weighing main machine 1. The weighing component 12 is conveyed and moved by the conveying component 11, so that when the lobster is placed on the weighing component 12, the weight of the lobster can be automatically detected by the weighing component 12, and the lobster that does not meet the standard can be sent out of the weighing component 12. Since the weighing main machine 1 and its related weighing components are existing mature technologies, they are not described in detail here;

[0053] Among them, the grading bin 2 is fixedly mounted on the upper surface of the weighing host 1, and a first guide plate 3 and a screen plate 4 are arranged on the top of the grading bin 2. After the lobsters are poured onto the first guide plate 3, they are sent into the grading bin 2 along the screen plate 4 for grading treatment. The outer side of the screen plate 4 is connected with the anti-blocking component 5, so that the lobsters can be prevented from being blocked by the anti-blocking component 5. A screening control component 6 for size grading and screening the lobsters is installed inside the grading bin 2. The size of the sieve opening of the screening control component 6 can be flexibly adjusted. The outer side of the screening control component 6 is connected with the discharge component 7, and the lobsters are screened and transported on the screening control component 6 through the discharge component 7. A receiving component 8 and a discharge frame 9 are also arranged inside the grading bin 2. After being screened by the screening control component 6, the lobsters fall into the discharge frame 9 through the receiving component 8, and are finally received and weighed one by one by the corresponding weighing components 12.

[0054] For further information, please refer to Figure 2 and Figure 3 The first guide plate 3 includes a top plate 31, a slope 32, a guide plate 33, a guide frame 34 and a guide port 35. The outer side of the top plate 31 is fixed to the grading bin 2. The slope 32 is arranged on the upper surface of the top plate 31, so that after the lobsters are poured into the surface of the top plate 31, they can slide and fall along the slope 32 toward the guide plate 33. The guide plates 33 are fixedly arranged on the upper surface of the slope 32 at intervals. A first conveying line for separating and conveying lobsters is formed between adjacent guide plates 33, so that the lobster groups can be discharged and screened through the conveying line to reduce the stacking of lobsters, so as to improve the orderliness and accuracy of lobster screening. The guide frame 34 is fixedly installed at one end of the top plate 31 close to the screening plate 4, and the guide port 35 is opened on the guide frame 34. After the lobsters slide down the slope 32 to the position of the guide port 35, the guide port 35 is a rectangular structure, so that when the lobsters pass through the guide port 35, the stacking can be reduced and they can be sent one by one into the grading bin 2 for screening.

[0055] The screening plate 4 includes a support rod 41, a second guide plate 42, a convex strip 43, a slide column 44, a baffle plate 45 and a first spring 46. The outer side of the support rod 41 is fixed to the second guide plate 42. The second guide plate 42 is tilted as a whole. The lobster falls on the surface of the second guide plate 42 along the slope 32. The convex strips 43 are arranged and fixed on the upper surface of the second guide plate 42. The setting direction of the convex strips 43 is parallel to the height direction of the second guide plate 42, so that when the second guide plate 42 moves horizontally to the left and right, it can apply force to the lobster through the convex strips 43 to help the lobsters to be screened. After the lobsters are sent to the second guide plate 42 along the slope 32, the lateral vibration of the second guide plate 42 improves the convenience of the lobsters passing through the guide port 35, and prevents the lobsters from being blocked at the guide port 35.

[0056] The material of the convex strip 43 is silicone or rubber, which is soft and elastic. It can effectively apply force to the lobster to help feed while avoiding hurting the lobster.

[0057] During implementation, the slide column 44 is fixed at both ends of the support rod 41, and the support rod 41 is linearly slidably matched with the grading bin 2 through the slide column 44, so that the second guide plate 42 slides with the grading bin 2 through the slide column 44 when moving, and the baffle plate 45 is coaxially fixed on the outside of the slide column 44. A first spring 46 for resetting is provided between the baffle plate 45 and the grading bin 2, so that when the slide column 44 slides, the baffle plate 45 is driven to slide and reset through the spring 46, so that the slide column 44 and the second guide plate 42 can be reset synchronously.

[0058] The outer contour of the slide post 44 is a polygonal structure, so that the sliding mode of the slide post 44 on the grading bin 2 is limited to horizontal linear sliding, thereby preventing the slide post 44 from rotating on the grading bin 2 and affecting the use effect of the second guide plate 42.

[0059] For further information, please refer to Figure 2 The anti-blocking component 5 includes a driving component 51, a transition component 52 and a traction component 53. The driving component 51 is installed on the grading bin 2, the transition component 52 is connected to the outer side of the driving component 51, and the traction component 53 is arranged between the transition component 52 and the second guide plate 42, so that the traction component 53 drives the second guide plate 42 to move back and forth in the length direction, so that the reciprocating movement of the second guide plate 42 drives the convex strips 43 to provide discharge combing vibration to the lobsters, thereby helping the lobsters to be discharged downward from the guide port 35 more smoothly.

[0060] For details, please refer to Figure 3The driving assembly 51 includes a first frame rod 511, a driving gear 512 and a first motor 513. Both ends of the first frame rod 511 are rotatably mounted on the grading bin 2. The driving gear 512 is coaxially fixed on the first frame rod 511. The first motor 513 is fixed on the outer side of the grading bin 2. The output shaft of the first motor 513 is fixed to the first frame rod 511, so that the first frame rod 511 is driven to rotate by the first motor 513, and the driving gear 512 is rotated synchronously.

[0061] Please refer to Figure 4 The transition assembly 52 includes a driven gear 521, a push plate 522, a support frame 523 and a push pin 524. The outer side of the driven gear 521 is meshed with the driving gear 512, so that the driving gear 512 can drive the driven gear 521 to rotate synchronously. One end of the push plate 522 is fixed to the axis of the driven gear 521, and the other end is rotatably connected to the support frame 523. The push pin 524 is fixed to the bottom end of the support frame 523, so that the push plate 522 can pull the top end of the support frame 523 after rotation, so that the support frame 523 can achieve reciprocating motion of downward or upward displacement;

[0062] The front and rear ends of the push foot 524 are rotatably connected to the first pulling arm 525 and the second pulling arm 526 respectively, so that when the support frame 523 is pulled by the pushing plate 522, the push foot 524 can rotate on the first pulling arm 525 and the second pulling arm 526, so that the support frame 523 can stably move downward or upward, and the ends of the first pulling arm 525 and the second pulling arm 526 away from the push foot 524 are rotatably connected to the grading bin 2 and the traction assembly 53 respectively, so that the first pulling arm 525 can be stably installed and rotated on the grading bin 2, so that when the push frame 524 moves downward with the support frame 523, downward pressure can be applied to the first pulling arm 525 and the second pulling arm 526, so that the inner ends of the first pulling arm 525 and the second pulling arm 526 move downward, so that the other end of the second pulling arm 526 pulls the traction assembly 53;

[0063] The outer side of the driven gear 521 is rotatably mounted on the mounting plate 527, so that the driven gear 521 can rotate stably. The outer end of the mounting plate 527 is fixed to the second frame rod 528, so that the driven gear 521 is provided with stable mounting support through the mounting plate 527. Both ends of the second frame rod 528 are fixed on the grading bin 2, so that the entire transition assembly 52 can be stably installed.

[0064] The traction assembly 53 includes a traction block 531, an arc surface 532, a synchronous frame 533 and a third frame rod 534. The bottom end of the traction block 531 is rotatably connected to the second traction arm 526, so that when the front end of the second traction arm 526 moves downward, the rear end can pull the traction block 531 forward, so that the traction block 531 rotates forward clockwise as a whole. The arc surface 532 is arranged on the outside of the traction block 531, and the cross-section of the outer side of the arc surface 532 is an arc surface. The rear end of the synchronous frame 533 is fixed to the second guide plate 42, and the front end of the synchronous frame 533 is in sliding contact with the arc surface 532. The synchronous frame 533 is an L-shaped structure as a whole. When the traction block 531 rotates forward, it will drive the arc surface 532 to slide and contact with the synchronous frame 533, so that the synchronous frame 533 drives the second material guide plate 42 to move leftward along the arc surface 532 after being subjected to force. Through the elastic force of the first spring 46, the synchronous frame 533 can always fit with the undulating arc surface 532, so that the second material guide plate 42 can achieve left-right displacement, and when the second pulling arm 526 follows the support frame 523 to reset, the arc surface 532 repeatedly applies force to the synchronous frame 533, so that the second material guide plate 42 repeatedly moves left-right, so as to achieve the effect of combing the lobster material and avoiding clogging on the guide port 35;

[0065] The top end of the traction block 531 is rotatably disposed on the third frame rod 534 , and both ends of the third frame rod 534 are fixedly connected to the grading bin 2 , so that the traction block 531 can stably rotate with the third frame rod 534 as a fulcrum.

[0066] It is worth mentioning that the number of transition components 52 and traction components 53 is set at one, two or more than two, and the length of the push plate 522 is smaller than the radius of the driven gear 521 to avoid jamming between the push plate 522 and the driving gear 512. The number of driving gears 512 matches the number of transition components 52 and traction components 53, so that multiple groups of transition components 52 and traction components 53 can be driven by the driving gear 512 to realize operation, so as to improve the convenience of driving the reciprocating movement of the second guide plate 42.

[0067] For further information, please refer to Figure 2 and Figure 5 The screening control component 6 includes a mounting groove 61, a regulating component 62 and a conveying rack 63. The mounting groove 61 is opened inside the grading bin 2. The regulating component 62 is connected to the inner wall of the mounting groove 61. The conveying rack 63 is installed in the mounting groove 61. The lobsters are transported and graded by the conveying rack 63.

[0068] Specifically, a mounting opening 36 is provided at the bottom end of the top plate 31, and the mounting groove 61 includes a vertical groove 611 and a horizontal groove 612 which are connected to each other, the vertical groove 611 is parallel to the height direction of the grading bin 2, and the horizontal groove 612 is parallel to the width direction of the grading bin 2;

[0069] The regulating assembly 62 includes a vertical frame 621, a horizontal frame 622, a push-pull frame 623, a regulating wheel 624 and a second motor 625. The upper and lower ends of the vertical frame 621 slide along the vertical groove 611, and the two ends of the horizontal frame 622 are fixed to the vertical frame 621. The push-pull frame 623 is fixed to the outside of the horizontal frame 622. The outside of the regulating wheel 624 is in sliding contact with the inner wall of the push-pull frame 623. The outside of the second motor 625 is fixed in the installation opening 36, and the output shaft of the second motor 625 passes through the installation opening 36 and is fixed to the regulating wheel 624, so that the regulating wheel 624 is driven to rotate by the second motor 625, so that the regulating wheel 624 can gradually apply thrust to the push-pull frame 623 during the rotation process, so that the push-pull frame 623 applies force to the vertical frame 621 through the horizontal frame 622, so that the vertical frame 621 can slide along the vertical groove 611 toward the direction of the second guide plate 42;

[0070] Please refer to Figure 5 and Figure 6 The conveying frame 63 includes a fixed block 631, a slider 632, a conveying rod 633, a push rod 634, a push ring 635 and a second spring 636. The fixed block 631 is fixedly mounted on the inner side of the transverse groove 612. The outer side of the slider 632 is linearly slidably matched with the transverse groove 612. The number of sliders 632 is equidistantly arranged at two or more locations in the transverse groove 612. Both ends of the conveying rod 633 are rotatably mounted on the fixed block 631 and the slider 632. After the lobster passes through the guide port 35, it falls on the surface of the conveying rod 633. Except for the conveying rod 633 mounted on the fixed block 631, which is in a fixed position, the conveying rods 633 mounted on the slider 632 can adjust the horizontal position following the slider 632. By adjusting the spacing between the sliders 632, the spacing between the conveying rods 633 can be adjusted. When the lobster falls on the conveying rod 633 for conveying, the smaller lobster can fall out along the gap between the conveying rods 633, while the larger lobster continues to be conveyed.

[0071] During implementation, one end of the push rod 634 is slidably matched with the inside of the fixed block 631, and the other end is fixedly mounted on the vertical frame 621, so that when the vertical frame 621 moves toward the direction of the second guide plate 42, the push rod 634 can be pushed to slide into the fixed block 631, the axial direction of the push rod 634 is kept parallel to the length direction of the transverse groove 612, the outer side of the push rod 634 is slidably connected with the inside of the slider 632, the push ring 635 is coaxially fixed to the outer side of the push rod 634, the outer side of the push ring 635 is in contact with the slider 632, and the push rod 634 pushes the slider 632 through the push ring 635, so that when the push rod 634 slides under force, it can drive the slider 32 and the fixed block 631, and the sliders 632 and the sliders 632 to move closer to each other, thereby reducing the spacing between the conveying rods 633 at the same time to adjust the lobster size screening needs;

[0072] Among them, a second spring 636 is provided between the slider 632 and the fixed block 631, and between the sliders 632 and the sliders 632, so that when the regulating wheel 624 is reset and rotated, driving the push rod 634 to reset, the slider 632 can be synchronously reset through the second spring 636, so that the conveying rod 633 can be reset, so that the sieve mouth can be opened, thereby flexibly adjusting the size of the sieve mouth for lobster screening to meet the screening needs in different situations.

[0073] For further information, please refer to Figure 2 , Figure 5 and Figure 6 The discharge assembly 7 includes a first transmission belt 71, a second transmission belt 72, a first support rod 73, a second support rod 74, a third motor 75 and a synchronous assembly 76. A sponge block 711 is fixedly arranged on the surface of the first transmission belt 71. The first transmission belt 71 is arranged in the middle part above the conveying rod 633, so that when the lobster is fed onto the conveying rod 633, the sponge block 711 is driven to rotate by the belt body of the first transmission belt 71, and the sponge block 711 is in flexible contact with the lobster, and the lobster is pushed to move on the conveying rod 633;

[0074] The second transmission belt 72 is disposed at the left and right ends above the conveying rod 633. The belt body of the second transmission belt 72 contacts the surface of the conveying rod 633, so that the belt body of the second transmission belt 72 can drive the conveying rod 633 to rotate during transmission, so as to facilitate the conveying and screening of lobsters on the conveying rod 633, and facilitate the conveying and screening of lobsters.

[0075] The first support rod 73 and the second support rod 74 are coaxially fixed on the transmission wheels of the first transmission belt 71 and the second transmission belt 72. The outer sides of the first support rod 73 and the second support rod 74 are rotatably connected to the grading bin 2. The first support rod 73 and the second support rod 74 provide rotation support for the first transmission belt 71 and the second transmission belt 72. When installed, the first support rod 73 and the second support rod 74 are coaxially fixed with the transmission wheel parts of the first transmission belt 71 and the second transmission belt 72. The third motor 75 is fixed on the outer side of the grading bin 2, and the output shaft of the third motor 75 is fixed to the first support rod 73, so as to provide the first transmission belt 71 with a running driving force through the third motor 75;

[0076] The first support rod 73 and the second support rod 74 are matched with each other through the synchronous assembly 76, so that the first transmission belt 71 can drive the second transmission belt 72 to run, and the transmission directions of the first transmission belt 71 and the second transmission belt 72 are consistent, so that after the surface of the conveying rod 633 contacts the belt body of the second transmission belt 72, the rotation direction of the conveying rod 633 can be kept the same as the conveying direction of the sponge block 711 of the first transmission belt 71, which is convenient for the transportation of lobsters;

[0077] A third transmission belt 77 is provided below the first transmission belt 71. The third transmission belt 77 is located below the conveying rod 633 to convey the sifted lobsters outward, so that the smaller lobsters fall from the gaps of the conveying rod 633 onto the third transmission belt 77 and are conveyed to the outside of the grading bin 2 through the third transmission belt 77.

[0078] It is worth noting that the first transmission belt 71, the second transmission belt 72 and the third transmission belt 77 are all existing mature transmission belt structures. The power source of the third transmission belt 77 comes from the transmission belt motor installed thereon. Since the relevant technology is relatively mature, it will not be described in detail here.

[0079] Please refer to Figure 7 The synchronization component 76 includes a first gear 761, a second gear 762 and a third gear 763. The first gear 761 and the third gear 763 do not contact each other and are coaxially fixed on the first support rod 73 and the second support rod 74 respectively. The second gear 762 is rotatably installed on the outer side of the grading bin 2, and the outer side of the second gear 762 is meshed with the first gear 761 and the third gear 763, so that when the first support rod 73 rotates, it drives the first gear 761 to rotate synchronously, and transmits the transmission to the third gear 763 through the second gear 762, so that the second support rod 74 can maintain the same direction of rotation as the first support rod 73, so that the first transmission belt 71 and the second transmission belt 72 can maintain the same direction of transmission.

[0080] For further information, please refer to Figure 5 and Figure 6 The receiving assembly 8 includes a rotating rod 81, a receiving curtain 82, a curtain frame 83 and a reset assembly 84. Both ends of the rotating rod 81 are rotatably mounted on the grading bin 2. The bottom end of the receiving curtain 82 is fixed to the grading bin 2, and the top end of the receiving curtain 82 is fixed on the curtain frame 83. The receiving curtain 82 is wound on the rotating rod 81, and the number of winding layers of the receiving curtain 82 is not less than 3 layers, so that when the top end of the receiving curtain 82 is subjected to force, the rotating rod 81 can be driven to rotate, so that the receiving curtain 82 can be stretched;

[0081] Specifically, both ends of the curtain frame 83 are fixed to the slider 632, and the slider 632 is the slider 632 farthest from the second material guide plate 42, that is, the slider 632 is the slider 632 at the material discharge position. When the conveying rod 633 reduces the gap, the slider 632 at the material discharge position can drive the receiving curtain 82 to move synchronously, so that the lobster can always be caught by the receiving curtain 82 and slide down along the surface of the receiving curtain 82 for conveyance;

[0082] The reset assembly 84 is arranged outside the grading bin 2 to drive the rotary rod 81 to reset and rotate, so that when the slider 632 and the conveying rod 633 are reset, the receiving curtain 82 can be rolled up by the reset rotary rod 81, so that the length of the receiving curtain 82 always matches the position of the slider 632 and is maintained at a certain distance;

[0083] For details, please refer to Figure 7 The reset assembly 84 includes a fourth gear 841, a frame plate 842, a tooth groove 843, a bar 844, a support 845 and a third spring 846. The fourth gear 841 is coaxially fixed to the outer end of the rotating rod 81, the frame plate 842 is arranged on the outer side of the grading bin 2, and the tooth groove 843 is arranged on the side of the frame plate 842 close to the fourth gear 841. The frame plate 842 is meshed with the fourth gear 841 through the tooth groove 843. When the rotating rod 81 rotates, it will drive the fourth gear 841 to rotate synchronously, so that the fourth gear 841 drives the frame plate 842 to move upward through the tooth groove 843;

[0084] The top end of the bar 844 is slidably connected to the frame 842, and the bottom end of the bar 844 is fixedly connected to the support 845. The third spring 846 is arranged between the frame 842 and the support 845. The two ends of the third spring 846 are kept fixed to the frame 842 and the support 845. After the receiving curtain 82 is relaxed, the frame 842 can be kept in the reset state driven by the third spring 846, so that the fourth gear 841 is reset and rotated, driving the rotating rod 81 to reset and rotate to roll up the receiving curtain 82.

[0085] For further information, please refer to Figure 1 and Figure 5 A plurality of side plates 21 are arranged and fixed on the inner wall of the grading bin 2. The side plates 21 are located between the conveying rod 633 and the first transmission belt 71. A second conveying line corresponding to the first conveying line is formed between adjacent side plates 21, so that the lobsters can be diverted, conveyed and screened along the first conveying line and the second conveying line arranged in parallel, thereby reducing the accumulation of lobsters and improving the orderliness of lobster screening and grading. The number and position of the sponge blocks 711 correspond to each second conveying line, so as to push and transport the lobsters in the second conveying line.

[0086] A discharge port 22 and a discharge port 24 are provided on the outside of the grading bin 2. A discharge plate 78 is fixedly mounted on the inner wall of the discharge port 22. The discharge plate 78 corresponds to the discharge position of the third transmission belt 77, so that the sieved lobsters can be sent out along the discharge plate 78. A support plate 23 is provided below the discharge port 22. The support plate 23 is fixed to the outer wall of the grading bin 2 so that a collection frame for receiving lobsters that do not meet the standards can be placed on the support plate 23. The position of the discharge port 24 corresponds to the weighing assembly 12 so that the lobsters that meet the standards can be sent out through the discharge port 24 alone and fall into the weighing assembly 12 for secondary inspection.

[0087] For further information, please refer to Figure 2 and Figure 8The discharging frame 9 includes a frame body 91, a limiting plate 92 and a discharging assembly 93. The frame body 91 is fixed inside the grading bin 2 and is located below the conveying rod 633. Both ends of the third transmission belt 77 are mounted on the frame body 91. The limiting plates 92 are arranged and fixed inside the frame body 91. The limiting plates 92 are fixed to the inner wall of the grading bin 2 so that the lobsters can be stably diverted and conveyed along the limiting plates 92 after sliding along the receiving curtain 82.

[0088] Among them, a third conveyor line is formed between adjacent limiting plates 92, the positions of the first conveyor line, the second conveyor line and the third conveyor line correspond to each other up and down, and the discharging assembly 93 is arranged in the third conveyor line to discharge the lobsters through the discharging assembly 93. The outer end of the third conveyor line is connected to the discharging port 24, and the position of the third conveyor line near the discharging port 24 is inclined to facilitate the outward delivery of the lobsters;

[0089] Specifically, the discharging assembly 93 includes a shaft 931, a connecting shaft 932, a discharging plate 933 and a fourth motor 934. Both ends of the shaft 931 are rotatably mounted on the frame 91. The connecting shaft 932 is coaxially fixed on the shaft 931. The number of connecting shafts 932 is consistent with the number of third conveying lines, and the position of the connecting shaft 932 corresponds to each third conveying line. There are multiple discharging plates 933, and the discharging plates 933 are fixed on the outside of the connecting shaft 932 in a circular array. The fourth motor 934 is fixed to the outside of the frame 91, and the output shaft of the fourth motor 934 is fixed to the conveying rod 633. When the lobster row falls into the third conveying line, the lobster is sent out from the discharging port 24 by the rotating discharging plate 933.

[0090] During implementation, a discharge baffle 94 is provided in the third conveyor line, and both ends of the discharge baffle 94 are fixed to the limit plate 92, and a baffle 95 is provided on the discharge baffle 94. After the lobsters are fed into the third conveyor line, the inner side of the discharge baffle 94 is a conical shrinkage structure, so that the lobsters at the outermost end pass through the baffle 95 and come into contact with the discharge plate 933. The discharge plate 933 is made of a flexible material, preferably rubber, and can come into contact with the discharge baffle 94 when rotating, and pass through the discharge baffle 94 after deformation, and stay at the outer end of the baffle 95. By setting the discharge plate 933 The number and rotation speed of the weighing assembly 12 can be adjusted so that a single lobster is blocked by the discharging plate 933 when passing through the barrier 95, and the discharging plate 933 is rotated so that the single lobster is sent out from the discharging port 24, and the discharging plate 933 moves downward to stay outside the barrier 95, and the next lobster slides to the barrier 95, and so on. It can cooperate with the weighing assembly 12 quickly to discharge a single qualified lobster, and then perform a secondary inspection by the weighing assembly 12 to achieve multi-level inspection, so as to obtain high-quality lobsters that meet the requirements of size and weight, reduce the time of re-selection, and improve the convenience of screening.

[0091] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lobster grading and screening machine, comprising a weighing main machine (1), on which a conveying component (11) and a weighing component (12) are mounted, and the weighing component (12) is conveyed and moved by the conveying component (11); Features: The weighing machine also comprises a grading bin (2), which is fixedly mounted on the upper surface of the weighing main machine (1), and a first material guide plate (3) and a screening plate (4) are arranged on the top of the grading bin (2). After the lobsters are poured onto the first material guide plate (3), they are sent along the screening plate (4) into the grading bin (2) for grading treatment. The outer side of the screening plate (4) is connected to an anti-blocking component (5) so that the lobsters can be prevented from being blocked by the anti-blocking component (5). The grading bin (2) is equipped with a material filter for screening the lobsters by size. A screening component (6) having a sieve opening size that can be flexibly adjusted, the outer side of the screening component (6) is connected to a discharge component (7), and the lobsters are screened and transported on the screening component (6) through the discharge component (7), and a receiving component (8) and a discharge frame (9) are also provided inside the grading bin (2), and after being screened by the screening component (6), the lobsters fall into the discharge frame (9) through the receiving component (8), and are finally received and weighed one by one by corresponding weighing components (12); The first guide plate (3) comprises a top plate (31), a slope (32), a guide plate (33), a guide frame (34) and a guide opening (35); the outer side of the top plate (31) is fixed to the grading bin (2); the slope (32) is arranged on the upper surface of the top plate (31); the guide plates (33) are fixedly arranged on the upper surface of the slope (32) at intervals; a first conveying line for separating and conveying lobsters is formed between adjacent guide plates (33); the guide frame (34) is fixedly mounted on one end of the top plate (31) close to the screening plate (4); and the guide opening (35) is opened on the guide frame (34); The screening plate (4) comprises a support rod (41), a second guide plate (42), a convex strip (43), a slide column (44), a baffle plate (45) and a first spring (46). The outer side of the support rod (41) is fixed to the second guide plate (42). The second guide plate (42) is tilted as a whole. The lobster falls on the surface of the second guide plate (42) along the slope (32). The convex strips (43) are arranged and fixed on the upper surface of the second guide plate (42). The slide column (44) is fixed on both ends of the support rod (41). The support rod (41) is linearly slidably matched with the grading bin (2) through the slide column (44). The baffle plate (45) is coaxially fixed to the outer side of the slide column (44). A first spring (46) for resetting is arranged between the baffle plate (45) and the grading bin (2). The outer contour of the slide column (44) is a polygonal structure. The anti-blocking component (5) comprises a driving component (51), a transition component (52) and a traction component (53); the driving component (51) is mounted on the grading bin (2); the transition component (52) is connected to the outside of the driving component (51); and the traction component (53) is arranged between the transition component (52) and the second material guide plate (42) so as to drive the second material guide plate (42) to move back and forth in the length direction through the traction component (53); The driving assembly (51) comprises a first frame rod (511), a driving gear (512) and a first motor (513); both ends of the first frame rod (511) are rotatably mounted on the grading bin (2); the driving gear (512) is coaxially fixed on the first frame rod (511); the first motor (513) is fixed on the outside of the grading bin (2); and the output shaft of the first motor (513) is fixed to the first frame rod (511); The transition assembly (52) comprises a driven gear (521), a push plate (522), a support frame (523) and a push pin (524). The outer side of the driven gear (521) is meshed with the driving gear (512). One end of the push plate (522) is fixed to the axis of the driven gear (521), and the other end is rotatably connected to the support frame (523). The push pin (524) is fixed to the bottom end of the support frame (523). The front and rear ends of the push pin (524) are respectively connected to the first traction gear (512). The arm (525) and the second pulling arm (526) are rotatably connected, and the ends of the first pulling arm (525) and the second pulling arm (526) away from the pushing foot (524) are rotatably connected to the grading bin (2) and the traction assembly (53) respectively. The outer side of the driven gear (521) is rotatably mounted on the mounting plate (527), and the outer end of the mounting plate (527) is fixed to the second frame rod (528), and the two ends of the second frame rod (528) are fixed on the grading bin (2); The traction assembly (53) comprises a traction block (531), an arc surface (532), a synchronous frame (533) and a third frame rod (534); the bottom end of the traction block (531) is rotatably connected to the second traction arm (526); the arc surface (532) is arranged outside the traction block (531); the rear end of the synchronous frame (533) is fixed to the second material guide plate (42); the front end of the synchronous frame (533) is in sliding contact with the arc surface (532); the top end of the traction block (531) is rotatably arranged on the third frame rod (534); and both ends of the third frame rod (534) are fixedly connected to the grading bin (2).

2. A lobster grading and screening machine according to claim 1, characterized in that: The screening control component (6) comprises a mounting groove (61), a regulating component (62) and a conveying frame (63); the mounting groove (61) is arranged on the inner side of the grading bin (2); the regulating component (62) is connected to the inner wall of the mounting groove (61); and the conveying frame (63) is installed in the mounting groove (61); A mounting opening (36) is provided at the bottom end of the top plate (31); the mounting groove (61) comprises a vertical groove (611) and a horizontal groove (612) which are interconnected; the regulating assembly (62) comprises a vertical frame (621), a horizontal frame (622), a push-pull frame (623), a regulating wheel (624) and a second motor (625); the upper and lower ends of the vertical frame (621) slide along the vertical groove (611); the two ends of the horizontal frame (622) are fixed to the vertical frame (621); the push-pull frame (623) is fixed to the outer side of the horizontal frame (622); the outer side of the regulating wheel (624) is in sliding contact with the inner wall of the push-pull frame (623); the outer side of the second motor (625) is fixed in the mounting opening (36); and the output shaft of the second motor (625) passes through the mounting opening (36) and is fixed to the regulating wheel (624); The conveying frame (63) comprises a fixed block (631), a slider (632), a conveying rod (633), a push rod (634), a push ring (635) and a second spring (636). The fixed block (631) is fixedly mounted on the inner side of the transverse groove (612). The outer side of the slider (632) is linearly slidably matched with the transverse groove (612). The number of the sliders (632) is equidistantly arranged at two or more locations in the transverse groove (612). Both ends of the conveying rod (633) are rotatably mounted on the fixed block (631) and the slider (634). 2), one end of the push rod (634) is slidably matched with the inside of the fixed block (631), and the other end is fixedly mounted on the vertical frame (621), the outer side of the push rod (634) is slidably connected with the inside of the slider (632), the push ring (635) is coaxially fixed to the outer side of the push rod (634), the push rod (634) pushes the slider (632) through the push ring (635), and a second spring (636) is provided between the slider (632) and the fixed block (631) and between the sliders (632) and the sliders (632).

3. A lobster grading and screening machine according to claim 2, characterized in that: The discharge assembly (7) comprises a first transmission belt (71), a second transmission belt (72), a first support rod (73), a second support rod (74), a third motor (75) and a synchronous assembly (76); a sponge block (711) is fixedly arranged on the surface of the first transmission belt (71); the first transmission belt (71) is arranged at the middle part above the conveying rod (633); the second transmission belt (72) is arranged at the left and right ends above the conveying rod (633); the transmission wheels of the first transmission belt (71) and the second transmission belt (72) are both coaxially fixedly equipped with the first support rod (73) and a second support rod (74), the first support rod (73) and the second support rod (74) are rotatably connected to the grading bin (2) at their outer sides, the third motor (75) is fixedly mounted on the outer side of the grading bin (2), and the output shaft of the third motor (75) is fixed to the first support rod (73), the first support rod (73) and the second support rod (74) are transmission-coordinated via a synchronization assembly (76), a third transmission belt (77) is arranged below the first transmission belt (71), and the third transmission belt (77) is located below the conveying rod (633) to deliver the screened lobsters outward; The synchronization assembly (76) comprises a first gear (761), a second gear (762) and a third gear (763); the first gear (761) and the third gear (763) do not contact each other and are coaxially fixed on the first support rod (73) and the second support rod (74), respectively; the second gear (762) is rotatably mounted on the outside of the grading bin (2), and the outside of the second gear (762) is meshed with the first gear (761) and the third gear (763).

4. A lobster grading and screening machine according to claim 3, characterized in that: The receiving assembly (8) comprises a rotating rod (81), a receiving curtain (82), a curtain frame (83) and a reset assembly (84); the two ends of the rotating rod (81) are rotatably mounted on the grading bin (2); the bottom end of the receiving curtain (82) is fixed to the grading bin (2); the top end of the receiving curtain (82) is fixed to the curtain frame (83); the two ends of the curtain frame (83) are fixed to the slider (632); and the reset assembly (84) is arranged on the outside of the grading bin (2) to drive the rotating rod (81) to reset and rotate; The reset assembly (84) comprises a fourth gear (841), a frame plate (842), a tooth groove (843), a bar (844), a support (845) and a third spring (846); the fourth gear (841) is coaxially fixed to the outer end of the rotating rod (81); the frame plate (842) is arranged on the outer side of the grading bin (2); the tooth groove (843) is arranged on a side of the frame plate (842) close to the fourth gear (841); the frame plate (842) is meshed with the fourth gear (841) through the tooth groove (843); the top end of the bar (844) is slidably connected to the frame plate (842); the bottom end of the bar (844) is fixedly connected to the support (845); and the third spring (846) is arranged between the frame plate (842) and the support (845).

5. A lobster grading and screening machine according to claim 4, characterized in that: A plurality of side plates (21) are arranged and fixedly arranged on the inner wall of the grading bin (2), the side plates (21) are located between the conveying rod (633) and the first transmission belt (71), and a second conveying line corresponding to the first conveying line is formed between adjacent side plates (21). A discharge port (22) and a discharge port (24) are provided on the outer side of the grading bin (2), a discharge plate (78) is fixedly installed on the inner wall of the discharge port (22), a support plate (23) is provided below the discharge port (22), and the position of the discharge port (24) corresponds to the weighing assembly (12); The discharging frame (9) comprises a frame body (91), a limiting plate (92) and a discharging assembly (93); the frame body (91) is fixedly arranged inside the grading bin (2), and the frame body (91) is located below the conveying rod (633); two ends of the third transmission belt (77) are mounted on the frame body (91); the limiting plates (92) are arranged and fixedly arranged inside the frame body (91); a third conveying line is formed between adjacent limiting plates (92); the positions of the first conveying line, the second conveying line and the third conveying line correspond to each other in the upper and lower parts; the discharging assembly (93) is arranged inside the third conveying line; and the outer end of the third conveying line is communicated with the discharging port (24); The discharge assembly (93) comprises a shaft (931), a connecting shaft (932), a discharge plate (933) and a fourth motor (934); both ends of the shaft (931) are rotatably mounted on the frame (91); the connecting shaft (932) is coaxially fixed on the shaft (931); the number of the connecting shafts (932) is consistent with the number of the third conveying lines, and the position of the connecting shaft (932) corresponds to each third conveying line; there are a plurality of discharge plates (933), and the discharge plates (933) are fixed on the outside of the connecting shaft (932) in a circular array; the fourth motor (934) is fixed to the outside of the frame (91), and the output shaft of the fourth motor (934) is fixed to the conveying rod (633); A discharge baffle (94) is provided in the third conveying line, and both ends of the discharge baffle (94) are fixed to the limit plate (92), and The discharging baffle plate (94) is provided with a baffle (95), and the lobsters come into contact with the discharging plate (933) after passing through the baffle (95).

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