Banknote moving detection structure of banknote sorter

Abstract

The invention relates to the technical field of banknote sorting equipment, in particular to a banknote moving detection structure of a banknote sorter, which comprises a bottom plate and a frame, and the frame is fixed on the bottom plate; the guide wheel detection assemblies are mounted on the inner side of the frame at intervals and used for detecting the thickness change of the paper money when the paper money passes; the magnet is installed at the output end of the guide wheel detection assembly, and the guide wheel detection assembly is used for converting the thickness change generated when the paper money passes through into the displacement motion of the magnet in the vertical direction; the output unit comprises a mounting plate which is fixed at the top of the frame and is positioned on one side of the magnets, and digital Hall sensors are arranged on the mounting plate and are opposite to the magnets. The auxiliary detection guide wheel is arranged at the same detection point, the auxiliary detection guide wheel and the main detection guide wheel are arranged front and back, and the output units symmetrically arranged on the two sides are combined, so that paper money with adhesive tape and paper money with folds can be effectively recognized, the paper money recognition accuracy and the equipment fault-tolerant capability are greatly improved, and the adaptability and practicability in use are improved.

Description

Technical Field

[0001] This application relates to the field of banknote sorting equipment technology, and in particular to a banknote detection structure for banknote sorting machines. Background Technology

[0002] In the field of banknote sorting and processing, sorting machines need to perform high-speed and accurate detection of banknotes' integrity, authenticity, and version. Among these, the identification of banknotes that have been damaged and taped together (commonly known as "tape banknotes") is crucial. If tape banknotes cannot be effectively identified and sorted out, they may cause banknote jams, machine malfunctions, or even affect the detection of new banknotes in subsequent circulation or processing.

[0003] On the other hand, it is equally important to distinguish between tape and natural creases on banknotes. Tape is usually continuous, smooth, and has a certain width, while creases are random, sharp, and discontinuous. Existing single-point or multi-point independent detection structures can only detect changes in the absolute value of thickness and cannot distinguish between these two different types of thickness changes from a mechanistic perspective, resulting in a high false positive rate.

[0004] Based on this, those skilled in the art have proposed a banknote detection structure for banknote sorting machines, providing a new solution to the aforementioned technical problems. Summary of the Invention

[0005] To address the problems mentioned in the background art, this application provides a banknote detection structure for a banknote sorting machine.

[0006] The banknote sorting machine provided in this application adopts the following technical solution for its banknote detection structure: The banknote sorting machine's banknote detection structure includes a base plate and a frame, with the frame fixed to the base plate; Several guide wheel detection components are installed at intervals inside the frame to detect changes in the thickness of the banknote as it passes through. A magnet is installed on the output end of the guide wheel detection assembly, which is used to convert the thickness change caused by the banknote passing through into the displacement motion of the magnet in the vertical direction. The output unit includes a mounting plate fixed to the top of the frame and located on one side of a plurality of magnets. A digital Hall sensor is disposed on the mounting plate opposite to the magnets for detecting changes in the magnetic field generated by the up-and-down movement of the magnets.

[0007] By adopting the above technical solution, non-contact detection is achieved by converting changes in banknote thickness into vertical displacement of a magnet and using a digital Hall sensor to detect changes in the magnetic field. This structure avoids the wear and false triggering problems of traditional mechanical sensors, improving the stability and lifespan of the detection. The multi-guide wheel detection components are arranged at intervals, enabling simultaneous detection of multiple banknote positions. At the same time, the digital Hall sensor is sensitive to changes in the magnetic field and can capture minute changes in thickness, thus effectively distinguishing between the continuous and smooth thickness changes of tape banknotes and the random and discontinuous thickness changes of natural folds, reducing the false judgment rate.

[0008] Optionally, a mounting bracket is fixed on the frame, and a plurality of guide grooves are spaced apart on both sides of the mounting bracket, with the magnet slidably connected to the inner side of the corresponding guide groove; By adopting the above technical solution, a mounting bracket and a guide groove are set on the frame. The magnet is slidably connected in the guide groove, which ensures that the movement of the magnet in the vertical direction is accurately guided, preventing the magnet from deflecting or getting stuck. This improves the accuracy and repeatability of displacement conversion. The guide groove structure is simple and reliable, reduces the detection error caused by magnet shaking, further enhances the stability of the output signal, and makes the reading of the digital Hall sensor more reliable.

[0009] Optionally, the guide wheel detection assembly includes: The first swing frame has a connecting ring on the inner side of its end. The connecting ring is installed inside the frame. The first swing frame can swing around the connecting ring. A transmission plate is rotatably connected to the top of the first swing frame. The magnet is rotatably connected to the corresponding transmission plate. A connecting rod is installed inside the frame. The connecting rod passes through several of the connecting rings. The main detection guide wheel is installed on the inner side of the first swing frame and is used to contact the passing banknotes; A torsion spring is fitted onto the connecting ring; By adopting the above technical solution, the first swing frame swings around the connecting ring, and the change in banknote thickness is converted into the displacement of the magnet through the transmission plate. The torsion spring provides the restoring force, and the torsion spring ensures the continuous contact between the guide wheel and the banknote, avoiding missed detection. At the same time, it buffers the impact force and extends the life of the component. The design of the transmission plate smoothly converts the swing motion of the first swing frame into the vertical displacement of the magnet, reducing force loss and improving signal transmission efficiency.

[0010] Optionally, several of the connecting rings are fixed to the outside of the support shaft, and one lever arm of the torsion spring acts on the frame, while the other lever arm acts on the first swing frame. By adopting the above technical solution, the connecting ring is fixed to the support shaft, which unifies the installation benchmark of multiple sets of guide wheel detection components, improves the consistency of detection accuracy, and the torsion spring levers act on the frame and the first swing frame respectively, with clear reset direction and stable force, avoiding detection errors caused by reset deviation.

[0011] Optionally, the guide wheel detection assembly further includes a second swing frame, which is rotatably connected to the connecting ring and located inside the corresponding first swing frame. An auxiliary detection guide wheel is rotatably connected to the inner side of the end of the second swing frame away from the main detection guide wheel. One arm of the torsion spring acts on the first swing frame, and the other arm acts on the second swing frame. By adopting the above technical solution, and by setting up a second swing frame and auxiliary detection guide wheel, which cooperate with the first swing frame and main detection guide wheel, two adjacent detection points are formed on the same cross-section of the banknote channel. When the tape banknote passes through with a continuous and flat thickness change, the two guide wheels will undergo similar displacements almost simultaneously. When the natural folds pass through with a sharp and discontinuous thickness change, due to the narrow width of the folds, the two guide wheels will displace one after the other, and the displacement amplitudes may be different, thereby forming a local differential signal and effectively distinguishing local folds.

[0012] Optionally, a transmission plate is also rotatably connected to the top of the second swing frame at a position opposite to the top transmission plate of the first swing frame. A magnet is also rotatably attached to the top of the transmission plate at the top of the second swing frame. The mounting plate is installed between the magnets arranged opposite to each other on both sides. The digital Hall sensor is arranged on both sides of the mounting plate and is arranged opposite to the magnet on the same side. The mounting frame is installed on the frame and the magnets on both sides are far apart from each other on one side. The magnets on both sides are slidably connected to the inner side of the corresponding guide groove on the same side. By adopting the above technical solution, the displacement of the main and auxiliary detection guide wheels can be detected independently and synchronously through the independently set magnets and digital Hall sensors on the second swing frame. Signals from two channels can be acquired at the same time. By analyzing the correlation between the two signals in time and amplitude, it can be determined whether it is tape or wrinkles, which significantly improves the accuracy and intelligence level of recognition.

[0013] Optionally, the connecting ring includes fastening sleeves arranged on both sides. The first swing frame and the second swing frame are rotatably connected to the outer sides of the fastening sleeves on both sides. The inner sides of the two fastening sleeves are provided with adjusting screw sleeves. The outer ends of the adjusting screw sleeves are provided with threaded sections with opposite directions of rotation. The two fastening sleeves are respectively threaded to the threaded sections with opposite directions of rotation at both ends of the adjusting screw sleeves. The connecting rod passes through a plurality of adjusting screw sleeves. Adjacent adjusting screw sleeves are rotatably connected to each other. Two adjacent adjusting screw sleeves are rotatably connected to a support seat at one end close to each other. The support seat is fixed on the base plate. By adopting the above technical solution, the connecting ring is adjustable through the design of the fastening sleeve and the adjusting screw sleeve. The oppositely screwed sections at both ends of the adjusting screw sleeve allow for fine adjustment of the distance between the two fastening sleeves, thereby adjusting the initial position or preload of the guide wheel detection assembly. This effectively addresses the issue of loosening between the first and second swing frames during long-term use, which could lead to axial separation between the first and second swing frames along the fastening sleeve. This prevents axial movement of the first and second swing frames during banknote passage, which could affect detection accuracy. It also facilitates on-site calibration and maintenance, ensuring consistent detection performance under different banknote thicknesses or wear conditions.

[0014] Optionally, the connecting rod is rotatably connected to the inner side of the frame, and mounting blocks are rotatably connected to both ends of the outer side of the connecting rod. A plurality of guide rods are fixed between two mounting blocks, and the plurality of guide rods are distributed on the outer periphery of the connecting rod. A drive gear is slidably connected to the plurality of guide rods, and the drive gear is threadedly connected to the outer side of the connecting rod. The inner side of the adjusting sleeve is provided with a tooth groove that matches the drive gear, and the drive gear can mesh with the corresponding adjusting sleeve through the tooth groove. A first gear is fixed to the outer side of the mounting block, and a second gear is fixed to the outer side of the end of the connecting rod. By adopting the above technical solution, when axial loosening occurs between a certain group of first and second swing frames, they can be pre-tightened and adjusted individually without affecting other normal first and second swing frames that have not experienced axial loosening. This improves maintenance efficiency, allows maintenance to be performed without disassembling the machine, enhances operational flexibility and convenience, adapts to different maintenance needs, and reduces the risk of misoperation.

[0015] Optionally, a first adjustment knob is rotatably and slidably connected to the outside of the frame. One end of the first adjustment knob is fixed with a drive gear ring that is adapted to the first gear and the second gear. An adjustment gap is provided between the first gear and the second gear, and the width of the adjustment gap is greater than the thickness of the drive gear ring.

[0016] By adopting the above technical solution, the drive gear can be driven to the corresponding position to adjust the preload between the first swing frame and the second swing frame at that position, which improves the convenience of adjustment. At the same time, by adjusting the clearance, it is ensured that the drive gear ring will not mesh with the two gears at the same time, thus avoiding adjustment conflicts.

[0017] Optionally, a second adjusting knob is rotatably connected to the outer side of the frame, one end of which is adapted to and meshes with the first gear, and a third adjusting knob is rotatably connected to the inner side of the second adjusting knob, one end of which is adapted to and meshes with the second gear.

[0018] By adopting the above technical solution, the two knobs have independent and clear functions. Operators do not need to memorize the functions corresponding to the push and pull actions. The operation is simple and convenient, with good practicality, and the error rate is reduced.

[0019] In summary, this application includes at least one of the following beneficial technical effects: This invention, by setting auxiliary detection guide wheels at the same detection point and arranging them in front of and behind the main detection guide wheels, combined with output units symmetrically arranged on both sides, can effectively identify banknotes with tape and creases, greatly improving the accuracy of banknote recognition and the fault tolerance of the equipment, and enhancing its adaptability and practicality in use.

[0020] This invention, by setting up a fastening sleeve and adjusting screw sleeve, in conjunction with a rotatable connecting rod and its threaded drive gear, allows for individual pre-tightening adjustment when axial loosening occurs between a set of first and second swing frames, without affecting other normal first and second swing frames that have not experienced axial loosening. This improves maintenance efficiency, allows for maintenance without disassembly, enhances operational flexibility and convenience, adapts to different maintenance needs, and reduces maintenance costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the banknote detection structure of the banknote sorting machine according to an embodiment of this application.

[0022] Figure 2 This is a schematic front view of the guide wheel detection assembly according to an embodiment of this application. Figure 1 .

[0023] Figure 3 This is a schematic diagram of the axial view structure of the guide wheel detection assembly according to an embodiment of this application.

[0024] Figure 4 This is a schematic diagram of the structure of the digital Hall sensor and mounting plate according to an embodiment of this application.

[0025] Figure 5 This is a schematic diagram of the mounting bracket and guide groove in an embodiment of this application.

[0026] Figure 6 This is a schematic diagram of the structure of the first swing frame and the second swing frame in the embodiments of this application.

[0027] Figure 7 This is a schematic front view of the guide wheel detection assembly according to an embodiment of this application. Figure 2 .

[0028] Figure 8 This is a top view of the fastening sleeve according to an embodiment of this application.

[0029] Figure 9This is a schematic diagram of the structure of the fastening sleeve in an embodiment of this application.

[0030] Figure 10 This is a schematic diagram of the connecting rod and drive gear in an embodiment of this application.

[0031] Figure 11 This is a schematic diagram of the structure of the adjusting screw sleeve in an embodiment of this application.

[0032] Figure 12 This is a schematic diagram of the structure of the first gear and the second gear in the embodiments of this application.

[0033] Figure 13 This is a schematic diagram of the structure of the second and third knobs in the embodiments of this application.

[0034] Explanation of reference numerals in the attached figures: 1. Base plate; 2. Frame; 3. Guide wheel detection assembly; 4. Mounting bracket; 5. Mounting plate; 6. Connecting ring; 7. Main detection guide wheel; 8. Magnet; 9. Transmission plate; 10. Torsion spring; 11. First swing frame; 12. Digital Hall sensor; 13. Guide groove; 14. Second swing frame; 17. Auxiliary detection guide wheel; 19. Fastening sleeve; 20. Support base; 21. Adjusting screw sleeve; 22. Connecting rod; 23. Mounting block; 24. Guide rod; 25. Drive gear column; 26. First gear; 27. Second gear; 28. First adjusting knob; 29. ​​Drive gear ring; 30. Second adjusting knob; 31. Third adjusting knob; 32. Adjusting gap. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in conjunction with the accompanying drawings. Figure 1-13 The present invention will now be described in further detail.

[0036] Reference Figure 1-13 This application provides a banknote sorting machine banknote detection structure, including a base plate 1 and a frame 2, wherein the frame 2 is fixed to the base plate 1 by screws; Inside the frame 2, multiple guide wheel detection components 3 are installed at intervals along the vertical direction of the banknote running path. The core of each guide wheel detection component 3 is a main detection guide wheel 7, part of which protrudes out of the channel of the frame 2 for contact with the surface of the banknote passing through. Magnet 8 is installed on the output end of guide wheel detection assembly 3. Guide wheel detection assembly 3 is used to convert the thickness change generated when the banknote passes through into the displacement motion of magnet 8 in the vertical direction. The output unit includes a mounting plate 5 fixed on the top of the frame 2 and located on one side of several magnets 8. A digital Hall sensor 12 is arranged on the mounting plate 5 opposite to the magnets 8 to detect the magnetic field changes generated by the up-and-down movement of the magnets 8.

[0037] When a banknote, especially one with tape or creases, passes through, its thickness changes, causing the main detection guide wheel 7 to move up and down. This displacement is transmitted and amplified through the first swing frame 11, and is ultimately converted into the precise vertical displacement of the magnet 8.

[0038] When magnet 8 moves up and down, the relative distance between it and digital Hall sensor 12 changes, causing a change in the magnetic field strength at the sensor's location. Digital Hall sensor 12 detects this change in real time and converts it into a digital electrical signal, which is then output to the sorting machine's control system to detect the banknote thickness characteristics. The sorting machine's control system is existing technology and will not be described in detail here.

[0039] Reference Figure 5 A mounting bracket 4 is fixed on the frame 2. On the two side plates of the mounting bracket 4, corresponding to the position of each magnet 8, a vertical, smooth guide groove 13 is machined. Each magnet 8 is encapsulated in a plastic or metal slider, and the two ends of the slider are precisely embedded and slidably connected in the corresponding guide groove 13. This structure ensures that the magnet 8 can only move strictly in the vertical direction, avoiding detection errors caused by lateral swaying or deflection that may occur during lever transmission, and ensuring the linearity and accuracy of displacement detection.

[0040] Reference Figure 2-3 The guide wheel detection component 3 includes: The first swing frame 11 has a connecting ring 6 on the inner side of its end. The connecting ring 6 is installed inside the frame 2. The first swing frame 11 can swing around the connecting ring 6. The top of the first swing frame 11 is rotatably connected to a transmission plate 9. The magnet 8 is rotatably connected to the corresponding transmission plate 9. A connecting rod 22 is installed inside the frame 2. The connecting rod 22 passes through several connecting rings 6. The main detection guide wheel 7 is installed on the inner side of the first swing frame 11 and is used to contact the passing banknotes; A torsion spring 10 is fitted onto the connecting ring 6; When the change in banknote thickness pushes up the main detection guide wheel 7, the first swing frame 11 connecting ring 6 swings, pushing the magnet 8 to move upward along the guide groove 13 through the transmission plate 9; after the banknote passes through, all components are reset under the action of the torsion spring 10.

[0041] Several connecting rings 6 are fixed to the outside of the support shaft 15. One arm of the torsion spring 10 acts on the frame 2, and the other arm acts on the first swing frame 11. The torsion spring 10 provides a constant downward preload to the first swing frame 11, causing the main detection guide wheel 7 to press against the banknote.

[0042] Reference Figure 6-8In another optional embodiment, the guide wheel detection assembly 3 further includes a second swing frame 14. The second swing frame 14 adopts a structure that is approximately symmetrical with the first swing frame 11. It is rotatably connected to the outside of the connecting ring 6 and located inside the first swing frame 11. Both can swing independently around the connecting ring 6. On the inner side of the end of the second swing frame 14 away from the main detection guide wheel 7, an auxiliary detection guide wheel 17 is rotatably connected by a pin. The auxiliary detection guide wheel 17 has the same diameter and material as the main detection guide wheel 7, forming a front and rear detection structure. A torsion spring 10 is sleeved on the connecting ring 6. One end of its lever arm acts on the first swing frame 11, and the other end of its lever arm acts on the second swing frame 14. The preload is symmetrical with the first swing frame 11 to ensure that the guide wheels on both sides are subjected to force synchronously and equally when the banknote passes through.

[0043] Reference Figure 6-8 At the top of the second swing frame 14, corresponding to the transmission plate 9 of the first swing frame 11, the transmission plate 9 is also connected by a hinge, and a magnet 8 is rotatably connected to its top, forming a symmetrical magnet group on both sides. The mounting plate 5 is horizontally fixed on the top of the frame 2, located between the magnets 8 on both sides. Digital Hall sensors 12 are installed on both sides of the mounting plate 5, corresponding to each magnet 8. The sensors on both sides are independently wired to the control system. The mounting bracket 4 is symmetrically fixed on both sides of the frame 2, located on the side where the magnets 8 are far apart from each other. The magnets 8 on both sides are respectively embedded in the guide groove 13 of the mounting bracket 4 on the same side to ensure independent sliding. In use, the thickness change signal of the banknote is collected synchronously by the sensors on both sides as the banknote passes through, distinguishing between continuous changes in the tape and random changes in the narrow folds. When the signal values ​​collected by the digital Hall sensors 12 on both sides are the same or close to and greater than the thickness signal value when a normal banknote passes through, it indicates that the banknote with tape is passing through with a continuous and stable thickness change. At this time, the system can determine that the banknote has tape. When the signal values ​​collected by the digital Hall sensors 12 on both sides differ greatly, it indicates that the banknote with tape is passing through with a random thickness change. At this time, the system can determine that the banknote has folds.

[0044] Reference Figure 9-13The connecting ring 6 consists of two fastening sleeves 19 on both sides and an adjusting screw sleeve 21 in the middle. The inner side of the fastening sleeve 19 is machined with internal threads, and the two ends of the adjusting screw sleeve 21 are machined with external threads of opposite directions, such as left-hand thread on the left end and right-hand thread on the right end. The two fastening sleeves 19 on both sides are threadedly connected to the two ends of the adjusting screw sleeve 21 respectively. The first swing frame 11 and the second swing frame 14 are rotatably connected to the outer side of the two fastening sleeves 19 on both sides through bearings to ensure independent swing. The connecting rod 22 passes through the inner hole of all the adjusting screw sleeves 21 and is clearance-fitted with them. The ends of adjacent adjusting screw sleeves 21 are rotatably connected. In use, when the adjusting screw sleeve 21 is rotated, the two fastening sleeves 19 on both sides move towards or away from each other along the axial direction, driving the first and second swing frames to adjust the distance, thereby adjusting the preload between the first swing frame 11 and the second swing frame 14 to prevent axial clearance. At the same time, the included angle between the first swing frame 11 and the second swing frame 14 can be adjusted.

[0045] The connecting rod 22 passes through several adjusting screw sleeves 21. Adjacent adjusting screw sleeves 21 are rotatably connected to each other. Two adjacent adjusting screw sleeves 21 are rotatably connected to a support seat 20 on one side of each other. The support seat 20 is fixed on the base plate 1. The support seat 20 can support the ends of two adjacent adjusting screw sleeves 21 to prevent them from being misaligned and causing the central axis to be non-collinear, thus affecting the detection effect.

[0046] The connecting rod 22 is rotatably connected to the inner side of the frame 2. The two outer ends of the connecting rod 22 are rotatably connected to mounting blocks 23. Several guide rods 24 are fixed between the two mounting blocks 23. The guide rods 24 are distributed around the outer periphery of the connecting rod 22. Drive gear 25 is slidably connected to the guide rods 24. The drive gear 25 is threadedly connected to the outer side of the connecting rod 22. The inner side of the adjusting sleeve 21 has a tooth groove that matches the drive gear 25. The drive gear 25 can mesh with the corresponding adjusting sleeve 21 through the tooth groove. A first gear 26 is fixed to the outer side of the mounting block 23. A second gear 27 is fixed to the outer side of the end of the connecting rod 22. In use, rotating the first gear 26 can drive the mounting block 23 to rotate, which in turn causes the drive gear 25 to rotate through the guide rods 24. Rotating the second gear 27 can drive the connecting rod 22 to rotate, which drives the gear 25 to translate through the thread, thereby adjusting the position of the adjusting sleeve 21 so that it can mesh with the target adjusting sleeve 21.

[0047] Reference Figure 12-13A first adjustment knob 28 is rotatably and slidably connected to the outside of the frame 2. One end of the first adjustment knob 28 is fixed with a drive gear ring 29 that is adapted to the first gear 26 and the second gear 27. An adjustment gap 32 is provided between the first gear 26 and the second gear 27. The width of the adjustment gap 32 is greater than the thickness of the drive gear ring 29. In use, sliding the first adjustment knob 28 can make the drive gear ring 29 mesh with the first gear 26 to drive the drive gear 25 to rotate or mesh with the second gear 27 to adjust the position of the drive gear 25. The setting of the adjustment gap 32 can avoid simultaneous meshing and jamming, and realize the switching of adjustment mode.

[0048] Reference Figure 12-13 A second adjusting knob 30 is rotatably connected to the outer side of the frame 2. One end of the second adjusting knob 30 is adapted to and meshes with the first gear 26. A third adjusting knob 31 is rotatably connected to the inner side of the second adjusting knob 30. One end of the third adjusting knob 31 is adapted to and meshes with the second gear 27. In use, rotating the second adjusting knob 30 can independently drive the first gear 26 and control the rotation of the adjusting screw sleeve 21; rotating the third adjusting knob 31 can independently drive the second gear 27 and control the drive gear 25 to mesh with the target adjusting screw sleeve 21. The adjustment between the two knobs can be operated independently, improving the adjustment accuracy.

[0049] The working principle of the banknote detection structure of the banknote sorting machine provided by this invention is as follows: In use, the banknote passes through the main detection guide wheel 7 and moves towards the auxiliary detection guide wheel 17, thereby driving the magnet 8 to make vertical displacement movement through the main detection guide wheel 7 or the auxiliary detection guide wheel 17. The displacement signal of the magnet 8 is detected by the digital Hall sensor 12. When a banknote with tape or wrinkles passes through, the movement angle of the main detection guide wheel 7 or the auxiliary detection guide wheel 17 is larger, resulting in a larger displacement signal of the magnet 8. At this time, the banknote is judged to be an abnormal banknote. When the displacement signals of the magnets 8 on the main detection guide wheel 7 and the auxiliary detection guide wheel 17 differ significantly, it can be determined that the banknote is a banknote with creases. When the displacement signals of the magnets 8 on the main detection guide wheel 7 and the auxiliary detection guide wheel 17 are the same or close, it can be determined that the banknote is a banknote with tape. When it is necessary to adjust the preload between a set of first swing frames 11 and second swing frames 14, rotate the first adjustment knob 28 or the third adjustment knob 31 to drive the connecting rod 22 to rotate, thereby driving the drive gear 25 to move to the inner side of the adjusting sleeve 21 on the inner side of the first swing frame 11 and the second swing frame 14 that need to be adjusted. During the adjustment process, when the tooth grooves on the inner side of the drive gear 25 and the adjusting sleeve 21 are misaligned, the first gear 26 can be slightly rotated by the first adjustment knob 28 or the second adjustment knob 30 to align the drive gear 25 with the tooth grooves on the inner side of the adjusting sleeve 21, and the drive gear 25 can continue to be adjusted. When the drive gear 25 is fully engaged with the corresponding adjusting sleeve 21, rotating the first gear 26 by the first adjustment knob 28 or the second adjustment knob 30 will drive the corresponding adjusting sleeve 21 to rotate, thereby driving the fastening sleeve 19 on its outer side to move closer to each other, thereby completing the adjustment.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A banknote sorting machine's banknote passing detection structure, characterized by, include: A base plate (1) and a frame (2), wherein the frame (2) is fixed on the base plate (1); Several guide wheel detection components (3) are installed at intervals inside the frame (2) to detect changes in the thickness of the banknote as it passes through; A magnet (8) is installed on the output end of the guide wheel detection assembly (3), which is used to convert the thickness change generated when the banknote passes through into the displacement movement of the magnet (8) in the vertical direction. The output unit includes a mounting plate (5) fixed on the top of the frame (2) and located on one side of a plurality of magnets (8). A digital Hall sensor (12) is disposed on the mounting plate (5) opposite to the magnets (8) for detecting the magnetic field changes generated by the up-and-down movement of the magnets (8).

2. The banknote sorting machine's banknote passing detection structure according to claim 1, characterized in that: A mounting bracket (4) is fixed on the frame (2). Several guide grooves (13) are spaced apart on both sides of the mounting bracket (4). The magnet (8) is slidably connected to the inner side of the corresponding guide groove (13).

3. The note sorting machine of claim 2, wherein: The guide wheel detection assembly (3) includes: The first swing frame (11) has a connecting ring (6) on the inner side of its end. The connecting ring (6) is installed inside the frame (2). The first swing frame (11) can swing around the connecting ring (6). The top of the first swing frame (11) is rotatably connected to a transmission plate (9). The magnet (8) is rotatably connected to the corresponding transmission plate (9). A connecting rod (22) is installed inside the frame (2). The connecting rod (22) passes through several of the connecting rings (6). The main detection guide wheel (7) is installed on the inner side of the first swing frame (11) and is used to contact the passing banknotes; A torsion spring (10) is fitted onto the connecting ring (6).

4. The banknote sorting machine's banknote passing detection structure according to claim 3, characterized in that: Several of the connecting rings (6) are fixed to the outside of the support shaft (15), and one arm of the torsion spring (10) acts on the frame (2) and the other arm acts on the first swing frame (11).

5. The banknote detection structure of the banknote sorting machine according to claim 3, characterized in that: The guide wheel detection assembly (3) further includes a second swing frame (14), which is rotatably connected to the connecting ring (6) and located inside the corresponding first swing frame (11). An auxiliary detection guide wheel (17) is rotatably connected to the inner side of the second swing frame (14) away from the main detection guide wheel (7). One arm of the torsion spring (10) acts on the first swing frame (11), and the other arm acts on the second swing frame (14).

6. The banknote detection structure of the banknote sorting machine according to claim 5, characterized in that: The top of the second swing frame (14) is also rotatably connected to the top transmission plate (9) of the first swing frame (11). The top of the transmission plate (9) at the top of the second swing frame (14) is also rotatably connected to a magnet (8). The mounting plate (5) is installed between the magnets (8) arranged opposite to each other on both sides. The digital Hall sensor (12) is arranged on both sides of the mounting plate (5) and is arranged opposite to the magnets (8) on the same side. The mounting frame (4) is installed on the frame (2) and the magnets (8) on both sides are far away from each other on one side. The magnets (8) on both sides are slidably connected to the inner side of the guide groove (13) corresponding to the same side.

7. The banknote detection structure of the banknote sorting machine according to claim 6, characterized in that: The connecting ring (6) includes fastening sleeves (19) arranged on both sides. The first swing frame (11) and the second swing frame (14) are rotatably connected to the outside of the fastening sleeves (19) on both sides. The two fastening sleeves (19) are provided with adjusting screw sleeves (21) on their inner sides. The two ends of the adjusting screw sleeves (21) are provided with threaded sections with opposite directions of rotation. The two fastening sleeves (19) are respectively threaded to the threaded sections with opposite directions of rotation at both ends of the adjusting screw sleeves (21). The connecting rod (22) passes through several adjusting screw sleeves (21). The adjacent adjusting screw sleeves (21) are rotatably connected to each other. The two adjacent adjusting screw sleeves (21) are rotatably connected to a support seat (20) on one side of each other. The support seat (20) is fixed on the base plate (1).

8. The banknote detection structure of the banknote sorting machine according to claim 7, characterized in that: The connecting rod (22) is rotatably connected to the inner side of the frame (2). The two outer ends of the connecting rod (22) are rotatably connected to mounting blocks (23). A number of guide rods (24) are fixed between the two mounting blocks (23). The number of guide rods (24) are distributed on the outer periphery of the connecting rod (22). A drive gear (25) is slidably connected to the guide rods (24). The drive gear (25) is threaded to the outer side of the connecting rod (22). The inner side of the adjusting sleeve (21) is provided with a tooth groove that matches the drive gear (25). The drive gear (25) can mesh with the corresponding adjusting sleeve (21) through the tooth groove. A first gear (26) is fixed to the outer side of the mounting block (23). A second gear (27) is fixed to the outer side of the end of the connecting rod (22).

9. The banknote detection structure of the banknote sorting machine according to claim 8, characterized in that: The frame (2) is rotatably and slidably connected to a first adjustment knob (28). One end of the first adjustment knob (28) is fixed with a drive gear ring (29) that is adapted to the first gear (26) and the second gear (27). An adjustment gap (32) is provided between the first gear (26) and the second gear (27). The width of the adjustment gap (32) is greater than the thickness of the drive gear ring (29).

10. The banknote detection structure of the banknote sorting machine according to claim 8, characterized in that: The frame (2) is rotatably connected to a second adjustment knob (30), one end of which is adapted to and meshes with the first gear (26). The second adjustment knob (30) is rotatably connected to a third adjustment knob (31), one end of which is adapted to and meshes with the second gear (27).

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