A bamboo stick counting device with "double protection"

Abstract

The present invention relates to a bamboo stick counting device with "double protection", comprising a bamboo stick feeding hopper, a bamboo stick conveying counting box and a bamboo stick collecting groove; bamboo stick entrances and bamboo stick exits are respectively arranged at two ends of the bamboo stick conveying counting box, wherein the bamboo stick entrance is connected to the bottom exit of the bamboo stick feeding hopper, and the bamboo stick exit is located above the bamboo stick collecting groove; a number display screen and a control panel are designed on the front of the bamboo stick conveying counting box; a multi-stage gear transmission mechanism, two groups of conveyor belt devices arranged side by side, a transmission belt and a ratchet counting mechanism are arranged in the bamboo stick conveying counting box; the bottom exit of the bamboo stick feeding hopper is only for one bamboo stick to pass through at a time, and only one bamboo stick can be transported between two adjacent gear teeth of the counting ratchet at a time; a limit switch is arranged in the ratchet counting mechanism for bamboo stick counting; and the limit switch is connected to the counting display screen through a control system. The present invention has the characteristics of simple structure, high counting accuracy, high counting efficiency, and simple and convenient operation.

Description

Technical Field

[0001] The invention relates to the technical field of counters, and in particular to a bamboo stick counting device with "double protection". Background Art

[0002] The rapid progress of science and technology has become a key factor in promoting my country's economic and social development. Scientific and technological progress has also made people's daily work faster and more efficient. In many jobs, more and more automated devices help people solve simple and arduous tasks.

[0003] In the catering industry, the number of bamboo sticks used is increasing day by day. For manufacturers and workplaces engaged in the catering industry, accurate counting of the number of bamboo sticks has become a cumbersome technical problem. At the same time, more and more devices for counting bamboo sticks have been developed. However, the existing bamboo stick counting devices have some problems in practical applications, such as: complex and cumbersome structure, low counting accuracy, low counting efficiency, etc.

[0004] The Chinese invention patent application with publication number CN 108537318 A discloses a "bamboo stick counting device", which uses an automatic connecting rod structure to count bamboo sticks. Its structure is relatively complex and its efficiency is low when used to count a large number of bamboo sticks; the Chinese invention patent application with publication number CN 108921272 A discloses "an automatic bamboo stick counting device", which uses a roller structure made of elastic material to quickly count bamboo sticks, but cannot ensure that only one bamboo stick is counted at a time, which reduces the accuracy of bamboo stick counting. Summary of the invention

[0005] The invention provides a bamboo stick counting device with "double protection", which has the characteristics of simple structure, high counting accuracy, high counting efficiency, and simple and convenient operation.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A bamboo stick counting device with "double protection", comprising a bamboo stick feeding hopper, a bamboo stick conveying and counting box and a bamboo stick collecting trough; bamboo stick inlet and bamboo stick outlet are respectively arranged at two ends of the bamboo stick conveying and counting box, wherein the bamboo stick inlet is connected to the bottom outlet of the bamboo stick feeding hopper, and the bamboo stick outlet is located above the bamboo stick collecting trough; a digital display screen and a control panel are designed on the front of the bamboo stick conveying and counting box; a multi-stage gear transmission mechanism, two sets of conveyor belt devices arranged side by side, a transmission belt and a ratchet counting mechanism are arranged in the bamboo stick conveying and counting box, and the two sets of conveyor belt devices are both arranged between the bamboo stick inlet and the bamboo stick outlet; the bamboo stick conveying and counting box is externally provided with Driving motor; the driving motor drives the conveyor belt device to operate through a multi-stage gear transmission mechanism, is connected to a ratchet counting mechanism through a transmission belt and drives the counting ratchet to rotate, the ratchet counting mechanism is arranged at the bamboo stick outlet and the end of the conveyor belt device; the bottom outlet of the bamboo stick feeding hopper only allows one bamboo stick to pass through at a time, and only one bamboo stick can be transported between two adjacent teeth of the counting ratchet at a time; a limit switch is arranged in the ratchet counting mechanism for counting bamboo sticks; the limit switch is connected to the counting display screen through a control system; the control system is also connected to a control panel and a motor driving circuit, and the motor driving circuit is connected to the control end of the driving motor.

[0008] The bamboo stick feeding hopper is a trapezoidal funnel structure with a large upper opening and a small lower opening. The length of the top entrance of the bamboo stick feeding hopper is greater than the length of the bamboo stick, and the width of the bottom exit of the bamboo stick feeding hopper is equal to the diameter of the bamboo stick + 1 to 3 mm. The bottom of the bamboo stick feeding hopper is supported and fixed by 4 supporting columns.

[0009] The bamboo stick conveying and counting box consists of a bottom plate, two wall plates, a top cover plate and an arc-shaped protective cover; wall plates are respectively arranged on both sides of the bottom plate, one end of the wall plate is fixedly connected to the supporting column of the bamboo stick feeding hopper, the arc-shaped protective cover is arranged on the outside of the counting ratchet, and a top cover plate is arranged between the arc-shaped protective cover and the corresponding side wall of the bamboo stick feeding hopper; the distance between the top cover plate and the top surface of the conveyor belt in the conveyor belt device is equal to the diameter of the bamboo stick + 1 to 3 mm.

[0010] The multi-stage gear transmission mechanism is a four-stage gear reduction transmission mechanism, the output shaft of the driving motor is connected to the first transmission shaft, the first transmission shaft is connected to the second transmission shaft through a first-stage gear set, the second transmission shaft and the third transmission shaft are connected through a second-stage gear set, and the third transmission shaft and the fourth transmission shaft are connected through a third-stage gear set; the conveyor belt device is composed of a first conveyor belt device and a second conveyor belt device, the fourth transmission shaft is connected to the driving shaft of the first conveyor belt device through a four-stage gear set, and the driving shaft of the first conveyor belt device is connected to the driving shaft of the second conveyor belt device through a coupling.

[0011] The first conveyor belt device and the second conveyor belt device are both composed of a conveyor belt, a driving shaft, a driven shaft, a conveyor belt bracket and a conveyor belt tensioning device; the driving shaft and the driven shaft are respectively arranged at the two ends of the conveyor belt bracket, and the conveyor belt is wound between the driving shaft and the driven shaft; the conveyor belt is made of PVC material; the conveyor belt tensioning device includes a tensioning bracket, a tensioning wheel and a tensioning spring, one end of the tensioning bracket is connected to the conveyor belt bracket through a tensioning spring, and the other end of the tensioning bracket is provided with a tensioning wheel, and the tensioning wheel is pressed tightly against the inner side of the downward transmission belt.

[0012] The ratchet counting mechanism consists of a ratchet transmission shaft, three counting ratchets arranged side by side and at intervals on the ratchet transmission shaft, and a transmission belt. The ratchet transmission shaft is connected to the output shaft of the driving motor through the transmission belt, and drives the three counting ratchets to rotate synchronously from one side of the conveyor belt device to the side of the bamboo stick collecting groove; the tooth pitch of two adjacent teeth on the counting ratchet = the diameter of the bamboo stick + 1 to 3 mm; the limit switch is arranged at the bottom of the arc-shaped protective cover, and its sensing side is located above the ratchet transmission shaft between the two counting ratchets; the distance between the arc-shaped protective cover and the top surface of the counting ratchet teeth is less than the diameter of the bamboo stick.

[0013] The control system is composed of a single chip microcomputer, a processor and a voice module; the processor and the voice module are connected to the single chip microcomputer respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) The bamboo stick counting device of the present invention can count the number of a large number of bamboo sticks at one time. The bamboo stick feeding hopper is designed as a trapezoidal funnel structure, and the bamboo sticks to be counted can be manually aligned and put into the bamboo stick feeding hopper at one time; the bamboo sticks automatically slide to the bottom outlet through the inclined bottom surface, and will not be scattered during the process, thereby saving the counting time of the bamboo sticks, thereby improving the counting efficiency;

[0016] 2) The device of the present invention provides double protection for achieving the accuracy of "one stick, one count" during the counting process: the first protection is that the bottom outlet width of the bamboo stick feed hopper and the distance between the top cover and the top surface of the corresponding end conveyor belt are accurate to a size slightly larger than the diameter of a bamboo stick, thereby achieving the effect of allowing only one bamboo stick to pass through at a time; the second protection is that the spacing between the ratchet teeth is accurate to a size slightly larger than the diameter of a bamboo stick, and at the same time, the gap between the arc-shaped protective cover and the top surface of the ratchet teeth is smaller than the diameter of a bamboo stick, which also ensures that only one bamboo stick can enter between the two teeth of the ratchet at a time; ultimately ensuring the accuracy of bamboo stick counting.

[0017] 3) Using a simple mechanical structure to replace the complex photoelectric control counting accuracy, while improving the accuracy of bamboo stick counting, making the device structure simpler and reducing production costs;

[0018] 4) The bamboo stick counting device of the present invention provides an operable human-machine interface. A start counting button, a stop counting button and a pause counting button are provided on the control panel, which is convenient for the operator to operate; the ratchet wheel presses the limit switch once each time a bamboo stick is transported, and the number of bamboo sticks is displayed on the counting display screen, which is convenient for the subsequent packaging and sale of the bamboo sticks;

[0019] 5) The device of the present invention adopts a conveyor belt device and a ratchet counting mechanism, which greatly simplifies the structure of the device, saves space and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of a bamboo stick counting device with "double protection" described in the present invention.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the bamboo stick conveying and counting box of the present invention (for the convenience of display, the top cover plate and the arc-shaped protective cover are removed).

[0022] Figure 3 It is a top view of the bamboo stick conveying and counting box of the present invention (for the convenience of display, the top cover plate and the arc-shaped protective cover are removed).

[0023] Figure 4 It is a schematic diagram of the installation position of the control system of the present invention.

[0024] Figure 5 It is a schematic diagram of the installation position of the limit switch of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the conveyor belt tensioning device of the present invention.

[0026] Figure 7 Schematic diagram of a control system according to an embodiment of the present invention.

[0027] Figure 8 Schematic diagram of a motor driving circuit according to an embodiment of the present invention.

[0028] In the figure: 1. Bamboo stick feeding hopper 2. Control panel 3. Counting display screen 4. Driving motor 5. Bamboo stick collecting slot 6. Top cover 7. Arc-shaped shield 8. Counting ratchet 9. First conveyor belt device 10. Second conveyor belt device 11. First gear set 12. Second gear set 13. Third gear set 14. Fourth gear set 15. Driving belt 16. Ratchet transmission shaft 17. Limit switch 18. First transmission shaft 19. Second transmission shaft 20. Third transmission shaft 21. Fourth transmission shaft 22. Coupling 23. Driving shaft of first conveyor belt device 24. Driving shaft of second conveyor belt device 25. Control system 26. Bamboo sticks 27. Tensioning wheel 28. Tensioning spring 29. Tensioning bracket DETAILED DESCRIPTION

[0029] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0030] like Figure 1-Figure 5 As shown, the bamboo stick counting device with "double protection" described in the present invention comprises a bamboo stick feeding hopper 1, a bamboo stick conveying and counting box and a bamboo stick collecting groove 5; bamboo stick inlet and bamboo stick outlet are respectively arranged at two ends of the bamboo stick conveying and counting box, wherein the bamboo stick inlet is connected to the bottom outlet of the bamboo stick feeding hopper 1, and the bamboo stick outlet is located above the bamboo stick collecting groove 5; a digital display screen 3 and a control panel 2 are designed on the front of the bamboo stick conveying and counting box; a multi-stage gear transmission mechanism, two sets of conveyor belt devices arranged side by side, a transmission belt 15 and a ratchet counting mechanism are arranged in the bamboo stick conveying and counting box, and the two sets of conveyor belt devices are arranged between the bamboo stick inlet and the bamboo stick outlet; the bamboo stick conveying and counting box is externally provided with a driving motor 4 ; The driving motor 4 drives the conveyor belt device to operate through a multi-stage gear transmission mechanism, and is connected to the ratchet counting mechanism through a transmission belt 15 and drives the counting ratchet 8 to rotate. The ratchet counting mechanism is arranged at the bamboo stick outlet and the end of the conveyor belt device; the bottom outlet of the bamboo stick feed hopper 1 only allows one bamboo stick 26 to pass through at a time, and only one bamboo stick 26 can be transported between two adjacent gear teeth of the counting ratchet 8 at a time; a limit switch 17 is arranged in the ratchet counting mechanism for counting the bamboo sticks 26; the limit switch 17 is connected to the counting display screen 3 through the control system 25; the control system 25 is also connected to the control panel 2 and the motor driving circuit, and the motor driving circuit is connected to the control end of the driving motor 4 (such as Figure 7 shown).

[0031] The bamboo stick feeding hopper 1 is a trapezoidal funnel structure with a large upper opening and a small lower opening. The length of the top entrance of the bamboo stick feeding hopper 1 is greater than the length of the bamboo stick 26, and the width of the bottom outlet of the bamboo stick feeding hopper 1 is equal to the diameter of the bamboo stick 26 + 1 to 3 mm; the bottom of the bamboo stick feeding hopper 1 is supported and fixed by 4 supporting columns.

[0032] The bamboo stick conveying and counting box is composed of a bottom plate, two wall panels, a top cover plate 6 and an arc-shaped protective cover 7; wall panels are respectively arranged on both sides of the bottom plate, one end of the wall panel is fixedly connected to the supporting column of the bamboo stick feeding hopper 1, the arc-shaped protective cover 7 is arranged on the outside of the counting ratchet 8, and a top cover plate 6 is arranged between the arc-shaped protective cover 7 and the corresponding side wall of the bamboo stick feeding hopper 1; the distance between the top cover plate 6 and the top surface of the conveyor belt in the conveyor belt device is equal to the diameter of the bamboo stick 26 + 1 to 3 mm.

[0033] The multi-stage gear transmission mechanism is a four-stage gear reduction transmission mechanism, the output shaft of the driving motor 4 is connected to the first transmission shaft 18, the first transmission shaft 18 is connected to the second transmission shaft 19 through the first-stage gear set 11, the second transmission shaft 19 is connected to the third transmission shaft 20 through the second-stage gear set 12, and the third transmission shaft 20 is connected to the fourth transmission shaft 21 through the third-stage gear set 13; the conveyor belt device is composed of a first conveyor belt device 9 and a second conveyor belt device 10, the fourth transmission shaft 21 is connected to the driving shaft 23 of the first conveyor belt device through the four-stage gear set 14, and the driving shaft 23 of the first conveyor belt device is connected to the driving shaft 24 of the second conveyor belt device through the coupling 22.

[0034] The first conveyor belt device 9 and the second conveyor belt device 10 are both composed of a conveyor belt, a driving shaft, a driven shaft, a conveyor belt bracket and a conveyor belt tensioning device; the driving shaft and the driven shaft are respectively arranged at the two ends of the conveyor belt bracket, and the conveyor belt is wound between the driving shaft and the driven shaft; the conveyor belt is made of PVC; Figure 6 As shown, the conveyor belt tensioning device includes a tensioning bracket 29, a tensioning wheel 27 and a tensioning spring 28. One end of the tensioning bracket 29 is connected to the conveyor belt bracket through the tensioning spring 28, and the other end of the tensioning bracket 29 is provided with a tensioning wheel 27, and the tensioning wheel 27 is tightened against the inner side of the downward transmission belt.

[0035] The ratchet counting mechanism consists of a ratchet transmission shaft 16, three counting ratchets 8 arranged side by side and at intervals on the ratchet transmission shaft 16, and a transmission belt 15. The ratchet transmission shaft 16 is connected to the output shaft of the driving motor 4 through the transmission belt 15, and drives the three counting ratchets 8 to rotate synchronously from one side of the conveyor belt device to the side of the bamboo stick collecting groove 5; the pitch of two adjacent teeth on the counting ratchet 8 = the diameter of the bamboo stick 26 + 1 to 3 mm; the limit switch 17 is arranged at the bottom of the arc-shaped shield 7, and its sensing side is located above the ratchet transmission shaft 16 between the two counting ratchets 8; the distance between the arc-shaped shield 7 and the top surface of the teeth of the counting ratchet 8 is less than the diameter of the bamboo stick 26.

[0036] The control system 25 is composed of a single chip microcomputer, a processor and a voice module; the processor and the voice module are connected to the single chip microcomputer respectively.

[0037] The following examples are implemented on the premise of the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[0038] [Example]

[0039] In this embodiment, the bamboo stick feeding hopper 1 is made of acrylic board, and the wall panels constituting the bamboo stick feeding hopper 1 are fixedly connected by chloroform as an adhesive to form a trapezoidal funnel shape. The bottom of the bamboo stick feeding hopper 1 is supported by 4 supporting columns.

[0040] The counting display screen 3 is mounted on the wall panel in front of the bamboo stick feed hopper 1. The counting display screen 3 and the wall panel of the bamboo stick feed hopper 1 are fixedly connected by M4×10 304 stainless steel round head cross screws. The counting display screen 3 is used to display the counted number and counting time of the bamboo sticks 26. The control panel 2 and the counting display screen 3 are mounted side by side on the front wall panel of the bamboo stick feed hopper 1. In this embodiment, a 5-inch high-definition display screen with a model of May5s is used as the counting display screen 3. The control panel 2 is provided with a start counting button, a stop counting button and a pause counting button for controlling the operation process of the bamboo stick counting device.

[0041] The top cover plate 6, the arc-shaped protective cover 7 and the bamboo skewer collecting groove 5 are all made of acrylic material.

[0042] The transmission process adopts a four-stage gear set meshing transmission, and the gear material is 45# steel. The driving motor 4 is used as the power device of the bamboo stick counting device. Figure 8 As shown, this embodiment uses a dual BTN7571 H-bridge motor drive circuit to control the drive motor 4, and the drive motor 4 is placed on the left side of the bamboo stick conveying counting box ( Figure 1 direction shown).

[0043] The control system 25 is placed on the bottom plate of the bamboo stick conveying counting box, and is composed of an STC89C52 single-chip microcomputer, a by6001mp3 voice module, a universal synchronous / asynchronous receiver and transmitter usart, and an im2596 integrated circuit. Through the im2596 integrated circuit, the output port of the STC89C52 single-chip microcomputer is connected to the trigger input port of the by6001mp3 voice module, and the asynchronous serial port data input and output ends of the by6001mp3 voice module are connected to the two ends of the universal synchronous / asynchronous receiver and transmitter usart.

[0044] The tensioning wheel 27 in the conveyor belt tensioning device is made of smooth galvanized aluminum alloy; the tensioning bracket 29 is made of an acrylic plate with a thickness of 4 mm; and the tensioning spring 28 is made of 304 stainless steel.

[0045] There are three counting ratchets 8 in total, and the material is 45# steel.

[0046] The limit switch 17 adopts a travel switch with a model of AZ-7144.

[0047] The bamboo sticks 26 in the bamboo stick feeding hopper 1 fall onto the two conveyor belts through the bottom outlet in turn, and are conveyed by the conveyor belts from one end of the bamboo stick entrance to one end of the bamboo stick exit; the width of the bottom outlet is the diameter of the bamboo stick 26 + 2 mm, which allows only one bamboo stick 26 to pass through while allowing a certain size and shape error in the diameter of the bamboo stick 26; when the bamboo stick 26 falls onto the conveyor belt, the surface friction of the PVC material gives the bamboo stick 26 an initial lateral velocity, so that the bamboo stick 26 is smoothly conveyed; the distance between the top cover plate 6 and the top surface of the conveyor belt is the diameter of the bamboo stick 26 + 3 mm, so it can be ensured that the bamboo sticks 26 can only be spread flat and not overlapped for conveyance.

[0048] When the bamboo stick 26 reaches the end of the conveyor belt, it is picked up by the counting ratchet 8 in sequence. The distance between two adjacent teeth of the counting ratchet is the diameter of the bamboo stick 26 + 1.5 mm, and the gap between the arc-shaped shield 7 and the top surface of the teeth of the counting ratchet 8 is smaller than the diameter of the bamboo stick 26, which can ensure that only one bamboo stick 26 can be carried between the two teeth of the counting ratchet 8 at the same time. If the bamboo stick 26 on the conveyor belt is tilted forward and backward along the conveying direction, the end of the bamboo stick 26 close to the counting ratchet 8 cannot smoothly enter between the teeth due to the existence of the above gap, until the other end of the bamboo stick 26 moves forward under the action of the conveyor belt, so that the bamboo stick 26 is parallel to the ratchet transmission shaft 16, the bamboo stick 26 can smoothly enter between the teeth of the counting ratchet 8 and be conveyed by it.

[0049] The bamboo sticks 26 carried by the counting ratchet 8 touch the limit switch 17 as the counting ratchet 8 rotates, so that the number of bamboo sticks 26 displayed on the counting display screen 3 increases by 1; after the counting ratchet 8 rotates 180°, the bamboo sticks 26 fall into the bamboo stick collecting groove 5 below under the action of their own weight, completing the collection of the bamboo sticks after counting.

[0050] The above description is only a preferred specific implementation manner 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 scheme and inventive concept 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 bamboo stick counting device with "double protection", characterized in that: The utility model comprises a bamboo stick feeding hopper, a bamboo stick conveying and counting box and a bamboo stick collecting trough; a bamboo stick inlet and a bamboo stick outlet are respectively arranged at two ends of the bamboo stick conveying and counting box, wherein the bamboo stick inlet is connected to the bottom outlet of the bamboo stick feeding hopper, and the bamboo stick outlet is located above the bamboo stick collecting trough; a digital display screen and a control panel are designed on the front of the bamboo stick conveying and counting box; a multi-stage gear transmission mechanism, two sets of conveyor belt devices arranged side by side, a transmission belt and a ratchet counting mechanism are arranged in the bamboo stick conveying and counting box, and the two sets of conveyor belt devices are arranged between the bamboo stick inlet and the bamboo stick outlet; a driving motor is arranged outside the bamboo stick conveying and counting box; the driving motor The conveyor belt device is driven to operate through a multi-stage gear transmission mechanism, and the ratchet counting mechanism is connected through a transmission belt to drive the counting ratchet to rotate, and the ratchet counting mechanism is arranged at the bamboo stick outlet and the end of the conveyor belt device; the bottom outlet of the bamboo stick feeding hopper only allows one bamboo stick to pass through at a time, and the two adjacent teeth of the counting ratchet can only transport one bamboo stick at a time; a limit switch is arranged in the ratchet counting mechanism for counting bamboo sticks; the limit switch is connected to the counting display screen through a control system; the control system is also connected to a control panel and a motor drive circuit, and the motor drive circuit is connected to the control end of the drive motor; The multi-stage gear transmission mechanism is a four-stage gear reduction transmission mechanism, the output shaft of the driving motor is connected to the first transmission shaft, the first transmission shaft is connected to the second transmission shaft through a first-stage gear set, the second transmission shaft and the third transmission shaft are connected through a second-stage gear set, and the third transmission shaft and the fourth transmission shaft are connected through a third-stage gear set; the conveyor belt device is composed of a first conveyor belt device and a second conveyor belt device, the fourth transmission shaft is connected to the driving shaft of the first conveyor belt device through a four-stage gear set, and the driving shaft of the first conveyor belt device is connected to the driving shaft of the second conveyor belt device through a coupling; The first conveyor belt device and the second conveyor belt device are both composed of a conveyor belt, a driving shaft, a driven shaft, a conveyor belt bracket and a conveyor belt tensioning device; the driving shaft and the driven shaft are respectively arranged at the two ends of the conveyor belt bracket, and the conveyor belt is wound between the driving shaft and the driven shaft; the conveyor belt is made of PVC; the conveyor belt tensioning device includes a tensioning bracket, a tensioning wheel and a tensioning spring, one end of the tensioning bracket is connected to the conveyor belt bracket through a tensioning spring, and the other end of the tensioning bracket is provided with a tensioning wheel, and the tensioning wheel is pressed against the inner side of the downward transmission belt; The ratchet counting mechanism consists of a ratchet transmission shaft, three counting ratchets arranged side by side and at intervals on the ratchet transmission shaft, and a transmission belt. The ratchet transmission shaft is connected to the output shaft of the driving motor through the transmission belt, and drives the three counting ratchets to rotate synchronously from one side of the conveyor belt device to the side of the bamboo stick collecting groove; the tooth pitch of two adjacent teeth on the counting ratchet = the diameter of the bamboo stick + 1 to 3 mm; the limit switch is arranged at the bottom of the arc-shaped protective cover, and its sensing side is located above the ratchet transmission shaft between the two counting ratchets; the distance between the arc-shaped protective cover and the top surface of the counting ratchet teeth is less than the diameter of the bamboo stick.

2. A bamboo stick counting device with "double protection" according to claim 1, characterized in that: The bamboo stick feeding hopper is a trapezoidal funnel structure with a large upper opening and a small lower opening. The length of the top entrance of the bamboo stick feeding hopper is greater than the length of the bamboo stick, and the width of the bottom exit of the bamboo stick feeding hopper is equal to the diameter of the bamboo stick + 1 to 3 mm. The bottom of the bamboo stick feeding hopper is supported and fixed by 4 supporting columns.

3. The bamboo stick counting device with "double protection" according to claim 1 is characterized in that: The bamboo stick conveying and counting box consists of a bottom plate, two wall plates, a top cover plate and an arc-shaped protective cover; wall plates are respectively arranged on both sides of the bottom plate, one end of the wall plate is fixedly connected to the supporting column of the bamboo stick feeding hopper, the arc-shaped protective cover is arranged on the outside of the counting ratchet, and a top cover plate is arranged between the arc-shaped protective cover and the corresponding side wall of the bamboo stick feeding hopper; the distance between the top cover plate and the top surface of the conveyor belt in the conveyor belt device is equal to the diameter of the bamboo stick + 1 to 3 mm.

4. The bamboo stick counting device with "double protection" according to claim 1 is characterized in that: The control system is composed of a single chip microcomputer, a processor and a voice module; the processor and the voice module are connected to the single chip microcomputer respectively.

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