Compact shelf power-down position determining device

Abstract

The invention relates to the technical field of compact shelving positioning, in particular to a compact shelving power-down position determining device which comprises a driving motor, a motor transmission rod, a main driving wheel, a chain, an auxiliary driving wheel, a gearbox and a positioning detection execution part. The driving motor, the gearbox and the positioning detection execution part are assembled on a compact shelving; a motor transmission rod is installed at the power output end of the driving motor, and the main driving wheel is installed on the motor transmission rod and connected with the motor transmission rod through a key. According to the power failure position determining device for the compact shelving, under the condition that the compact shelving is manually moved after being powered off, the current position of the compact shelving can be immediately and accurately positioned without re-initialization after the compact shelving is powered on again, so that the compact shelving runs stably and orderly, the working efficiency is improved, and the working efficiency is improved. And the user experience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of compact rack positioning, and in particular to a device for determining a power-off position of a compact rack. Background Art

[0002] The compact shelving is a frame structure that can move in a straight line along a small guide rail laid on the ground by installing axle wheels on the base of a double-column double-sided fixed frame, and multiple shelves can be brought together or separated as needed. The contact surfaces between the compact shelving frames usually use buffer mechanisms or magnetic strips to avoid collisions. There is a dustproof plate on the top and a rodent-proof device on the bottom, which has good dustproof, rodent-proof, moisture-proof and fireproof functions. Compared with traditional bookshelves, shelves, and file racks, compact shelving has a large file storage capacity and saves space.

[0003] At present, the positioning of compact shelving on the market can only measure position changes when there is power. Once the compact shelving loses power, the shelf position is manually changed. After power is restored, the shelf cannot know its current accurate position and needs to be reinitialized to find the "zero point" again. If it is not initialized, the movement process of the shelf will be chaotic, the operation will be unstable, and even collisions will occur. The initialization process is generally time-consuming and the user experience is poor. Summary of the invention

[0004] The purpose of the present invention is to provide a device for determining the power-off position of a compact shelving system, which can accurately locate the current position of the shelf immediately after power is restored, without the need for re-initialization, when the shelf is manually moved after the compact shelving system is powered off, so that the shelf can run smoothly and orderly, thereby improving the user experience.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: A device for determining the power-off position of a compact shelving system, comprising a drive motor, a motor transmission rod, a main drive wheel, a chain, a slave drive wheel, a gearbox and a positioning detection execution unit, wherein the drive motor, the gearbox and the positioning detection execution unit are assembled on the compact shelving system; a motor transmission rod is mounted on the power output end of the drive motor, the main drive wheel is mounted on the motor transmission rod and is connected to the motor transmission rod through a key; a box power input shaft is mounted at the power input end of the gearbox, and a slave drive wheel is mounted on the box power input shaft; the main drive wheel is connected to the slave drive wheel through a chain, and the slave drive wheel drives the power input shaft of the gearbox to rotate, and the gearbox drives the positioning detection execution unit to work through a transmission structure after changing the speed of the rotation of the motor transmission rod.

[0006] The positioning detection execution unit includes a fixed frame, a transmission wheel train assembly, a reversing wheel train assembly and an electronic measuring mechanism. The fixed frame is installed on the frame of the compact shelving, and the transmission wheel train assembly is installed in the fixed frame. The transmission wheel train assembly receives the rotation output by the gearbox through the transmission structure, and the reversing wheel train assembly is arranged on the lower side of the transmission wheel train assembly; the reversing wheel train assembly and the transmission wheel train assembly transmit power through tooth contact; the electronic measuring mechanism is installed on the fixed frame, and the lower side of the electronic measuring mechanism is arranged in the transmission wheel train assembly at intervals.

[0007] The reversing gear train assembly includes a first reversing transmission gear, a second reversing transmission gear and a reversing gear shaft. The reversing gear shaft is installed on a fixed frame. The first reversing transmission gear and the second reversing transmission gear are arranged on the reversing gear shaft. The first reversing transmission gear and the second reversing transmission gear are installed on the reversing gear shaft through bearings.

[0008] The transmission gear train assembly includes an input transmission wheel, a first-stage transmission wheel, a second-stage transmission wheel, a third-stage transmission wheel and a transmission wheel shaft. The input transmission wheel, the first-stage transmission wheel, the second-stage transmission wheel and the third-stage transmission wheel are arranged on the transmission wheel shaft. The input transmission wheel is connected to the first-stage transmission wheel through a hard connection. The first-stage transmission wheel drives the second-stage transmission wheel to rotate through a first reversing transmission gear. The second-stage transmission wheel drives the third-stage transmission wheel to rotate through a second reversing transmission gear.

[0009] Furthermore, one rotation of the previous transmission wheel will drive the next transmission wheel to rotate 1 / 10 through the reversing transmission gear.

[0010] Furthermore, 20 meshing teeth are evenly distributed on the A side of the input transmission wheel, the second-stage transmission wheel, and the third-stage transmission wheel. The second-stage transmission wheel is meshed with the first reversing transmission gear through the meshing teeth; the third-stage transmission wheel is meshed with the second reversing transmission gear through the meshing teeth.

[0011] Furthermore, eight mating teeth are evenly arranged on the first reversing transmission gear and the second reversing transmission gear, and two contact teeth are respectively arranged on the B side of the first-stage transmission wheel and the second-stage transmission wheel. Through meshing, the previous-stage transmission wheel rotates one circle and the next-stage transmission wheel rotates 1 / 10, thereby completing the transmission of the position change of the compact shelving at each transmission rotation position, ensuring that the combination of each transmission wheel within the effective moving range of the compact shelving is unique and meets the error requirements.

[0012] Furthermore, fan-shaped hole slots I, fan-shaped hole slots II and fan-shaped hole slots III, as well as fan-shaped connections I, fan-shaped connections II and fan-shaped connections III are arranged on the transmission wheel bodies of the first-stage transmission wheel, the second-stage transmission wheel and the third-stage transmission wheel. The fan-shaped connections I, the fan-shaped connections II and the fan-shaped connections III are arranged at intervals with the fan-shaped hole slots I, the fan-shaped hole slots II and the fan-shaped hole slots III, and the angle between the fan-shaped empty slots I and the fan-shaped connection I is 89°; the angle between the fan-shaped hole slots II and the fan-shaped connection II is 28°; the angle between the fan-shaped hole slots III and the fan-shaped connection III is 59°.

[0013] Furthermore, the electronic measuring mechanism is mainly composed of a main board and four infrared transceiver boards; five infrared receiving tubes are arranged on one side of each infrared transceiver board; five infrared transmitting lamps are arranged on the other side of each infrared transceiver board; the angle between adjacent infrared transmitting lamps is 30°; two adjacent transceiver boards form a transceiver group, and the first-stage transmission wheel, the second-stage transmission wheel, and the third-stage transmission wheel are located between the two adjacent transceiver board groups; each infrared transceiver board is welded to the main board by 90-degree straight insertion, and the main board is fixed to the transmission wheel fixing frame by fastening screws.

[0014] The beneficial effects of the present invention are as follows: a device for determining the power-off position of a compact shelving provided by the present invention can, when the compact shelving is manually moved after power is cut off, immediately and accurately locate the current position of the shelf without the need for re-initialization after power is turned on, so that the shelf can run smoothly and orderly, thereby improving the user experience. Specifically, each wheel in the multi-stage transmission gear train (transmission gear train assembly) of the present invention has the same special hole groove structure, and the rotation of the lower-level transmission wheel will drive the rotation of the higher-level transmission wheel; two circuit boards are arranged on both sides of each transmission wheel in the mechanical structure, and a plurality of infrared transmitting lamps are designed on one side of the circuit board, and an infrared receiving tube is arranged on the corresponding other side of the circuit board. When the aforementioned transmission wheel rotates, the hole grooves arranged on the wheel will periodically block the path from the transmitting lamp to the receiving tube. The rotation position of each level of transmission wheels can be determined by controlling the infrared emission and reading the infrared receiving state through the single-chip microcomputer control circuit, and then the position of the compact shelving can be inferred, and finally output to other devices that need to determine the position of the compact shelving through the communication interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation of the device for determining the power failure position of a compact rack according to the present invention; Figure 2 It is an overall schematic diagram of the device for determining the power failure position of a compact rack according to the present invention; Figure 3 It is a structural schematic diagram of the positioning detection execution unit in the present invention; Figure 4It is a schematic diagram of the installation structure of the transmission gear train assembly and the reversing gear train assembly in the present invention; Figure 5 It is a structural schematic diagram of the electronic measuring mechanism in the present invention; Figure 6 It is a schematic diagram of the structure of the transmission wheel in the present invention; Figure 7 It is a schematic side view of the transmission wheel in the present invention; The numbers in the figure are: 1-driving motor, 2-motor transmission rod, 3-main driving wheel, 4-chain, 5-slave driving wheel, 6-gearbox, 7-positioning detection execution part, 8-fan-shaped hole slot I, 9-fan-shaped hole slot II, 10-fan-shaped hole slot III, 11-fan-shaped connection I, 12-fan-shaped connection II, 13-fan-shaped connection III, 14-meshing teeth, 15-contact teeth, 71-fixed frame, 72-transmission gear train assembly, 73-reversing gear train assembly, 74-electronic measuring mechanism, 721-input transmission wheel, 722-first stage transmission wheel, 723-second stage transmission wheel, 724-third stage transmission wheel, 725-transmission wheel shaft, 731-first reversing transmission gear, 732-second reversing transmission gear, 733-reversing gear shaft, 741-main board, 742-infrared transceiver board, 743-infrared receiving tube, 744-infrared transmitting lamp, A-compact shelving, B-compact shelving power-off position determination device. DETAILED DESCRIPTION

[0016] Specific embodiment 1: The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in 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. It should be noted that: in the present invention, if there is no special description, all the implementation methods and preferred implementation methods mentioned in this article can be combined with each other to form a new technical solution. In the present invention, if there is no special description, all the technical features and preferred features mentioned in this article can be combined with each other to form a new technical solution. In the present invention, unless otherwise specified, each operation step is performed in order. Unless otherwise specified, the professional and scientific terms used in this article have the same meaning as those familiar to those skilled in the art. In addition, any method similar or equal to the recorded content can also be applied to the present invention.

[0017] As the specification of the present invention Figure 1 , Instruction Manual Figure 2As shown, in order to solve the problem that the existing compact shelving positioning device can only measure position changes when there is electricity, once the compact shelving loses power, it needs to be reinitialized to find the "zero point" again. If it is not initialized, the movement process of the frame will be chaotic and disordered, the operation will be unstable or even collide, and the initialization process is generally time-consuming, and the user experience is poor. The present invention provides a compact shelving power-off position determination device, which mainly includes a drive motor 1, a motor transmission rod 2, a main drive wheel 3, a chain 4, a slave drive wheel 5, a gearbox 6, a transmission structure and a positioning detection execution unit 7, wherein the drive motor 1 , a gearbox 6 and a positioning detection execution unit 7 are assembled on the compact shelving; a motor transmission rod 2 is installed on the power output end of the driving motor 1, and the main driving wheel 3 is installed on the motor transmission rod 2 and connected to the motor transmission rod 2 through a key; a box power input shaft is installed at the power input end of the gearbox 6, and a slave driving wheel 5 is installed on the box power input shaft; the main driving wheel 3 is connected to the slave driving wheel 5 through a chain 4, and the slave driving wheel 5 drives the power input shaft of the gearbox 6 to rotate, and the gearbox 6 changes the rotation of the motor transmission rod 2 and drives the positioning detection execution unit 7 to work through the transmission structure.

[0018] As the specification of the present invention Figure 3 As shown, the positioning detection execution part 7 in the present invention includes a fixed frame 71, a transmission wheel train assembly 72, a reversing wheel train assembly 73 and an electronic measuring mechanism 74. The fixed frame 71 is installed on the frame of the compact shelving, and the transmission wheel train assembly 72 is installed in the fixed frame 71. The transmission wheel train assembly 72 receives the rotation output by the gearbox 6 through the transmission structure, and the reversing wheel train assembly 73 is arranged on the lower side of the transmission wheel train assembly 72; the reversing wheel train assembly 73 and the transmission wheel train assembly 72 transmit power through tooth contact; the electronic measuring mechanism 74 is installed on the lower side of the fixed frame 71, and the upper part of the electronic measuring mechanism 74 is arranged in the transmission wheel train assembly 72.

[0019] As the specification of the present invention Figure 3 And the instruction manual Figure 4 As shown, the reversing gear train assembly 73 in the present invention includes a first reversing transmission gear 731, a second reversing transmission gear 732 and a reversing gear shaft 733. The reversing gear shaft 733 is installed on the fixed frame 71, and the first reversing transmission gear 731 and the second reversing transmission gear 732 are arranged on the reversing gear shaft 733. The first reversing transmission gear 731 and the second reversing transmission gear 732 are installed on the reversing gear shaft 733 through bearings.

[0020] As the specification of the present invention Figure 3 , Instruction Manual Figure 4 , Instruction Manual Figure 6 And the instruction manual Figure 7As shown, the transmission wheel train assembly 72 of the present invention includes an input transmission wheel 721, a first-stage transmission wheel 722, a second-stage transmission wheel 723, a third-stage transmission wheel 724 and a transmission wheel shaft 725, wherein the input transmission wheel 721, the first-stage transmission wheel 722, the second-stage transmission wheel 723 and the third-stage transmission wheel 724 are arranged on the transmission wheel shaft 725, the input transmission wheel 721 is connected to the first-stage transmission wheel 722 by a hard connection, and the second-stage transmission wheel 723 and the third-stage transmission wheel 724 are respectively rotatably assembled on the transmission wheel shaft 725; the first-stage transmission wheel 722 drives the second-stage transmission wheel 723 to rotate through the first reversing transmission gear 731, and the second-stage transmission wheel 723 drives the third-stage transmission wheel 724 to rotate through the second reversing transmission gear 732, and the previous stage transmission wheel rotates one circle, which drives the next stage transmission wheel to rotate 1 / 10 through the reversing transmission gear. There are 20 meshing teeth 14 evenly distributed on the A side of the input transmission wheel 721, the second-stage transmission wheel 723, and the third-stage transmission wheel 724. The second-stage transmission wheel 723 meshes with the first reversing transmission gear 731 through the meshing teeth 14; the third-stage transmission wheel 724 meshes with the second reversing transmission gear 732 through the meshing teeth 14. Eight matching teeth are evenly arranged on the reversing transmission gears (the first reversing transmission gear 731 and the second reversing transmission gear 732), and two contact teeth 15 are respectively arranged on the B side of the first-stage transmission wheel 722 and the second-stage transmission wheel 723. In this way, through meshing, the previous-stage transmission wheel (such as the first-stage transmission wheel 722) rotates one circle and the next-stage transmission wheel (such as the second-stage transmission wheel 723) rotates 1 / 10, thereby completing the transmission of the position change of the compact rack at each transmission rotation position, ensuring that the combination of each transmission wheel within the effective moving range of the compact rack is unique and meets the error requirements. Fan-shaped hole slots I8, fan-shaped hole slots II9 and fan-shaped hole slots III10, as well as fan-shaped connections I11, fan-shaped connections II12 and fan-shaped connections III13 are arranged on the transmission wheel bodies of the first-stage transmission wheel 722, the second-stage transmission wheel 723 and the third-stage transmission wheel 724. The fan-shaped connections I11, fan-shaped connections II12 and fan-shaped connections III13 and the fan-shaped hole slots I8, fan-shaped hole slots II9 and fan-shaped hole slots III10 are arranged at intervals, and the angle between the fan-shaped empty slot I8 and the fan-shaped connection I11 is 89°; the angle between the fan-shaped hole slot II9 and the fan-shaped connection II12 is 28°; the angle between the fan-shaped hole slot III10 and the fan-shaped connection III13 is 59°.

[0021] As the specification of the present invention Figure 5As shown, the electronic measuring mechanism 74 in the present invention is mainly composed of a main board 741 and four infrared transceiver boards 742; five infrared receiving tubes 743 are arranged on one side of each infrared transceiver board 742; five infrared emitting lamps 744 are arranged on the other side of each infrared transceiver board 742; the angle between adjacent infrared emitting lamps 744 is 30°; two adjacent transceiver boards form a transceiver group, and the first-stage transmission wheel 722, the second-stage transmission wheel 723, and the third-stage transmission wheel 724 are respectively located in the middle of two adjacent transceiver board groups; each infrared transceiver board 742 is welded to the main board 741 by 90-degree straight insertion, and the main board 741 is fixed to the transmission wheel fixing frame 71 by fastening screws.

[0022] The present invention provides a device for determining the position of a compact rack that loses power. The device uses a multi-stage transmission wheel to drive the position change of the compact rack. The highest-level transmission wheel rotates less than one circle within the entire motion range of the compact rack. That is, each position of the compact rack within the effective motion range corresponds to a unique position state composed of the transmission wheels of each stage. The position of the compact rack can be inferred by determining the position state of the transmission wheels of each stage using the photoelectric principle. Specifically, each wheel body of the first-stage transmission wheel 722, the second-stage transmission wheel 723, the third-stage transmission wheel 724 and the input transmission wheel 721 in the device for determining the position of a compact rack that loses power has the same special fan-shaped hole groove structure. The rotation of the lower-stage transmission wheel will drive the higher-stage transmission wheel to rotate. The transmission wheel rotates; two circuit boards (infrared transceiver boards 742) are arranged on both sides of each transmission wheel in the mechanical structure, and a plurality of infrared emitting lamps 744 are designed on the circuit board on one side of the infrared transceiver board 742, and an infrared receiving tube 743 is arranged on the corresponding circuit board (infrared transceiver board 742) on the other side; the entire device of the power-off position determination device of the compact shelving of the present invention is arranged next to the transmission shaft at the bottom of the compact shelving, and the horizontal position change of the compact shelving is converted into the rotation of the lowest level (hereinafter referred to as the first level for the convenience of description) transmission wheel of the device by arranging gears on the transmission shaft, and the entire device is provided with 3 (the number can be increased or decreased, and the greater the number, the higher the accuracy) transmission wheels. When the first-stage transmission wheel 722 rotates one circle, it will drive the second-stage transmission wheel 723 to rotate 1 / 10 (not limited to 1 / 10, it can also be other values) through the gear (first reversing transmission gear 731). Similarly, when the second-stage transmission wheel 723 rotates one circle, it will drive the third-stage transmission wheel 724 to rotate 1 / 10 through the gear (second reversing transmission gear 732). If the first-stage transmission wheel 722 rotates 1 / 10 when the compact shelving moves 1 cm on the mechanical transmission structure, then the three-stage transmission wheel can cover the movement range of the compact shelving from 0 to 999 cm, and the movement range of the compact shelving is usually within 2 m. Then, by adjusting the transmission ratio, the first-stage transmission wheel 722 can rotate 1 / 10 when the compact shelving moves 2 mm. At the same time, since the electronic sampling part can achieve a resolution of 1 / 30 of the rotation change of the transmission wheel, the three-stage transmission wheel structure can ensure that the measurement error of the compact shelving movement is within 0.67 mm, and the positioning error of the compact shelving is within 1 mm, which can meet the positioning accuracy requirements of most compact shelving scenarios.When the transmission wheel rotates, the holes and slots set on the transmission wheel (first-stage transmission wheel 722, second-stage transmission wheel 723, and third-stage transmission wheel 724) will periodically block the path from the transmitting lamp to the receiving tube. By controlling the infrared emission and reading the infrared receiving state through the single-chip control circuit, the rotation position of each stage of the transmission wheel can be determined, and then the position of the compact rack can be reversed, and finally output to other devices that need to determine the position of the compact rack through the communication interface; specifically, when the transmission wheel rotates, the five infrared transmitting lamps 744 on a transceiver plug-in board (infrared transceiver plug-in board 742) are lit in turn, and the infrared receiving tube 743 at the corresponding position is read at the same time. If the signal can be read, it means that the infrared transceiver path of the pair is unobstructed, otherwise it means that the infrared transceiver path of the pair is blocked. Repeat the above process for the five pairs of infrared transceivers in the same group, and it can be obtained whether the transceiver paths of the five pairs of infrared transceivers are unobstructed. Based on the special hole and slot design of the transmission wheel, the position state of a transmission wheel can be determined. Repeating the above operation on other groups of infrared transceiver pairs can obtain the position status of the three transmission wheels, and then the position of the compact shelving can be calculated based on the transmission ratio of the linear motion of the compact shelving to the rotation of the transmission wheel.

[0023] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A device for determining the power failure position of a compact rack, characterized in that: The invention comprises a driving motor (1), a motor transmission rod (2), a main driving wheel (3), a chain (4), a slave driving wheel (5), a gearbox (6) and a positioning detection execution unit (7), wherein the driving motor (1), the gearbox (6) and the positioning detection execution unit (7) are assembled on a compact rack; a motor transmission rod (2) is mounted on the power output end of the driving motor (1), the main driving wheel (3) is mounted on the motor transmission rod (2) and is connected to the motor transmission rod (2) through a key; a box power input shaft is mounted at the power input end of the gearbox (6), and a slave driving wheel (5) is mounted on the box power input shaft; the main driving wheel (3) is connected to the slave driving wheel (5) through a chain (4), the slave driving wheel (5) drives the power input shaft of the gearbox (6) to rotate, and the gearbox (6) drives the positioning detection execution unit (7) to work through a transmission structure after changing the speed of the rotation of the motor transmission rod (2); The positioning detection execution unit (7) comprises a fixed frame (71), a transmission wheel train assembly (72), a reversing wheel train assembly (73) and an electronic measuring mechanism (74). The fixed frame (71) is installed on the frame of the compact shelving. The transmission wheel train assembly (72) is installed in the fixed frame (71). The transmission wheel train assembly (72) receives the rotation output by the gearbox (6) through the transmission structure. The reversing wheel train assembly (73) is arranged on the lower side of the transmission wheel train assembly (72). The reversing wheel train assembly (73) and the transmission wheel train assembly (72) transmit power through tooth contact. The electronic measuring mechanism (74) is installed on the fixed frame (71), and the lower side of the electronic measuring mechanism (74) is arranged in the transmission wheel train assembly (72) at an interval.

2. The device for determining the power failure position of a compact rack according to claim 1, characterized in that: The reversing gear train assembly (73) comprises a first reversing transmission gear (731), a second reversing transmission gear (732) and a reversing gear shaft (733); the reversing gear shaft (733) is mounted on a fixed frame (71); the first reversing transmission gear (731) and the second reversing transmission gear (732) are arranged on the reversing gear shaft (733); the first reversing transmission gear (731) and the second reversing transmission gear (732) are mounted on the reversing gear shaft (733) via bearings.

3. The device for determining the power failure position of a compact rack according to claim 2, characterized in that: The transmission gear train assembly (72) comprises an input transmission wheel (721), a first-stage transmission wheel (722), a second-stage transmission wheel (723), a third-stage transmission wheel (724) and a transmission wheel shaft (725). The input transmission wheel (721), the first-stage transmission wheel (722), the second-stage transmission wheel (723) and the third-stage transmission wheel (724) are arranged on the transmission wheel shaft (725). The input transmission wheel (721) is connected to the first-stage transmission wheel (722) through a hard connection. The first-stage transmission wheel (722) drives the second-stage transmission wheel (723) to rotate through a first reversing transmission gear (731). The second-stage transmission wheel (723) drives the third-stage transmission wheel (724) to rotate through a second reversing transmission gear (732).

4. The device for determining the power failure position of a compact rack according to claim 3, characterized in that: (20) meshing teeth (14) are evenly distributed on the A side of the input transmission wheel (721), the second-stage transmission wheel (723), and the third-stage transmission wheel (724); the second-stage transmission wheel (723) is meshed with the first reversing transmission gear (731) through the meshing teeth (14); and the third-stage transmission wheel (724) is meshed with the second reversing transmission gear (732) through the meshing teeth (14).

5. The device for determining the power failure position of a compact rack according to claim 3, characterized in that: Eight matching teeth are evenly arranged on the first reversing transmission gear (731) and the second reversing transmission gear (732), and two contact teeth (15) are respectively arranged on the B side of the first-stage transmission wheel (722) and the second-stage transmission wheel (723). In this way, through meshing, the previous-stage transmission wheel rotates one circle and the next-stage transmission wheel rotates 1 / 10, thereby completing the transmission of the position change of the compact shelving at each transmission rotation position, ensuring that the combination of each transmission wheel within the effective moving range of the compact shelving is unique and meets the error requirements.

6. The device for determining the power failure position of a compact rack according to claim 4, characterized in that: The transmission wheel bodies of the first-stage transmission wheel (722), the second-stage transmission wheel (723) and the third-stage transmission wheel (724) are provided with fan-shaped hole slots I (8), fan-shaped hole slots II (9) and fan-shaped hole slots III (10), as well as fan-shaped connections I (11), fan-shaped connections II (12) and fan-shaped connections III (13). The fan-shaped connections I (11), fan-shaped connections II (12) and fan-shaped connections III (13) are arranged alternately with the fan-shaped hole slots I (8), fan-shaped hole slots II (9) and fan-shaped hole slots III (10), and the angle between the fan-shaped hole slots I (8) and the fan-shaped connection I (11) is 89 degrees; the angle between the fan-shaped hole slots II (9) and the fan-shaped connection II (12) is 28 degrees; and the angle between the fan-shaped hole slots III (10) and the fan-shaped connection III (13) is 59 degrees.

7. The device for determining the power failure position of a compact rack according to claim 3, characterized in that: The electronic measuring mechanism (74) is mainly composed of a main board (741) and four infrared transceiver boards (742); five infrared receiving tubes (743) are arranged on one side of each infrared transceiver board (742); five infrared emitting lamps (744) are arranged on the other side of each infrared transceiver board (742); the angle between adjacent infrared emitting lamps (744) is (30) degrees; two adjacent transceiver boards form a transceiver group, and the first-stage transmission wheel (722), the second-stage transmission wheel (723), and the third-stage transmission wheel (724) are located between the two adjacent transceiver board groups; each infrared transceiver board (742) is welded to the main board (741) by 90-degree straight insertion, and the main board (741) is fixed to the transmission wheel fixing frame (71) by fastening screws.

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