A transmission device for a wide and narrow sorting machine

Abstract

The present invention discloses a transmission device for a wide and narrow sorting machine, relates to the field of sorting technology, and comprises a high and low screening unit, a transfer unit and a weight screening unit, wherein the transfer unit is installed at one side of the high and low screening unit, the weight screening unit is installed at one end of the high and low screening unit, a plurality of transport units are arranged below the weight screening unit, the high and low screening unit comprises a supporting frame, a transmission assembly is installed on the sub-control assembly, the transmission assembly is connected to the transfer unit, a spring-open assembly is arranged in the second fixed shell, two symmetrical spaces are arranged on the second fixed shell, weight detection assemblies are respectively arranged in the two spaces, a square hole is opened on the bottom end of the space, and the square hole corresponds to a transport unit. The present invention realizes sorting of objects of different heights, and can realize sorting of different speeds according to the height of the objects, thereby improving work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sorting, and in particular to a transmission device for a wide-narrow sorting machine. Background Art

[0002] Wide-narrow sorting machine, also known as size sorting machine or shape sorting machine, is a device used for automatic sorting of packages. It can automatically identify and sort packages to the correct exit or processing area according to their size, shape and characteristics. This equipment is widely used in logistics centers, express sorting centers and e-commerce warehouses. Wide-narrow sorting machine is a key automation equipment in the modern logistics industry. Its technical background integrates multiple advanced technologies and innovations in engineering fields.

[0003] When sorting is performed in a logistics center, manpower is often wasted, and multiple categories are sorted according to the characteristics of the packages. In addition, the package transportation process is slow, which greatly reduces the sorting efficiency. Therefore, the present invention provides a transmission device for a wide and narrow sorting machine. Summary of the invention

[0004] In view of the above technical problems, the present invention discloses a transmission device for a wide and narrow sorting machine, comprising a high and low screening unit, a transfer unit and a weight screening unit, wherein the transfer unit is installed on one side of the high and low screening unit, and the weight screening unit is installed at one end of the high and low screening unit. A plurality of transport units are arranged below the weight screening unit, and the high and low screening unit comprises a supporting frame, a sub-control component is installed on the supporting frame, a transmission component is installed on the sub-control component, and the transmission component is connected to the transfer unit. The weight screening unit comprises a fixed shell two, and the fixed shell two is fixedly installed on the supporting frame, and the fixed shell two is connected to the transfer unit. A pop-up component is arranged in the fixed shell two, and two symmetrical spaces are arranged on the fixed shell two, and weight detection components are respectively arranged in the two spaces. A square hole is opened at the bottom of the space, and the square hole corresponds to a transport unit.

[0005] Furthermore, the sub-control component includes a motor, which is fixedly mounted on a supporting frame, and a first spline groove is arranged on the output end of the motor. A hydraulic cylinder is fixedly mounted on one side of the motor, and a connecting plate is fixedly mounted on the cylinder arm of the hydraulic cylinder. A rotating shaft is rotatably mounted on the connecting plate, and splines matching the first spline groove are arranged on both ends of the rotating shaft.

[0006] Furthermore, the sub-control component also includes a keyway shaft 2, which is rotatably mounted on a support frame, and a keyway shaft 1 is rotatably mounted on the keyway shaft 2, and both the keyway shaft 1 and the keyway shaft 2 are provided with a first spline groove. The sub-control component also includes a rotating shaft 2 and a rotating shaft 3, which are both rotatably mounted on a support frame, and a large gear is fixedly mounted on the rotating shaft 2. The rotating shaft 2 is connected to the keyway shaft 1 through a belt 1, and the rotating shaft 3 is connected to the keyway shaft 2 through a belt 2, and a small gear 2 is fixedly mounted on the rotating shaft 3.

[0007] Furthermore, the transmission assembly includes a rotating shaft four and a rotating shaft five, and the rotating shaft four and the rotating shaft five are both rotatably mounted on a supporting frame. A pinion one is fixedly mounted on one end of the rotating shaft four, and the pinion one is meshed with a large gear. A pinion three is fixedly mounted on one end of the rotating shaft five, and the pinion three is meshed with a pinion two. A sliding groove is provided on the other end of the rotating shaft five. The rotating shaft four and the rotating shaft five are connected via a transmission belt one, and a second spline groove is provided on the sliding groove.

[0008] Furthermore, the transfer unit includes a fixed shell 1, which is connected to a fixed shell 2, which is connected to a supporting frame, and a rotating shaft 7 and a rotating shaft 6 are rotatably mounted on the fixed shell 1, and the rotating shaft 6 and the rotating shaft 7 are connected through a transmission belt 2. An inclined plate 1 is fixedly mounted on one side of the fixed shell 1, and the inclined plate 1 is connected to the supporting frame. A second spline groove identical to that on the motor is arranged on one end of the rotating shaft 6.

[0009] Furthermore, the transfer unit also includes a connecting component, which includes a key shaft 1, on which a spline 2 matching the second spline groove is provided, the key shaft 1 is connected to the high and low screening unit, the key shaft 1 is provided with a spring 2, the first end of the spring 2 is connected to the key shaft 1, one end of the key shaft 1 is fixedly connected to a conical connecting piece, the conical connecting piece is fixedly installed with a key shaft 2, the key shaft 2 is provided with a spline 2 matching the second spline groove, and the key shaft 2 is key-connected to one end of the rotating shaft 6.

[0010] Furthermore, the connection assembly also includes a hydraulic cylinder 2, the cylinder barrel of the hydraulic cylinder 2 is fixedly mounted on the fixed housing 1, a push block is fixedly mounted on the cylinder arm of the hydraulic cylinder 2, and the push block is in contact with the conical connection piece.

[0011] Furthermore, the weight detection component includes a plurality of visual sensors, which are evenly distributed in the space on the fixed shell 2. The weight detection component also includes a receiving plate 2, one end of which is rotatably installed in the square hole at the lower end of the space. Two symmetrically distributed telescopic parts 1 are arranged below the receiving plate 2. The telescopic parts 1 include a connecting tube and a connecting arm. The connecting tube is rotatably installed on the fixed shell 2, the connecting tube and the connecting arm are slidably connected, the connecting arm is rotatably installed on the receiving plate 2, an elastic part is arranged between the connecting arm and the connecting tube, the first end of the elastic part is fixedly installed on the connecting arm, and the second end of the elastic part is fixedly installed on the connecting tube.

[0012] Furthermore, the pop-up assembly includes two push plates 1, which are arranged alternately and connected by a connecting shaft, which is rotatably installed on the fixed shell 2, and the lower ends of the two push plates 1 respectively correspond to two symmetrical spaces on the fixed shell 2.

[0013] Furthermore, the transport unit includes a mobile shell, a plurality of evenly distributed wheels are fixedly mounted on the bottom end of the mobile shell, a receiving plate 1 is slidably mounted inside the mobile shell, a plurality of springs 1 are arranged on the receiving plate 1, the plurality of springs 1 are evenly distributed, a first end of the spring 1 is fixedly mounted on the receiving plate 1, and a second end of the spring 1 is fixedly mounted inside the mobile shell.

[0014] Compared with the prior art, the present invention has the following advantages: (1) The present invention is provided with a high and low screening unit, through which objects of different heights can be sorted, and sorting at different speeds can be achieved according to the height of the objects; (2) The present invention is provided with a transfer unit, through which the high and low screening unit and the transfer unit cooperate to achieve transportation of high objects, thereby improving work efficiency; (3) The present invention is provided with a weight screening unit, through which objects of different weights can be sorted, thereby improving sorting speed and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the structure of the transport unit of the present invention.

[0017] Figure 3 It is a partial structural schematic diagram of the transport unit of the present invention.

[0018] Figure 4 It is a schematic diagram of the structure of the high and low screening units of the present invention.

[0019] Figure 5 The structure of the high and low screening unit of the present invention is shown in FIG. Figure 1 .

[0020] Figure 6 The structure of the high and low screening unit of the present invention is shown in FIG. Figure 2 .

[0021] Figure 7 The schematic diagram of the high and low screening unit structure of the present invention is as follows: Figure 3 .

[0022] Figure 8 for Figure 7 A schematic diagram of the enlarged structure in the middle.

[0023] Fig. 9 It is a schematic diagram of the structure of the transfer unit of the present invention.

[0024] Fig.10 The schematic diagram of the partial structure of the transport unit of the present invention is shown in FIG. Figure 1 .

[0025] Fig.11 The schematic diagram of the partial structure of the transport unit of the present invention is shown in FIG. Figure 2 .

[0026] Fig.12 It is a schematic diagram of the structure of the weight screening unit of the present invention.

[0027] Fig.13 The weight screening unit of the present invention is a schematic diagram of the partial structure Figure 1 .

[0028] Fig.14 The weight screening unit of the present invention is a schematic diagram of the structure of the part Figure 2 .

[0029] Figure numerals: 1-transport unit; 2-high and low screening unit; 3-transfer unit; 4-weight screening unit; 101-mobile housing; 102-wheel; 103-receiving plate 1; 104-spring 1; 201-support frame; 202-motor; 203-hydraulic cylinder 1; 204-connecting plate; 205-rotating shaft 1; 206-keyway shaft 1; 207-belt 1; 208-rotating shaft 2; 209-large gear; 210-small gear 1; 211-rotating shaft 3; 212-belt 2; 213-keyway shaft 2; 214-small gear 2; 215-small gear 3; 216- Sorting chute; 217-transmission belt one; 218-rotation axis four; 219-rotation axis five; 220-sliding chute; 301-fixed shell one; 302-inclined plate one; 303-rotation axis six; 304-rotation axis seven; 305-transmission belt two; 306-hydraulic cylinder two; 307-key shaft one; 308-spring two; 309-conical connecting piece; 310-key shaft two; 311-pushing block; 401-fixed shell two; 402-cylinder; 403-spring three; 404-fixed plate; 405-telescopic piece one; 406-supporting plate two; 407-pushing plate one; 408-connecting shaft. DETAILED DESCRIPTION

[0030] Example: Figure 1-Figure 3 As shown, a transmission device for a wide and narrow sorting machine includes a high and low screening unit 2, a transfer unit 3 and a weight screening unit 4, the transfer unit 3 is installed on one side of the high and low screening unit 2, the weight screening unit 4 is installed at one end of the high and low screening unit 2, and four transport units 1 are arranged below the weight screening unit 4, the transport unit 1 includes a mobile shell 101, a plurality of evenly distributed wheels 102 are fixedly installed on the bottom end of the mobile shell 101, a receiving plate 103 is slidably installed inside the mobile shell 101, a plurality of springs 104 are arranged on the receiving plate 103, and the plurality of springs 104 are evenly distributed, a first end of the spring 104 is fixedly installed on the receiving plate 103, and a second end of the spring 104 is fixedly installed in the mobile shell 101.

[0031] like Figure 4-Figure 8 As shown, the high and low screening unit 2 includes a supporting frame 201, a sub-control component is installed on the supporting frame 201, a transmission component is installed on the sub-control component, the transmission component is connected to the transfer unit 3, the sub-control component includes a motor 202, the motor 202 is fixedly installed on the supporting frame 201, a first spline groove is arranged on the output end of the motor 202, a hydraulic cylinder 203 is fixedly installed on one side of the motor 202, a connecting plate 204 is fixedly installed on the cylinder arm of the hydraulic cylinder 203, a rotating shaft 205 is rotatably installed on the connecting plate 204, and a spline 1 matching the first spline groove is arranged on both ends of the rotating shaft 205.

[0032] The sub-control component also includes a keyway shaft 213, which is rotatably mounted on the support frame 201, and a keyway shaft 1 206 is rotatably mounted on the keyway shaft 213. Both the keyway shaft 1 206 and the keyway shaft 213 are provided with a first spline groove. The sub-control component also includes a rotating shaft 208 and a rotating shaft 3 211, which are both rotatably mounted on the support frame 201. A large gear 209 is fixedly mounted on the rotating shaft 208. The rotating shaft 208 is connected to the keyway shaft 1 206 via a belt 1 207, the rotating shaft 3 211 is connected to the keyway shaft 2 213 via a belt 2 212, and a small gear 214 is fixedly mounted on the rotating shaft 3 211.

[0033] The transmission assembly includes a rotating shaft 4 218 and a rotating shaft 5 219, both of which are rotatably mounted on the support frame 201, a small gear 210 is fixedly mounted on one end of the rotating shaft 4 218, and the small gear 210 is meshed with the large gear 209, a small gear 3 215 is fixedly mounted on one end of the rotating shaft 5 219, and the small gear 3 215 is meshed with the small gear 214, a sliding groove 220 is arranged on the other end of the rotating shaft 5 219, the rotating shaft 4 218 and the rotating shaft 5 219 are connected by a transmission belt 1 217, and a second spline groove is arranged on the sliding groove 220.

[0034] Place objects of different heights, widths and sizes on conveyor belt 1 217, start hydraulic cylinder 1 203, the cylinder arm of hydraulic cylinder 1 203 drives rotating shaft 1 205 to slide through connecting plate 204, rotating shaft 1 205 is key-connected with keyway shaft 2 213, start motor 202, the output end of motor 202 drives keyway shaft 2 213 to rotate through rotating shaft 1 205, keyway shaft 2 213 drives rotating shaft 3 211 to rotate through belt 2 212, rotating shaft 3 211 drives pinion 3 215 to rotate through pinion 2 214, pinion 3 215 drives rotating shaft 5 219 to move, rotating shaft 5 219 drives conveyor belt 1 217 to move, conveyor belt 1 217 drives objects of different heights, widths and sizes Movement, when high items pass through the sorting chute 216 and then slide into the transfer unit 3, low items slide into the weight screening unit 4 through the conveyor belt 217. When the conveyor belt 217 needs to move quickly, start the hydraulic cylinder 203. The cylinder arm of the hydraulic cylinder 203 drives the rotating shaft 205 to slide through the connecting plate 204. The rotating shaft 205 is key-connected with the keyway shaft 206. The keyway shaft 206 drives the rotating shaft 208 to rotate through the belt 207. The rotating shaft 208 drives the small gear 210 to move through the large gear 209. The small gear 210 drives the conveyor belt 217 to move through the rotating shaft 4 218. The conveyor belt 217 drives the rotating shaft 5 219 to rotate.

[0035] The transfer unit 3 includes a fixed shell 1 301, which is connected to a fixed shell 2 401, and the fixed shell 1 301 is connected to the support frame 201. A rotating shaft 7 304 and a rotating shaft 6 303 are rotatably installed on the fixed shell 1 301, and the rotating shaft 6 303 and the rotating shaft 7 304 are connected through a transmission belt 2 305. An inclined plate 1 302 is fixedly installed on one side of the fixed shell 1 301, and the inclined plate 1 302 is connected to the support frame 201. A second spline groove identical to that on the motor 202 is arranged on one end of the rotating shaft 6 303.

[0036] like Figure 9-11 As shown, the transfer unit 3 also includes a connecting component, which includes a key shaft 1 307, on which a spline 2 matching the second spline groove is arranged, the key shaft 1 307 is connected to the sliding groove 220, a spring 2 308 is arranged on the key shaft 1 307, the first end of the spring 2 308 is connected to the key shaft 1 307, the second end of the spring 2 308 is connected to the rotating shaft 5 219, a conical connecting piece 309 is fixedly connected to one end of the key shaft 1 307, a key shaft 2 310 is fixedly installed on the conical connecting piece 309, the key shaft 2 310 is provided with a spline 2 matching the second spline groove, and the key shaft 2 310 is key-connected to one end of the rotating shaft 6 303.

[0037] The connection assembly also includes a second hydraulic cylinder 306 , the cylinder barrel of the second hydraulic cylinder 306 is fixedly mounted on the fixed housing 1 301 , and a push block 311 is fixedly mounted on the cylinder arm of the second hydraulic cylinder 306 , and the push block 311 is in contact with the conical connection piece 309 .

[0038] The high objects slide down onto the conveyor belt 2 305 through the inclined plate 1 302, and the hydraulic cylinder 2 306 is started. The cylinder arm of the hydraulic cylinder 2 306 retracts, and the cylinder arm of the hydraulic cylinder 2 306 drives the push block 311 to move, and the push block 311 is out of contact with the conical connector 309. The elastic force of the spring 2 308 drives the conical connector 309 to move through the key shaft 1 307, and the conical connector 309 drives the key shaft 2 310 to move. The key shaft 2 310 is connected with the key of the rotating shaft 6 303, and the rotating shaft 5 219 drives the rotating shaft 6 303 to rotate through the connecting assembly, and the rotating shaft 6 319 is rotated. 03 drives the conveyor belt 2 305 to move, and the conveyor belt 2 305 drives the high objects to slide into the weight screening unit 4. When there are no high objects, the hydraulic cylinder 2 306 is started, and the cylinder arm of the hydraulic cylinder 2 306 is extended. The cylinder arm of the hydraulic cylinder 2 306 drives the push block 311 to move, and the push block 311 contacts the conical connecting piece 309. The cylinder arm of the hydraulic cylinder 2 306 continues to extend, and the push block 311 compresses the spring 2 308 through the conical surface on the conical connecting piece 309. At this time, the key shaft 2 310 is disconnected from the rotating shaft 6 303.

[0039] like Figure 12-14As shown, the weight screening unit 4 includes a fixed shell 401, which is fixedly mounted on the supporting frame 201. The fixed shell 401 is connected to the fixed shell 301. A pop-up component is arranged in the fixed shell 401. Two symmetrical spaces are arranged on the fixed shell 401. Weight detection components are arranged in the two spaces respectively. A square hole is opened on the bottom of the space, and the square hole corresponds to a mobile shell 101.

[0040] The weight detection component includes multiple visual sensors, which are evenly distributed in the space on the fixed shell 401. The weight detection component also includes a receiving plate 406. One end of the receiving plate 406 is rotatably installed in the square hole at the lower end of the space. Two symmetrically distributed telescopic parts 405 are arranged below the receiving plate 406. The telescopic part 405 includes a connecting tube and a connecting arm. The connecting tube is rotatably installed on the fixed shell 401. The connecting tube and the connecting arm are slidably connected. The connecting arm is rotatably installed on the receiving plate 406. An elastic part is arranged between the connecting arm and the connecting tube. The first end of the elastic part is fixedly installed on the connecting arm, and the second end of the elastic part is fixedly installed on the connecting tube.

[0041] The pop-up assembly includes two push plates 407, which are arranged in an alternating manner. The two push plates 407 are connected by a weight screening unit 409, and the weight screening unit 409 is rotatably mounted on the fixed shell 401. The lower ends of the two push plates 407 respectively correspond to the two symmetrical spaces on the fixed shell 401. The pop-up assembly also includes two symmetrically distributed fixed plates 404, which are fixedly mounted on the fixed shell 401. A plurality of evenly distributed springs 3 403 are arranged on the fixed plate 404, and the first end of the spring 3 403 is fixedly mounted on the fixed plate 404, and the second end of the spring 3 403 is fixedly mounted on the push plate 407. The pop-up assembly also includes a cylinder 402, which is fixedly mounted on the fixed shell 401. A shift rod is fixedly mounted on the cylinder arm of the fixed shell 401, and the shift rod is arranged between the upper ends of the two push plates 407.

[0042] The object slides onto the receiving plate 406, and then the visual sensor performs an appearance inspection on the object. When the object is heavy, the heavy object passes through the receiving plate 406 to compress the elastic member in the telescopic member 405, and the heavy object slides through the receiving plate 406 into the mobile housing 101 below the receiving plate 406. The heavy object contacts the receiving plate 103 in the mobile housing 101, and then the receiving plate 103 compresses the multiple springs 104, and the heavy object slides through the receiving plate 103 to the bottom of the mobile housing 101, and the springs 104 The elastic potential energy is offset, and the light items cannot be compressed by the elastic member in the telescopic member 405, and then the cylinder 402 is started, and the cylinder arm of the cylinder 402 drives the lever to extend or retract, and the cylinder 402 drives the push plate 407 to move through the lever, and the lower end of the push plate 407 pushes the light items into the mobile housing 101, and the light items contact with the receiving plate 103, and then the receiving plate 103 compresses the multiple springs 104, and the heavy items slide to the bottom of the mobile housing 101 through the receiving plate 103, and the elastic potential energy of the springs 104 is offset.

[0043] Working principle: Place objects of different heights, widths and sizes on the conveyor belt 1 217, start the hydraulic cylinder 1 203, the cylinder arm of the hydraulic cylinder 1 203 drives the rotating shaft 1 205 to slide through the connecting plate 204, the rotating shaft 1 205 is key-connected with the keyway shaft 2 213, start the motor 202, the output end of the motor 202 drives the keyway shaft 2 213 to rotate through the rotating shaft 1 205, the keyway shaft 213 drives the rotating shaft 3 211 to rotate through the belt 2 212, the rotating shaft 3 211 drives the pinion 3 215 to rotate through the pinion 2 214, the pinion 3 215 drives the rotating shaft 5 219 to move, the rotating shaft 5 219 drives the conveyor belt 1 217 to move, the conveyor belt 1 217 drives the objects of different heights, widths and sizes to move, when the height is high The items pass through the sorting chute 216 and then slide into the transfer unit 3, and the high items slide onto the conveyor belt 2 305 through the inclined plate 1 302, and the hydraulic cylinder 2 306 is started. The cylinder arm of the hydraulic cylinder 2 306 retracts, and the cylinder arm of the hydraulic cylinder 2 306 drives the push block 311 to move, and the push block 311 is out of contact with the conical connector 309. The elastic force of the spring 2 308 drives the conical connector 309 to move through the key shaft 1 307, and the conical connector 309 drives the key shaft 2 310 to move. The key shaft 2 310 is connected with the key of the rotating shaft 6 303, and the rotating shaft 5 219 drives the rotating shaft 6 303 to rotate through the connecting assembly, and the rotating shaft 6 303 drives the conveyor belt 2 305 to move, and the conveyor belt 2 305 drives the high items to slide to In the weight screening unit 4, when there are no high objects, the hydraulic cylinder 2 306 is started, the cylinder arm of the hydraulic cylinder 2 306 is extended, and the cylinder arm of the hydraulic cylinder 2 306 drives the push block 311 to move, and the push block 311 contacts the conical connecting piece 309, and the cylinder arm of the hydraulic cylinder 2 306 continues to extend, and the push block 311 compresses the conical connecting piece 309 through the conical surface on the conical connecting piece 309 The spring 2 308, at this time, the key shaft 2 310 is disconnected from the rotating shaft 6 303, and the low-height objects slide into the weight screening unit 4 through the conveyor belt 1 217, and the objects slide onto the receiving plate 2 406, and then the visual sensor is used to detect the appearance of the objects. When the weight of the objects is large, the heavy objects pass through the receiving plate 2 406 to make The elastic member in the telescopic member 405 is compressed, and the heavy object slides through the receiving plate 406 into the mobile housing 101 below the receiving plate 406. The heavy object contacts the receiving plate 103 in the mobile housing 101, and then the receiving plate 103 compresses the multiple springs 104. The heavy object slides through the receiving plate 103 to the bottom of the mobile housing 101, and the elastic potential energy of the springs 104 is offset. The light object cannot be compressed by the elastic member in the telescopic member 405, and then the cylinder 402 is started. The cylinder arm of the cylinder 402 drives the lever to extend or retract. The cylinder 402 drives the push plate 407 to move through the lever, and the lower end of the push plate 407 pushes the light object into the mobile housing 101.The light-weighted objects contact the receiving plate 103, and then the receiving plate 103 compresses the multiple springs 104. The heavy-weighted objects slide down to the bottom of the mobile housing 101 through the receiving plate 103, and are offset by the elastic potential energy of the springs 104. When the conveyor belt 217 needs to move quickly, the hydraulic cylinder 203 is started, and the cylinder arm of the hydraulic cylinder 203 drives the rotating shaft 205 to slide through the connecting plate 204. The rotating shaft 205 is key-connected with the keyway shaft 206. The keyway shaft 206 drives the rotating shaft 208 to rotate through the belt 1 207. The rotating shaft 208 drives the small gear 1 210 to move through the large gear 209. The small gear 1 210 drives the conveyor belt 1 217 to move through the rotating shaft 4 218. The conveyor belt 1 217 drives the rotating shaft 5 219 to rotate.

[0044] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A transmission device for a wide-narrow sorting machine, comprising a high-low screening unit (2), a transfer unit (3) and a weight screening unit (4), wherein the transfer unit (3) is installed on one side of the high-low screening unit (2), the weight screening unit (4) is installed on one end of the high-low screening unit (2), and a plurality of transport units (1) are arranged below the weight screening unit (4), characterized in that: The high-low screening unit (2) comprises a support frame (201), a sub-control component is mounted on the support frame (201), a transmission component is mounted on the sub-control component, and the transmission component is connected to the transfer unit (3); the weight screening unit (4) comprises a second fixed shell (401), the second fixed shell (401) is fixedly mounted on the support frame (201), the second fixed shell (401) is connected to the transfer unit (3), a pop-up component is arranged in the second fixed shell (401), two symmetrical spaces are arranged on the second fixed shell (401), weight detection components are arranged in the two spaces respectively, and a square hole is opened at the bottom of each space, and each square hole corresponds to a transport unit (1); The sub-control component comprises a motor (202), the motor (202) being fixedly mounted on a support frame (201), a first spline groove being arranged on an output end of the motor (202), a hydraulic cylinder (203) being fixedly mounted on one side of the motor (202), a connecting plate (204) being fixedly mounted on a cylinder arm of the hydraulic cylinder (203), a rotating shaft (205) being rotatably mounted on the connecting plate (204), and splines (205) matching the first spline groove being arranged on both ends of the rotating shaft (205); The sub-control component further comprises a second keyway shaft (213), the second keyway shaft (213) being rotatably mounted on the support frame (201), a first keyway shaft (206) being rotatably mounted on the second keyway shaft (213), the first keyway shaft (206) and the second keyway shaft (213) both being provided with a first spline groove, the sub-control component further comprises a second rotating shaft (208) and a third rotating shaft (211), the second rotating shaft (208) and the third rotating shaft (211) both being rotatably mounted on the support frame (201), a large gear (209) being fixedly mounted on the second rotating shaft (208), the second rotating shaft (208) being connected to the first keyway shaft (206) via a belt (207), the third rotating shaft (211) and the second keyway shaft (213) being connected via a belt (212), and a second small gear (214) being fixedly mounted on the third rotating shaft (211); The transmission assembly comprises a rotating shaft four (218) and a rotating shaft five (219), wherein the rotating shaft four (218) and the rotating shaft five (219) are both rotatably mounted on the support frame (201), a small gear one (210) is fixedly mounted on one end of the rotating shaft four (218), and the small gear one (210) is meshed with a large gear (209), a small gear three (215) is fixedly mounted on one end of the rotating shaft five (219), and the small gear three (215) is meshed with a small gear two (214), a sliding groove (220) is arranged on the other end of the rotating shaft five (219), the rotating shaft four (218) and the rotating shaft five (219) are connected via a transmission belt one (217), and a second spline groove is arranged on the sliding groove (220); The transfer unit (3) comprises a fixed housing 1 (301), the fixed housing 1 (301) being connected to a fixed housing 2 (401), the fixed housing 1 (301) being connected to a support frame (201), a rotating shaft 7 (304) and a rotating shaft 6 (303) being rotatably mounted on the fixed housing 1 (301), the rotating shaft 6 (303) and the rotating shaft 7 (304) being connected via a transmission belt 2 (305), an inclined plate 1 (302) being fixedly mounted on one side of the fixed housing 1 (301), the inclined plate 1 (302) being connected to the support frame (201), and a second spline groove identical to that on the motor (202) being arranged on one end of the rotating shaft 6 (303); The transfer unit (3) further comprises a connection assembly, the connection assembly comprising a key shaft 1 (307), the key shaft 1 (307) being provided with a spline 2 matching the second spline groove, the key shaft 1 (307) being connected to the high and low screening unit (2), the key shaft 1 (307) being provided with a spring 2 (308), the first end of the spring 2 (308) being connected to the key shaft 1 (307), one end of the key shaft 1 (307) being fixedly connected with a conical connecting piece (309), the conical connecting piece (309) being fixedly mounted with a key shaft 2 (310), the key shaft 2 (310) being provided with a spline 2 matching the second spline groove, the key shaft 2 (310) being key-connected to one end of the rotating shaft 6 (303); The connection assembly further comprises a second hydraulic cylinder (306), the cylinder barrel of the second hydraulic cylinder (306) being fixedly mounted on the first fixed housing (301), a push block (311) being fixedly mounted on the cylinder arm of the second hydraulic cylinder (306), and the push block (311) being in contact with the conical connection piece (309).

2. A transmission device for a wide-narrow sorting machine as claimed in claim 1, characterized in that: The weight detection component includes a plurality of visual sensors, which are evenly distributed in the space on the fixed shell 2 (401). The weight detection component also includes a receiving plate 2 (406), one end of which is rotatably mounted in a square hole at the lower end of the space. Two symmetrically distributed telescopic parts 1 (405) are arranged below the receiving plate 2 (406). The telescopic parts 1 (405) include a connecting tube and a connecting arm. The connecting tube is rotatably mounted on the fixed shell 2 (401). The connecting tube and the connecting arm are slidably connected. The connecting arm is rotatably mounted on the receiving plate 2 (406). An elastic part is arranged between the connecting arm and the connecting tube. The first end of the elastic part is fixedly mounted on the connecting arm, and the second end of the elastic part is fixedly mounted on the connecting tube.

3. A transmission device for a wide-narrow sorting machine as claimed in claim 2, characterized in that: The pop-up assembly comprises two push plates (407), the two push plates (407) are arranged alternately, the two push plates (407) are connected by a connecting shaft (408), the connecting shaft (408) is rotatably mounted on the fixed shell (401), and the lower ends of the two push plates (407) respectively correspond to two symmetrical spaces on the fixed shell (401).

4. A transmission device for a wide-narrow sorting machine as claimed in claim 1, characterized in that: The transport unit (1) comprises a mobile shell (101), a plurality of evenly distributed wheels (102) are fixedly mounted on the bottom end of the mobile shell (101), a receiving plate (103) is slidably mounted inside the mobile shell (101), a plurality of springs (104) are arranged on the receiving plate (103), the plurality of springs (104) are evenly distributed, a first end of the spring (104) is fixedly mounted on the receiving plate (103), and a second end of the spring (104) is fixedly mounted inside the mobile shell (101).

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