An oil injection control method for driving a hanging system

Abstract

The present invention provides an oil injection control method for hanging system driving, which relates to the technical field of hanging system, and includes the following steps: S1: obtaining the mass of the mounted cargo and obtaining the unit oil injection amount; S2: judging whether the remaining lubricating oil is sufficient; if so, the hanging frame is transported and S3 is executed; otherwise, an alarm is issued; S3: obtaining the temperature of the first transmission gear and the second transmission gear; S4: judging whether the temperature of the first transmission gear and the second transmission gear is too high, if so, the unit oil injection amount of lubricating oil is injected into the first transmission gear, and S3 is returned; otherwise, S5 is executed; S5: judging whether the hanging frame reaches a predetermined position, if so, the transportation is terminated; otherwise, S3 is returned. The present invention is simple and convenient, and effectively controls the oil injection amount according to the mounted amount and the hanging operation parameters, effectively avoids product stains and gear wear, and can be applied to automatic oil injection for long-term hanging transportation.

Description

Technical Field

[0001] The present invention relates to the technical field of suspension systems, and in particular, to an oil injection control method for suspension system driving. Background Art

[0002] The intelligent clothing hanging system is an automated production equipment, mainly used in the clothing industry, to increase the production rate of each link of clothing making and reduce labor costs. The clothing hanging system is also called the clothing production distribution system. The basic concept of the clothing hanging system is to serve the clothing production process. It automatically sends it to the operator of the next process according to the processing procedures and sections input in advance. The existing clothing hanging systems are mostly hanging transport tracks, which achieve the purpose of clothing hanging transportation by driving the hanging racks with hanging clothes to run on the transport track.

[0003] However, the hanging rack is transported on the transport track, and it is inevitable to use chains or gears, which need to be lubricated. For example, the Chinese patent utility model patent CN216302450U discloses a transmission device of an intelligent clothing hanging system, including a housing and a chain body, the left end of the top of the housing inner cavity is connected to a second gear plate by a rotating shaft, the right end of the top of the housing inner cavity is connected to a first gear plate by a rotating shaft, the first gear plate is connected to the second gear plate by the chain body, the right end of the top of the housing is fixedly connected to a motor, the output shaft of the motor is fixedly connected to the first gear plate, the bottom of the chain body is connected to a movable block by a rotating shaft, and the upper part of the left end of the back of the housing inner cavity is fixedly connected to a nozzle. The above utility model solves the problem that the current intelligent clothing hanging system transmission device is not convenient for people to apply lubricating oil, and the machine needs to be stopped during the application of lubricating oil, which is not convenient for people to use.

[0004] However, the following problems still exist in the transportation of the above-mentioned hanging system: the hanging objects hung under the hanging rack are clothes or related parts, which have high requirements for cleanliness, and the oil filling position is located above the running track of the hanging objects. If the oil filling amount is not well controlled, too much oil will cause stains on the products, and too little oil will cause gear wear. In addition, the hanging system has a long running time during production, and the gears' demand for oil will change, making it difficult to control the oil filling amount.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable oil injection control method for the suspension system drive. Summary of the invention

[0006] The object of the present invention is to provide an oil injection control method for a suspension system drive, which is simple and convenient, can effectively control the oil injection volume according to the hanging weight and the hanging operation parameters, effectively avoid product stains and gear wear, and can be applied to the automatic oil injection of long-term running hanging transportation.

[0007] To achieve the above object, the present invention is realized by adopting the following technical solutions:

[0008] An oil injection control method for a suspension system drive, applicable to a suspension drive structure with an oil injection function, including a transportation track, a suspension rack arranged on the transportation track, and a drive machine for driving the suspension rack to run on the transportation track. A first rotating wheel and a second rotating wheel are arranged on the suspension rack on both sides of the transportation track respectively. The output shaft of the drive machine is provided with a driving gear. The first rotating wheel is coaxially provided with a first driven gear connected to the driving gear through a first transmission gear. The second rotating wheel is coaxially provided with a second driven gear connected to the first transmission gear through a second transmission gear. An oil injection platform is arranged on the side of the first transmission gear, and the oil injection platform is connected to an oil storage chamber for storing lubricating oil; the method includes the following steps:

[0009] S1: When there is goods suspended below the suspension rack, obtain the mass of the suspended goods to obtain the unit oil injection volume.

[0010] S2: Judge whether the remaining amount of lubricating oil in the oil storage chamber is greater than the predetermined oil volume; if so, start the drive machine to transport the suspension rack and execute step S3; otherwise, issue an alarm.

[0011] S3: Obtain the temperatures of the first transmission gear and the second transmission gear.

[0012] S4: Judge whether the temperature of the first transmission gear is higher than the first predetermined temperature value and the temperature of the second transmission gear is higher than the second predetermined temperature value. If so, the oil injection platform injects the lubricating oil with the unit oil injection volume into the first transmission gear and returns to step S3; otherwise, execute step S5.

[0013] S5: Judge whether the suspension rack reaches the predetermined position. If so, end the transportation; otherwise, return to step S3.

[0014] As a preference of the present invention, a weighing sensor and a controller for electrically connecting with the weighing sensor are arranged on the suspension rack;

[0015] When executing step S1, when there is goods suspended below the suspension rack, the controller obtains the mass of the suspended goods obtained by the weighing sensor.

[0016] Preferably, when performing step S1, the controller queries the pre-saved unit fuel injection volume comparison table, and obtains the unit fuel injection volume based on the suspended cargo mass and the driving machine operation duration.

[0017] Preferably, before performing step S2, a predetermined fuel volume value is calculated based on the unit fuel injection volume and the transportation track length.

[0018] Preferably, a first temperature sensor facing the first transmission gear and a second temperature sensor facing the second transmission gear are provided on the fuel injection table;

[0019] When performing step S3, the temperature of the first transmission gear is obtained through the first temperature sensor, the temperature of the second transmission gear is obtained through the second temperature sensor, and the temperature values of the first transmission gear and the second transmission gear are sent to the controller.

[0020] Preferably, a pneumatic oil injector electrically connected to the controller is provided in the oil storage chamber;

[0021] When performing step S4, the controller controls the pneumatic oil injector to push the lubricating oil of the unit fuel injection volume through the fuel injection table and inject it to the first transmission gear.

[0022] Preferably, the second predetermined temperature is not less than the first predetermined temperature.

[0023] Preferably, when performing step S4, it specifically includes the following steps:

[0024] S41: Determine whether the temperature of the first transmission gear is higher than the first predetermined temperature value. If so, perform step S42; otherwise, do not perform the operation;

[0025] S42: Generate a second predetermined temperature value according to the temperature of the first transmission gear;

[0026] S43: Determine whether the temperature of the second transmission gear is higher than the second predetermined temperature value. If so, inject the lubricating oil of the unit fuel injection volume to the first transmission gear through the fuel injection table and return to step S3; otherwise, do not perform the operation.

[0027] Preferably, when performing step S42, the second predetermined temperature value is k times the temperature of the first transmission gear, and the value of k is not less than 1.05.

[0028] Preferably, when performing step S2, when starting the driving machine for the hanging rack transportation, the driving speed of the driving machine is obtained;

[0029] Before performing step S42, the value of k is obtained according to the driving speed of the driving machine.

[0030] As a preference of the present invention, when performing step S1, when there is cargo suspended below the hanging rack, while obtaining the mass of the suspended cargo, the target position of the hanging rack operation is obtained, which is the predetermined position.

[0031] When performing step S5, it is judged whether the hanging rack reaches the predetermined position. If so, the transportation ends and the drive machine stops working; otherwise, it returns to step S3.

[0032] The beneficial effect of an oil injection control method for driving a hanging system of the present invention lies in that it is simple and convenient, effectively controls the oil injection volume according to the hanging load and the hanging operation parameters, effectively avoids product stains and gear wear, and can be applicable to automatic oil injection for long-term running hanging transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic flow chart of an oil injection control method for driving a hanging system of the present invention;

[0034] Figure 2 is a schematic structural diagram of a hanging system drive with an oil injection function in an oil injection control method for driving a hanging system of the present invention;

[0035] In the figure: 1, transportation track; 2, hanging rack; 21, first rotating wheel; 22, first driven gear; 23, first driving gear; 24, second driven gear; 25, second driving gear; 3, drive machine; 31, driving gear; 4, oil injection platform; 41, oil storage chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0037] In the following description, the terms "first" and "second" are only for the purpose of description and cannot be construed as indicating or implying relative importance. The following description provides multiple embodiments of the present application. Different embodiments can be replaced or combined. Therefore, the present application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present application should also be considered to include embodiments containing all other possible combinations of A, B, C, and D, even though such an embodiment may not be explicitly described in the following content.

[0038] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the elements described without departing from the scope of the content of this application. Various processes or components may be appropriately omitted, substituted, or added to each example. For example, the methods described may be performed in a different order than the order described, and various steps may be added, omitted, or combined. In addition, the features described for some examples may be combined into other examples.

[0039] Embodiment 1: As Figure 1 , 2 shown, Figure 1 is a schematic flow chart of an oil injection control method for a suspension system drive according to the present invention, Figure 2 is a schematic structural diagram of a suspension system drive with an oil injection function in an oil injection control method for a suspension system drive according to the present invention. It is only one embodiment of the present invention. An oil injection control method for a suspension system drive is applicable to a suspension drive structure with an oil injection function, including a transport track 1, a suspension rack 2 provided on the transport track 1, and a drive machine 3 for driving the suspension rack 2 to run on the transport track 1. A first rotating wheel 21 and a second rotating wheel are provided on the suspension rack 2 on both sides of the transport track 1 respectively. A driving gear 31 is provided on the output shaft of the drive machine 3. A first driven gear 22 connected to the driving gear 31 through a first transmission gear 23 is coaxially provided on the first rotating wheel 21. A second driven gear 24 connected to the first transmission gear 23 through a second transmission gear 25 is coaxially provided on the second rotating wheel. An oil injection platform 4 is provided on the side of the first transmission gear 23. The oil injection platform 4 is connected to an oil storage chamber 41 for storing lubricating oil;

[0040] In the suspension system drive with an oil injection function of this method, the drive machine 3 is provided on the suspension rack 2. When the drive machine 3 works, it drives the suspension rack 2 and the drive machine 3 provided on the suspension rack 2 to displace along the transport track 1. And a hanging object such as clothes or a hanging basket is provided below the suspension rack 2. The work of the drive machine 3 drives the transportation of the hanging object.

[0041] The driving principle of the driving machine 3 is as follows: When the driving machine 3 works, the driving gear 31 and the output shaft of the driving machine 3 rotate coaxially. The rotation of the driving gear 31 drives the first transmission gear 23 to rotate meshingly. The first transmission gear 23 then drives the first driven gear 22 and the second transmission gear 25 to rotate meshingly. The second transmission gear 25 then drives the second driven gear 24 to rotate meshingly. Finally, the first rotating wheel 21 and the first driven gear 22 rotate coaxially, the second rotating wheel and the second driven gear 24 rotate coaxially, and the first rotating wheel 21 and the second rotating wheel are respectively located on both sides of the transport track 1 and rotate, driving the hanging frame 2 to displace along the transport track 1.

[0042] Certainly, rubber outer rings are provided on the outer sides of the first rotating wheel 21 and the second rotating wheel to increase the friction between them and the transport track 1, so as to make the operation of the hanging frame 2 more stable.

[0043] During the meshing process of the driving gear 31, the first transmission gear 23, the first driven gear 22, the second transmission gear 25 and the second driven gear 24, it is necessary to inject oil for lubrication. In the present invention, oil is injected through the oil injection platform 4 on the side of the first transmission gear 23. Specifically, the lubricating oil stored in the oil storage cavity 41 reaches the oil injection platform 4 through the oil injection pipe and is injected into the first transmission gear 23 from the side of the oil injection platform 4 close to the first transmission gear 23.

[0044] An oil injection control method for driving a hanging system according to the present invention includes the following steps:

[0045] S1: When there is a load suspended below the hanging frame, obtain the mass of the suspended load to obtain the unit oil injection volume;

[0046] As an option in the embodiment of the present application, the load suspended below the hanging frame may be clothes or clothing products, and its weight is variable. When suspended below the hanging frame, for loads of different weights, the pressure of the hanging frame on the transport track is different, and the meshing pressures of the driving gear 31, the first transmission gear 23, the first driven gear 22, the second transmission gear 25 and the second driven gear 24 are also different, so the amount of lubricating oil required is also different.

[0047] Therefore, when there is a load suspended below the hanging frame, it is necessary to obtain the mass of the suspended load and obtain the unit oil injection volume according to this mass.

[0048] Here, the unit oil injection volume can be understood as the oil injection volume for a single oil injection. The lubricating oil should be injected multiple times, and the oil volume injected each time is the unit oil injection volume.

[0049] In the present invention, a weighing sensor and a controller for electrically connecting with the weighing sensor are provided on the hanging frame;

[0050] When step S1 is executed and there is cargo suspended below the suspension rack, the controller obtains the mass of the suspended cargo obtained by the weighing sensor.

[0051] It should be noted that there should be a storage table for obtaining the unit fuel injection amount according to the mass of the suspended cargo. Through multiple previous tests, a corresponding table between different suspended weights and the unit fuel injection amount is obtained and stored in the controller. By inputting the suspended weight, the controller can look up the table to obtain the unit fuel injection amount. Moreover, in addition to the influence of the suspended weight on the unit fuel injection amount, there is also the influence of the driving operation duration. For example, when the driving operation of this transportation system reaches a certain duration and the gears are worn, then this driving operation duration corresponds to a correction value to correct the unit fuel injection amount. For example, when the suspended weight is 20 kg and the corresponding unit fuel injection amount in the table is 5 ml, but the driving operation duration of the transportation system reaches 1000 hours and the correction value is 1.1, then the actual obtained unit fuel injection amount is 5 ml * 1.1, that is, 5.5 ml.

[0052] In short, when step S1 is executed, the controller queries the pre-saved unit fuel injection amount comparison table and obtains the unit fuel injection amount through the mass of the suspended cargo and the driving operation duration of the drive.

[0053] S2: Determine whether the remaining amount of lubricating oil in the oil storage chamber is greater than the predetermined oil amount; if so, start the drive to transport the suspension rack and execute step S3; otherwise, issue an alarm.

[0054] As an option in the embodiment of the present application, before the suspension rack is suspended with cargo and before the transportation starts, the remaining amount of the oil storage chamber should be checked. After all, the entire drive is arranged on the suspension rack and moves with the suspension rack. Once it starts to run, it is necessary to ensure that the lubricating oil amount is sufficient. Therefore, it is necessary to ensure that the remaining amount of lubricating oil in the oil storage chamber is greater than the predetermined oil amount before the drive can be started for transportation.

[0055] Moreover, the predetermined oil amount needs to be calculated, calculated according to the suspended weight and the track length, and actually should be calculated according to the suspended weight and the running distance of the cargo.

[0056] Here, before step S2 is executed, the predetermined oil amount value is calculated according to the unit fuel injection amount and the transportation track length.

[0057] S3: Obtain the temperatures of the first transmission gear and the second transmission gear.

[0058] As an option in the embodiments of the present application, the most obvious indicators of whether the lubrication during gear meshing transmission is sufficient are vibration and temperature. When gear scratching is obvious, it will cause scratches on the outer surface of the gear, gear friction vibration, and temperature rise on the outer surface of the gear. Considering that scratches and vibration are greatly affected by other external factors, it is best to judge the lubrication effect based on the temperature rise on the outer surface of the gear. Therefore, it is necessary to obtain the temperatures of the first transmission gear and the second transmission gear.

[0059] Here, a first temperature sensor facing the first transmission gear and a second temperature sensor facing the second transmission gear are provided on the oil injection table; both the first temperature sensor and the second temperature sensor are electrically connected to the controller;

[0060] So that when step S3 is executed, the temperature of the first transmission gear is obtained through the first temperature sensor, the temperature of the second transmission gear is obtained through the second temperature sensor, and the temperature values of the first transmission gear and the second transmission gear are sent to the controller.

[0061] S4: Judge whether the temperature of the first transmission gear is higher than the first predetermined temperature value and the temperature of the second transmission gear is higher than the second predetermined temperature value. If so, the oil injection table injects a unit injection amount of lubricating oil into the first transmission gear, and returns to step S3; otherwise, operation S5 is executed.

[0062] As an option in the embodiments of the present application, when the temperature rise on the gear surface is higher than a certain value, it indicates that the gear lubrication is insufficient and oil injection is required; otherwise, oil injection is not required.

[0063] In the present invention, a pneumatic oil injector electrically connected to the controller is provided in the oil storage cavity;

[0064] So that when step S4 is executed, the controller controls the pneumatic oil injector to push a unit injection amount of lubricating oil through the oil injection table and inject it to the first transmission gear. The pneumatic oil injector has the advantages of high safety and good oil injection stability. The oil in the oil storage cavity is injected to the first transmission gear through the oil injection pipe and the oil injection table for lubrication.

[0065] Since the lubricating oil is directly injected to the first transmission gear, the lubricating oil amount at the first transmission gear is the highest. However, since the lubricating oil on the second transmission gear is transmitted from the first transmission gear, the lubricating oil on the outer surface of the second transmission gear is originally lower than that of the first transmission gear. Therefore, once the lubrication is insufficient, the influence on the second transmission gear is greater than that on the first transmission gear, and the temperature rise of the second transmission gear is greater than that of the first transmission gear.

[0066] Therefore, the second predetermined temperature is not less than the first predetermined temperature.

[0067] As an option of the embodiment of the present application, when step S4 is executed, it specifically includes the following steps:

[0068] S41: Determine whether the temperature of the first transmission gear is higher than the first predetermined temperature value. If so, execute step S42; otherwise, do not perform any operation.

[0069] S42: Generate a second predetermined temperature value according to the temperature of the first transmission gear.

[0070] S43: Determine whether the temperature of the second transmission gear is higher than the second predetermined temperature value. If so, the oil injection platform injects lubricating oil with a unit injection volume into the first transmission gear, and return to step S3; otherwise, do not perform any operation.

[0071] It should be noted that when step S42 is executed, the second predetermined temperature value is k times the temperature of the first transmission gear, and the value of k is not less than 1.05. Then, when the temperature of the second transmission gear is greater than the second predetermined temperature value, the second predetermined temperature value is greater than the temperature of the first transmission gear, and the temperature of the first transmission gear is greater than the first predetermined temperature value, lubrication is required.

[0072] It should be noted that the relationship between the second predetermined temperature value and the temperature of the first transmission gear also depends on the driving speed of the drive motor and the external temperature. For example, the faster the driving speed of the drive motor, it means that the second transmission gear and the first transmission gear rotate faster, and the greater the damage when the second transmission gear is under-lubricated. Then the value of k is smaller (closer to 1.05), and oil injection is required when the temperature of the second transmission gear is greater than the second predetermined temperature value. Another example is that the higher the external temperature, since the temperature rise of the second transmission gear itself is more obvious, in order to prevent excessive oil injection caused by oil injection due to a small temperature rise and dripping onto the suspended goods, the value of k needs to be made larger, and oil injection is required when the temperature of the second transmission gear is greater than the second predetermined temperature value.

[0073] Then, when step S2 is executed, when starting the drive motor for the suspension rack transportation, obtain the driving speed of the drive motor and the external temperature;

[0074] And before executing step S42, calculate the value of k according to the driving speed of the drive motor and the external temperature.

[0075] S5: Determine whether the suspension rack has reached the predetermined position. If so, end the transportation; otherwise, return to step S3.

[0076] As an option of the embodiment of the present application, when the suspension rack reaches the predetermined position, the staff takes the suspended goods. At this time, the drive motor can be shut down to complete this goods transportation; otherwise, continue with the temperature rise monitoring.

[0077] Then, when performing step S1, when there is cargo suspended below the hanging rack, while obtaining the mass of the suspended cargo, obtain the destination position of the hanging rack operation, which is the predetermined position;

[0078] And when performing step S5, determine whether the hanging rack has reached the predetermined position. If so, end the transportation and the drive machine stops working; otherwise, return to step S3.

[0079] An oil injection control method for driving a hanging system according to the present invention is simple and convenient, and can effectively control the oil injection volume according to the hanging load and the hanging operation parameters, effectively avoiding product stains and gear wear, and can be applied to automatic oil injection for long-term running hanging transportation.

[0080] The present invention is not limited to the above specific embodiments, and the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made to the above embodiments based on the technical essence of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil injection control method for hanging system drive, applicable to a hanging drive structure with an oil injection function, including a transport track, a hanging frame arranged on the transport track, and a drive machine for driving the hanging frame to run on the transport track. A first rotating wheel and a second rotating wheel are arranged on the hanging frame on both sides of the transport track respectively. The output shaft of the drive machine is provided with a driving gear. The first rotating wheel is coaxially provided with a first driven gear connected to the driving gear through a first transmission gear. The second rotating wheel is coaxially provided with a second driven gear connected to the first transmission gear through a second transmission gear. An oil injection platform is arranged on the side of the first transmission gear, and the oil injection platform is connected to an oil storage cavity for storing lubricating oil; It is characterized in that, The method includes the following steps: S1: When there is a load hung under the hanging frame, obtain the mass of the hung load to get the unit oil injection volume; S2: Judge whether the remaining amount of lubricating oil in the oil storage cavity is greater than the predetermined oil volume; if so, start the drive machine to transport the hanging frame and execute step S3; otherwise, issue an alarm; S3: Obtain the temperatures of the first transmission gear and the second transmission gear; The oil injection platform is provided with a first temperature sensor facing the first transmission gear and a second temperature sensor facing the second transmission gear; S4: Judge whether the temperature of the first transmission gear is higher than the first predetermined temperature value and the temperature of the second transmission gear is higher than the second predetermined temperature value. If so, the oil injection platform injects lubricating oil with the unit oil injection volume into the first transmission gear and returns to step S3; otherwise, execute step S5; When executing step S4, it specifically includes the following steps: S41: Judge whether the temperature of the first transmission gear is higher than the first predetermined temperature value. If so, execute step S42; otherwise, execute step S5; S42: Generate the second predetermined temperature value according to the temperature of the first transmission gear; S43: Judge whether the temperature of the second transmission gear is higher than the second predetermined temperature value. If so, the oil injection platform injects lubricating oil with the unit oil injection volume into the first transmission gear and returns to step S3; otherwise, execute step S5; When executing step S42, the second predetermined temperature value is k times the temperature of the first transmission gear, and the value of k is not less than 1.05; S5: Judge whether the hanging frame has reached the predetermined position. If so, end the transportation; otherwise, return to step S3.

2. An oil injection control method for hanging system drive according to claim 1, It is characterized in that: A weighing sensor and a controller for electrically connecting with the weighing sensor are arranged on the hanging frame; When executing step S1, when there is a load hung under the hanging frame, the controller obtains the mass of the hung load obtained by the weighing sensor.

3. An oil injection control method for hanging system drive according to claim 2, It is characterized in that: When executing step S1, the controller queries the pre-saved unit oil injection volume comparison table, and obtains the unit oil injection volume through the mass of the hung load and the running duration of the drive machine.

4. An oil injection control method for hanging system drive according to claim 1, It is characterized in that: Before performing step S2, a predetermined oil quantity value is calculated based on the unit oil injection quantity and the length of the transport track.

5. A method for oil injection control for driving a hanging system according to claim 2, wherein: When performing step S3, the temperature of the first transmission gear is obtained through the first temperature sensor, the temperature of the second transmission gear is obtained through the second temperature sensor, and the temperature values of the first transmission gear and the second transmission gear are sent to the controller.

6. A method for oil injection control for driving a hanging system according to claim 2, wherein: The oil storage cavity is provided with a pneumatic oil injector electrically connected to the controller; When performing step S4, the controller controls the pneumatic oil injector to push the lubricating oil of the unit oil injection quantity through the oil injection table and inject it to the first transmission gear.

7. A method for oil injection control for driving a hanging system according to claim 1, wherein: When performing step S2, when starting the drive machine to transport the hanging rack, the driving speed of the drive machine is obtained; Before performing step S42, the value of k is obtained according to the driving speed of the drive machine.

8. A method for oil injection control for driving a hanging system according to claim 1, wherein: When performing step S1, when there is goods hung under the hanging rack, while obtaining the mass of the hung goods, the running target position of the hanging rack is obtained, which is the predetermined position; When performing step S5, it is judged whether the hanging rack reaches the predetermined position. If so, the transportation ends and the drive machine stops working; otherwise, it returns to step S3.

Images