Friction type balance wheel sorting and conveying unit

Abstract

The invention discloses a friction type balance wheel sorting and conveying unit, which comprises a sorting roller and comprises a central shaft, a balance wheel and a conveying belt, the input shaft and the output shaft are coaxially and fixedly connected to the two ends of the central shaft respectively; the central groove is formed in the central shaft to form a closed space; the iron core is fixedly arranged in the central groove; the magnet exciting coil is regularly wound and bonded on the iron core, two ends of the magnet exciting coil extend out of the central shaft and are respectively connected with the magnetorheological elastomer interlayer with the input shaft and the output shaft, and the magnet exciting coil is annular and fixedly sleeved on the outer wall of the central shaft. The electric power of the power supply can flow into the magnet exciting coil of each sorting roller, the magnetic field is formed through electric magnetism generation according to the right-hand spiral rule, the magnetic field is applied to the magnetorheological elastomer interlayer, the magnetic particles in the magnetorheological elastomer interlayer form a chain-shaped / columnar structure in the magnetic field direction, regulation and control are carried out according to buffering of different package impacts of light and heavy, and the sorting accuracy is improved. And the bounce degree caused by impact between the packages and the sorting rollers when the packages are transported on the balance wheel sorting machine is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of conveying logistics items, and in particular to a friction-type balance wheel sorting and conveying unit. Background Art

[0002] The pendulum wheel sorter is mainly composed of sorting rollers, synchronous steering controllers, transmission devices, frames, etc. During operation, the steering controller changes the running direction of the sorting rollers according to the instructions and information identification issued by the management system, which can realize the sorting of items on the left and right sides and transfer the items to the diversion conveyor.

[0003] We found that when goods are transported on a pendulum wheel sorter, they impact the sorting rollers, causing packages to bounce, which in turn makes the trajectory easily deviate. This is because logistics packages come in many different types, each with its own characteristics. For example, light and soft packages (plastic boxes, foam boxes) are easily deformed and store elastic potential energy when impacted, releasing energy during rebound, causing bounce. For heavy and hard packages, local stress concentration occurs during collision, generating torque that causes rotational bounce. The reason is that existing pendulum wheel sorters lack control over the impact buffering of light and heavy packages. The bounce of packages can also have a negative impact on fragile and easily breakable goods, which is an urgent problem that needs to be solved. Summary of the Invention

[0004] The purpose of the present invention is to provide a friction type balance wheel sorting and conveying unit, which can reduce the degree of bounce caused by the impact between the parcel and the sorting roller when the parcel is transported on the balance wheel sorting machine.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A friction type balance wheel sorting and conveying unit, including a sorting roller, comprises: Central axis, horizontally placed; The input shaft and the output shaft are fixedly connected to both ends of the central shaft coaxially; The central groove is opened inside the central axis to form a closed space; An iron core is fixedly arranged inside the central slot; The excitation coil is regularly wound and bonded to the iron core, with its two ends extending out of the central axis and connected to the input shaft and output shaft respectively; The magnetorheological elastomer interlayer is annular in shape and is fixedly sleeved on the outer wall of the central shaft; The gradient foam metal layer is annular in shape and is fixedly sleeved on the outer wall of the sandwich. The porosity gradually changes from 70% to 30% from the outside to the inside. A plurality of pockets are fixedly arranged on the surface of the gradient foam metal layer, made of polypropylene and having an open opening; Among them, the positive and negative poles of the electrode are respectively connected to the input shaft and the output shaft to form a closed loop. When a variable current is passed through the closed loop, a variable magnetic field is formed near the central axis. When a magnetic field is applied to the magnetorheological elastomer interlayer, the magnetic particles in the magnetorheological elastomer interlayer form a chain / columnar structure along the direction of the magnetic field.

[0006] Preferably, the friction-type balance wheel sorting machine further comprises a wheel disc, which is composed of an upper layer, a first conductive layer and a lower layer, wherein the conductive layer is provided with shaft grooves adapted to the input shaft and the output shaft to enable rotational connection between the sorting roller and the wheel disc.

[0007] Preferably, the friction-type balance wheel sorting machine further comprises a chassis, a second conductive layer is arranged inside the top of the chassis, the first conductive layer and the second conductive layer are in contact with each other, a power supply and a variable resistor are arranged on the side of the chassis, the positive pole of the power supply is connected to one electrode of the variable resistor, the other electrode of the variable resistor is connected to the second conductive layer, and the negative pole of the power supply is connected to the second conductive layer.

[0008] Preferably, the wheel disc is fixedly connected to the frame, the frame is rotatably connected to the runner, both ends of the runner are respectively connected to the output shaft and the output shaft through a first O-ring, the frame is provided with a through groove, the through groove corresponds to the middle section of the runner, the frame is fixedly connected to the cylinder, and the cylinder corresponds to the through groove.

[0009] Preferably, a plurality of linearly arranged rotating shafts are rotatably connected in the chassis, and two adjacent rotating shafts are connected by a transmission wheel and a conveyor belt. The outermost rotating shaft is driven by a power motor, and the rotating shaft is connected to the rotating wheel through a second O-ring.

[0010] Preferably, a mounting plate is also fixedly connected in the chassis, the cylinder passes through the mounting plate and is rotatably connected to the mounting plate, one end of the cylinder is fixedly sleeved with a linkage, the linkage is slidably connected to a commutator, the commutator is rotatably connected to a circular shaft, multiple circular shafts are fixedly connected to the same adjustment plate, a fixed plate is fixedly connected in the chassis, and the adjustment plate and the fixed plate are slidably connected.

[0011] Preferably, the mounting plate is also installed with an adjusting motor, the output shaft of the adjusting motor is fixedly connected with a driving plate, the driving plate and the adjusting plate are arranged in linkage, and the sliding of the adjusting plate is promoted by controlling the rotation of the driving plate.

[0012] A buffering method for logistics transportation, using a friction-type balance wheel sorting and conveying unit, includes the following steps: The aluminum sheet is embedded in the package with an embedding depth of ≥0.3mm; A magnetic field is formed in each sorting roller on the friction-type balance wheel sorter; The aluminum sheets follow the package on the friction balance wheel sorting machine and move forward. When moving forward, they cut the sorting roller to form magnetic induction lines in the magnetic field, generating an Ampere force opposite to the direction of movement, forming a hedge.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the power of the power supply can flow into the excitation coil of each sorting roller. According to the right-hand screw rule, the electromagnetism forms a magnetic field, and then the magnetic field is applied to the magnetorheological elastomer interlayer. The magnetic particles in the magnetorheological elastomer interlayer form a chain / columnar structure along the direction of the magnetic field. According to the weight of the package being driven, the low-rigidity mode (G=0.5MPa) is switched for light packages (<2kg), and the high-rigidity mode (G=3MPa) is switched for heavy packages (>10kg). The impact buffering of light and heavy packages is adjusted to reduce the degree of bouncing caused by the impact between the packages and the sorting rollers when they are transported on the pendulum sorter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a friction-type balance wheel sorting and conveying unit proposed by the present invention; Figure 2 This is a schematic diagram of the internal structure of a friction-type balance wheel sorting and conveying unit proposed by the present invention; Figure 3 This is a schematic diagram of the internal structure of a friction-type balance wheel sorting and conveying unit proposed by the present invention; Figure 4 This is a schematic diagram of the connection structure between the wheel disc and the cylinder in a friction-type balance wheel sorting and conveying unit proposed by the present invention; Figure 5 This is a structural diagram of a coupling and a commutator in a friction-type balance wheel sorting and conveying unit proposed by the present invention; Figure 6 This is a circuit diagram of a friction-type balance wheel sorting and conveying unit proposed by the present invention, in which a power supply is connected in parallel with each excitation coil; Figure 7 This is a schematic cross-sectional structure diagram of a gradient foam metal layer, a magnetorheological elastomer interlayer, and a central axis in a friction-type balance wheel sorting and conveying unit proposed in the present invention; Figure 8 This is a structural schematic diagram of a friction-type balance wheel sorting and conveying unit proposed in the present invention.

[0015] In the figure: 1. Central shaft; 2. Input shaft; 3. Output shaft; 4. Central slot; 5. Iron core; 6. Magnetorheological elastomer interlayer; 7. Gradient foam metal layer; 8. Upper layer; 9. First conductive layer; 10. Lower layer; 11. Chassis; 12. Second conductive layer; 13. Power supply; 14. Rheostat; 15. Frame; 16. Rotor; 17. First O-ring; 18. Through slot; 19. Cylinder; 20. Rotating shaft; 21. Transmission wheel; 22. Conveyor belt; 23. Power motor; 24. Second O-ring; 25. Mounting plate; 26. Linkage; 27. Commutator; 28. Circular shaft; 29. ​​Adjustment plate; 30. Fixing plate; 31. Adjustment motor; 32. Drive plate; 33. Pocket. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] Reference Attachment Figure 1 -Attached Figure 8 , a friction type balance wheel sorting and conveying unit, including a sorting roller, comprising: Central axis 1, horizontally arranged; The input shaft 2 and the output shaft 3 are fixedly connected to the two ends of the central shaft 1 coaxially. The central groove 4 is provided inside the central shaft 1 to form a closed space; The iron core 5 is fixedly arranged inside the central slot 4; The excitation coil is regularly wound and bonded to the iron core 5, with its two ends extending out of the central axis 1 and connected to the input shaft 2 and output shaft 3 respectively; The magnetorheological elastomer interlayer 6 is annular and fixedly sleeved on the outer wall of the central shaft 1; The gradient foam metal layer 7 is annular in shape and is fixedly sleeved on the outer wall of the sandwich layer, with a porosity gradually changing from 70% to 30% from the outside to the inside; A plurality of pockets 33 are fixedly mounted on the surface of the gradient foam metal layer 7 and are made of polypropylene and have an open opening; Among them, the positive and negative poles of the electrode are respectively connected to the input shaft 2 and the output shaft 3 to form a closed loop. When a variable current is passed through the closed loop, a variable magnetic field is formed near the central axis 1. When a magnetic field is applied to the magnetorheological elastomer interlayer 6, the magnetic particles in the magnetorheological elastomer interlayer 6 form a chain / columnar structure along the direction of the magnetic field.

[0018] Through the above technical solution, a variable current can be passed into the excitation coil to achieve dynamic adjustment of stiffness. According to the formula ,in, is the initial stiffness, The magnitude of the current flowing through the excitation coil. For light packages, the current input is controlled to switch to low stiffness mode. For heavy packages, the current input is controlled to switch to high stiffness mode.

[0019] The friction-type balance wheel sorting machine also includes a wheel disc, which is composed of an upper layer 8, a first conductive layer 9 and a lower layer 10. The conductive layer is provided with shaft grooves adapted to the input shaft 2 and the output shaft 3 to enable rotational connection between the sorting roller and the wheel disc.

[0020] The friction-type balance wheel sorting machine also includes a chassis 11. A second conductive layer 12 is arranged on the top of the chassis 11. The first conductive layer 9 and the second conductive layer 12 are in contact with each other. A power supply 13 and a variable resistor 14 are arranged on the side of the chassis 11. The positive pole of the power supply 13 is connected to one electrode of the variable resistor 14, the other electrode of the variable resistor 14 is connected to the second conductive layer 12, and the negative pole of the power supply 13 is connected to the second conductive layer 12.

[0021] The wheel disc is fixedly connected to a frame 15, and the frame 15 is rotatably connected to a runner 16. Both ends of the runner 16 are respectively connected to the output shaft 3 and the output shaft 3 through a first O-ring 17. The frame 15 has a through groove 18, and the through groove 18 corresponds to the middle section of the runner 16. The frame 15 is fixedly connected to a cylinder 19, and the cylinder 19 corresponds to the through groove 18.

[0022] Multiple linearly arranged rotating shafts 20 are rotatably connected in the chassis 11. Two adjacent rotating shafts 20 are connected by a transmission wheel 21 and a conveyor belt 22. The outermost rotating shaft 20 is driven by a power motor 23, and the rotating shaft 20 is connected to the rotating wheel 16 through a second O-ring 24.

[0023] A mounting plate 25 is also fixedly connected inside the chassis 11. The cylinder 19 passes through the mounting plate 25 and is rotatably connected to the mounting plate 25. A linkage 26 is fixedly sleeved on one end of the cylinder 19. The linkage 26 is slidably connected to a commutator 27. The commutator 27 is rotatably connected to a circular shaft 28. Multiple circular shafts 28 are fixedly connected to the same adjustment plate 29. A fixed plate 30 is fixedly connected inside the chassis 11. The adjustment plate 29 is slidably connected to the fixed plate 30.

[0024] The mounting plate 25 is also equipped with an adjusting motor 31 , and the output shaft 3 of the adjusting motor 31 is fixedly connected to a driving plate 32 . The driving plate 32 is linked with the adjusting plate 29 , and the adjusting plate 29 is pushed to slide by controlling the rotation of the driving plate 32 .

[0025] Working principle: When in use, the power motor 23 is started to cause the shafts 20 to start rotating synchronously in the same direction. The rotation of the shafts 20 drives the wheels 16 to start rotating synchronously in the same direction through the second O-ring 24. The rotation of the wheels 16 drives the sorting rollers to rotate synchronously in the same direction through the first O-ring 17, thereby driving the parcels on the sorting machine forward. The power from the power source 13 can flow into the excitation coil of each sorting roller. According to the right-hand screw rule, the electromagnetism generates a magnetic field, which is then applied to the magnetorheological elastomer interlayer 6. The magnetic particles in the magnetorheological elastomer interlayer 6 form a chain / columnar structure along the direction of the magnetic field, significantly improving the shear modulus and damping characteristics of the sorting roller, and the response time is extremely short. Depending on the weight of the package being driven, the system switches to low stiffness mode (G=0.5MPa) for light packages (<2kg) and switches to high stiffness mode (G=3MPa) for heavy packages (>10kg).

[0026] Aluminum sheets can also be embedded in the package (depth ≥ 0.3mm) to prevent it from falling off. When the aluminum sheet passes through the vicinity of the sorting roller, magnetic induction lines are formed in the magnetic field. According to the right-hand rule, when the aluminum sheet passes through the magnetic induction lines, current is formed in the aluminum sheet. According to the left-hand rule, the current-carrying conductor forms an Ampere force in the magnetic field. The direction of the Ampere force is opposite to the direction of the package moving forward, forming an offset, thereby achieving a buffering effect.

[0027] It should be noted that: Reference Attachment Figure 7 The bag body 33 is made of polypropylene, so when the whole body rotates in the direction of the arrow in the attached figure, the wind will expand the bag body 33 through the opening, and provide preliminary buffering when it is hit by the cargo; The variable resistor 14 can be a digital potentiometer, which can quickly and accurately adjust the resistance value through digital signal control, or a variable resistance box can be used to select a fixed resistance value through a knob, which has a faster adjustment speed; In this solution, the excitation coil, input shaft 2, output shaft 3, first conductive layer 9, second conductive layer 12 and varistor 14 can be energized, and the remaining structures not explicitly described are made of non-conductive materials. The magnetorheological elastomer in the magnetorheological elastomer interlayer 6 is composed of a matrix, magnetic particles and a cross-linking agent, wherein: Matrix: elastic polymer material (solid state), providing initial elasticity and mechanical support; Magnetic particles: micron-sized ferromagnetic particles (usually 20%-60% volume fraction), evenly dispersed in the matrix; Cross-linking agent: used to enhance the interface bonding between matrix and particles.

[0028] There are two states: No magnetic field: The magnetic particles are randomly distributed and the material exhibits the mechanical properties of an ordinary elastomer (such as low modulus).

[0029] Applying a magnetic field: The particles form a chain / columnar structure along the direction of the magnetic field, significantly improving the shear modulus and damping properties of the material, and the response time is extremely short (milliseconds).

[0030] The magnetorheological elastomer is firmly wrapped by the inner and outer carrier layers, and finally forms an annular magnetorheological elastomer sandwich 6 .

[0031] The porosity of the gradient foam metal layer 7 changes gradually from the surface to the inside (e.g., the outer layer is dense and the inner layer is porous), which can achieve gradient control of stress buffering and energy absorption. The outer dense layer resists the initial impact, and the inner porous structure absorbs subsequent energy. Attached photos

[0032] YA represents an electromagnet, which is an excitation coil wound around the iron core 5 in this solution; Q represents a switch; S represents the power supply 13, which is the power supply 13 in this solution; R represents the variable resistor 14, which is the variable resistor 14 in this solution; Multiple excitation coils are connected in parallel in the circuit.

[0033] Reference Attachment Figure 8 , there is a package on the chassis 11, and an aluminum sheet is embedded in the package (the frame-shaped shaded area). The direction of the arrow is the forward direction of the package. When the aluminum sheet follows the package forward, it will cut the magnetic induction lines in the magnetic field formed on each sorting roller. According to the right-hand rule, the palm passes through the magnetic induction lines (N to S), and the thumb points in the forward direction. The four fingers can determine the direction of the induced current formed in the vertical part of the aluminum sheet, which is from top to bottom. Then according to the left-hand rule, the palm passes through the magnetic induction lines (N to S), and the four fingers point in the direction of current. The thumb can determine the direction of the Ampere force, which is opposite to the forward direction of the package, forming a hedge, thereby achieving a buffering effect.

[0034] Provisions of relevant data in this plan: 1. By adjusting the current to control the magnetic field strength generated by the excitation coil, the stiffness of the magnetorheological elastomer sandwich is switched: Light package (<2kg): low stiffness mode (G=0.5MPa), corresponding to low current.

[0035] Heavy package (>10kg): High stiffness mode (G=3MPa), corresponding to high current.

[0036] 2. Current parameter range, current adjustment range: 0.1~5A.

[0037] Basis: The shear modulus (G) of magnetorheological material is positively correlated with the current. Combined with the formula ( is the initial stiffness, is the proportional coefficient), assuming that the initial stiffness G0 = 0.5MPa and the high stiffness G = 3MPa, the current change is required to drive the linear adjustment of the magnetic field strength.

[0038] 3. Safety considerations: Avoid overheating of the coil due to excessive current. Industrial-grade excitation coils usually allow a continuous current of ≤5A.

[0039] 4. The selection range of the variable resistor (14) is to control the loop current by adjusting the resistance value, and support dynamic switching of the stiffness mode. A digital potentiometer or a variable resistance box can be selected.

[0040] 5. Variable resistor (14) parameter range, resistance adjustment range: 0~200Ω.

[0041] Match the power supply voltage (such as 24V) and the coil resistance (assuming the coil internal resistance is about 10Ω), according to I =v / R Coil+ R rheostat V ,when R When the resistor is 0Ω, the maximum current I ≈24V / 10Ω=2.4A; when R When the resistor is 200Ω, the minimum current I ≈24V / 210Ω≈0.11A, covering current regulation requirements.

[0042] 6. Accuracy requirements: If a digital potentiometer is used, the recommended resolution is ≤ 0.1Ω to achieve fine adjustment of stiffness.

[0043] 7. Power supply (13) provides a stable DC power supply for the excitation coil, which must match the coil rated voltage and circuit power consumption.

[0044] 8. Power supply (13) voltage parameter range, voltage selection: DC 12~48V, 24V is recommended.

[0045] Basis: The DC voltage level commonly used in industrial automation equipment is 24V, which takes into account both safety and power output (for example, when the current is 2A, the power is 48W).

[0046] Compatibility: Adapt to the voltage requirements of digital potentiometers (usually operating voltage 5~30V) and electromagnetic coils.

[0047] 9. Other related parameters ① Magnetorheological elastomer interlayer: Magnetic particle volume fraction: 20%~60% (clearly mentioned in the document); Low concentration (20%) is suitable for low stiffness mode, while high concentration (60%) enhances magnetic field response.

[0048] Response time: ≤10ms (magnetorheological material properties, the article mentions "millisecond response").

[0049] ② Gradient metal foam layer (7): Porosity gradient: outer layer 70% → inner layer 30% (parameters specified in the document); The outer dense layer (porosity ≤ 40%) resists the initial impact, while the inner porous structure (porosity ≥ 60%) absorbs energy.

[0050] ③Aluminum sheet embedding requirements: Embedment depth: ≥0.3mm (clearly required in the text); Ensure that the sheet is stable and effectively generates Ampere force (F=BIL) when cutting magnetic flux lines.

[0051] 10. Parameter matching example:

[0052] 11. Notes: ① Heat dissipation design: When the excitation coil is subjected to high current for a long time, a heat sink must be configured to prevent the temperature from rising beyond the material tolerance limit (e.g., the enameled wire has a temperature resistance of 130~180℃).

[0053] ② Electromagnetic compatibility (EMC): Electromagnetic interference needs to be suppressed when the current is adjusted quickly. You can add filter capacitors or shielding coils.

[0054] ③ Dynamic adjustment logic: Combined with the package weight sensor signal, the current is automatically adjusted through the PID algorithm to achieve real-time stiffness matching.

[0055] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A friction type balance wheel sorting and conveying unit, characterized in that: Contains sorting rollers, including: The central axis (1) is horizontally arranged; The input shaft (2) and the output shaft (3) are fixedly connected to the two ends of the central shaft (1) coaxially. A central groove (4) is provided inside the central shaft (1) to form a closed space; An iron core (5) is fixedly arranged inside the central slot (4); The excitation coil is regularly wound and bonded to the iron core (5), with both ends extending out of the central shaft (1) and connected to the input shaft (2) and the output shaft (3) respectively; The magnetorheological elastomer interlayer (6) is annular and fixedly sleeved on the outer wall of the central shaft (1); The gradient foam metal layer (7) is annular in shape and is fixedly sleeved on the outer wall of the sandwich layer, and the porosity gradually changes from 70% to 30% from the outside to the inside; A plurality of pockets (33) are fixedly arranged on the surface of the gradient foam metal layer (7), made of polypropylene and having an open opening; The positive and negative electrodes are connected to the input shaft (2) and the output shaft (3) respectively to form a closed circuit. When a variable current is passed through the closed circuit, a variable magnetic field is formed near the central axis (1). When a magnetic field is applied to the magnetorheological elastomer interlayer (6), the magnetic particles in the magnetorheological elastomer interlayer (6) form a chain / columnar structure along the direction of the magnetic field.

2. A friction type balance wheel sorting and conveying unit according to claim 1, characterized in that: The friction-type balance wheel sorting machine also includes a wheel disc, which is composed of an upper layer (8), a first conductive layer (9) and a lower layer (10), wherein the conductive layer is provided with an axis groove adapted to the input shaft (2) and the output shaft (3) so as to enable a rotational connection between the sorting roller and the wheel disc.

3. The friction type balance wheel sorting and conveying unit according to claim 1, characterized in that: The friction-type balance wheel sorting machine further comprises a chassis (11), a second conductive layer (12) is arranged in the top of the chassis (11), the first conductive layer (9) and the second conductive layer (12) are in contact with each other, a power supply (13) and a variable resistor (14) are arranged on the side of the chassis (11), a positive electrode of the power supply (13) is connected to one electrode of the variable resistor (14), the other electrode of the variable resistor (14) is connected to the second conductive layer (12), and a negative electrode of the power supply (13) is connected to the second conductive layer (12).

4. The friction type balance wheel sorting and conveying unit according to claim 2, characterized in that: The wheel disc is fixedly connected to a frame (15), and the frame (15) is rotatably connected to a runner (16). Both ends of the runner (16) are respectively connected to the output shaft (3) and the output shaft (3) through a first O-ring (17). The frame (15) is provided with a through groove (18), and the through groove (18) corresponds to the middle section of the runner (16). The frame (15) is fixedly connected to a cylinder (19), and the cylinder (19) corresponds to the through groove (18).

5. The friction type balance wheel sorting and conveying unit according to claim 4, characterized in that: A plurality of linearly arranged rotating shafts (20) are rotatably connected in the chassis (11), and two adjacent rotating shafts (20) are connected via a transmission wheel (21) and a transmission belt (22). The outermost rotating shaft (20) is driven by a power motor (23), and the rotating shaft (20) is connected to the rotating wheel (16) via a second O-ring (24).

6. The friction type balance wheel sorting and conveying unit according to claim 4, characterized in that: A mounting plate (25) is fixedly connected in the chassis (11), the cylinder (19) passes through the mounting plate (25) and is rotatably connected to the mounting plate (25), one end of the cylinder (19) is fixedly sleeved with a linkage (26), the linkage (26) is slidably connected to a commutator (27), the commutator (27) is rotatably connected to a circular shaft (28), a plurality of circular shafts (28) are fixedly connected to the same adjustment plate (29), a fixed plate (30) is fixedly connected in the chassis (11), and the adjustment plate (29) is slidably connected to the fixed plate (30).

7. The friction type balance wheel sorting and conveying unit according to claim 6, characterized in that: The mounting plate (25) is further provided with an adjusting motor (31), and the output shaft (3) of the adjusting motor (31) is fixedly connected with a driving plate (32). The driving plate (32) is linked with the adjusting plate (29) to push the sliding of the adjusting plate (29) by controlling the rotation of the driving plate (32).

8. A buffering method applied to logistics transportation, characterized in that: The friction balance wheel sorting and conveying unit according to any one of claims 1 to 7 comprises the following steps: The aluminum sheet is embedded in the package with an embedding depth of ≥0.3mm; A magnetic field is formed in each sorting roller on the friction-type balance wheel sorter; The aluminum sheets follow the package on the friction balance wheel sorting machine and move forward. When moving forward, they cut the sorting roller to form magnetic induction lines in the magnetic field, generating an Ampere force opposite to the direction of movement, forming a hedge.

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