Screw centralized distribution machine for HVAC production line

Abstract

The utility model belongs to the technical field of HVAC air conditioner assembly screw assembly, and relates to a screw centralized distribution machine used for an HVAC production line, which comprises a screw bin, a step conveying mechanism, a first conveying track, a screw counting machine, a temporary storage bin and a second conveying track, and an outlet of the screw bin is connected with an inlet of the first conveying track through the step conveying mechanism. An outlet of the first conveying track is connected with an inlet of the screw counting machine, an outlet of the screw counting machine is connected with an inlet of the temporary storage bin, an outlet of the temporary storage bin is connected with an inlet of the second conveying track, and an outlet of the second conveying track is connected with a tool receiving disc on the HVAC production line. The screw distribution device solves the problems that the screw machine fails to stop due to excessive feeding and the screw distribution quantity is inaccurate, the screw conveying waiting time is shortened, and the screw distribution speed is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw assembly of HVAC air-conditioning assemblies, and relates to a screw centralized distribution machine for HVAC production lines. Background Art

[0002] In modern manufacturing, during the assembly process of HVAC (Heating, Ventilation and Air Conditioning) systems, the operation of tightening screws is an essential part. However, there are significant problems with traditional screw distribution methods in terms of efficiency and accuracy, which are particularly prominent in large-scale production line environments.

[0003] A common method is to set up containers at the workstations to store screws. Although this method is simple and easy to implement, it has multiple drawbacks. First, when operators pick up screws, it is often difficult to precisely control the quantity, and it is easy to take too many screws at one time. This not only increases the risk of screws falling into the workpiece during assembly, and such drops are often difficult to detect, affecting product quality. Second, when the count of the counting system is less than the set quantity, operators may misjudge that the screws are not tightened in place, resulting in missed fastening, which in turn affects the stability and durability of the product. In addition, due to the volume of the material box and the limitation of the working space, screws are likely to fall to the ground or mix into the tooling and transmission equipment during the picking process. This not only may cause damage to the equipment, but also leads to waste of materials. Finally, the short material distribution cycle of this method makes it difficult to accurately count the quantity of screws used, which is not conducive to cost control and standardized management. Another method is to use a screw counting machine for distribution. Although this method can more precisely control the quantity of screws, there are also many problems. The screw counting machine occupies valuable working space, affecting the cleanliness and efficiency of the working environment. At the same time, since the number of ejected screws cannot be effectively associated with the tooling or a single product, the possibility of operators' illegal operations increases, posing challenges to quality control. In addition, when operators take more screws, the remaining screws are often not effectively recyclable, resulting in waste of resources. It is also difficult to control the feeding amount of the screw counting machine. Too much may cause the machine to jam, and too little will result in too long screw ejection time or even inaccurate screw quantity, affecting the production progress and product quality.

[0004] In summary, the existing screw distribution methods have many deficiencies in HVAC production line assembly. There is an urgent need for a new type of screw distribution mechanism to solve the above problems, improve the screw distribution speed, and avoid screw missed fastening accidents caused by screw distribution. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a screw centralized distribution machine for HVAC production lines to solve the problems raised in the background art.

[0006] To achieve the above object, the present utility model provides the following technical solutions:

[0007] A screw centralized distribution machine for an HVAC production line, comprising a screw bin, a stepped conveying mechanism, a first conveying track, a screw counting machine, a buffer bin, and a second conveying track. The outlet of the screw bin is connected to the inlet of the first conveying track through the stepped conveying mechanism. The outlet of the first conveying track is connected to the inlet of the screw counting machine. The outlet of the screw counting machine is connected to the inlet of the buffer bin. The outlet of the buffer bin is connected to the inlet of the second conveying track. The outlet of the second conveying track is connected to a tooling receiving tray on the HVAC production line.

[0008] Further, a bin position detection switch is provided in the screw counting machine to detect the material level in the screw counting machine, and then control the operation of the stepped conveying mechanism through the material level in the screw counting machine to control the timing of the screw bin conveying screws to the first conveying track.

[0009] Further, a screw detection inductor is also provided between the screw counting machine and the buffer bin for rechecking and counting the screws.

[0010] Further, bin doors are provided at both the outlet and the inlet of the buffer bin to temporarily store the screws after counting.

[0011] Further, a track up and down air cylinder is also provided on the second conveying track to lift the second conveying track to avoid collision between the second conveying track and the tooling on the HVAC production line.

[0012] Further, it also includes a PLC control system for controlling the screw centralized distribution machine. The stepped conveying mechanism, the screw counting machine, the bin position detection switch, the screw detection inductor, the bin doors of the buffer bin, and the track up and down air cylinder are all electrically connected to the above PLC control system to realize the automatic control of the screw centralized distribution machine.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The screw centralized distribution machine for an HVAC production line provided by the present utility model solves the problems of equipment failure shutdown caused by excessive feeding of the screw machine and inaccurate screw distribution quantity, reduces the screw conveying waiting time, improves the screw distribution speed, and since the screw distribution quantity accurately corresponds to the number of screws required by the tooling, it can force employees to retrieve the screws missed during the assembly process and avoid the risk of screw omission.

[0015] Other advantages, objectives, and features of the present utility model will, to some extent, be elaborated in the subsequent description. And to some extent, they will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the following description. Brief Description of the Drawings

[0016] In order to make the objectives, technical solutions, and advantages of the present utility model clearer, the present utility model will be described in detail preferably with reference to the accompanying drawings, where:

[0017] Figure 1 Is an axonometric view of a screw centralized distribution machine for an HVAC production line in the embodiment;

[0018] Figure 2 Is a sectional view of a screw centralized distribution machine for an HVAC production line in the embodiment;

[0019] Figure 3 Is a schematic diagram of the usage process of a screw centralized distribution machine for an HVAC production line in the embodiment.

[0020] Reference numerals: 1 - screw bin, 2 - stepped conveyor mechanism, 3 - first conveyor track, 4 - screw counting machine, 5 - bin detection switch, 6 - screw detection inductor, 7 - buffer bin, 8 - track up and down cylinder, 9 - second conveyor track. Detailed Embodiment

[0021] The following illustrates the embodiments of the present utility model through specific examples. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0022] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present utility model; in order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged, or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0023] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be understood as a limitation of the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] Please refer to Figures 1 to 2 , a screw centralized distribution machine for an HVAC production line, which includes a screw bin 1, a stepped conveying mechanism 2, a first conveying track 3, a screw counting machine 4, a bin position detection switch 5, a screw detection sensor 6, a buffer bin 7, an upper and lower track cylinder 8, and a second conveying track 9. The outlet of the screw bin 1 is connected to the inlet of the first conveying track 3 through the stepped conveying mechanism 2. The outlet of the first conveying track 3 is connected to the inlet of the screw counting machine 4. The outlet of the screw counting machine 4 is connected to the inlet of the buffer bin 7. The outlet of the buffer bin 7 is connected to the inlet of the second conveying track 9. The outlet of the second conveying track 9 is connected to the tooling receiving tray on the HVAC production line.

[0025] Preferably, a bin position detection switch 5 is provided in the screw counting machine 4 to detect the material level in the screw counting machine 4, and then control the action of the stepped conveying mechanism 2 to control the timing of the screw bin conveying screws to the first conveying track;

[0026] A screw detection sensor 6 is also provided between the screw counting machine 4 and the buffer bin 7 for accurate screw counting, controlling the start and stop of the screw counting machine, and rechecking the screws sent out by the screw counting machine 4.

[0027] The screw bin 1 is used to store prepared screws. The stepped conveying mechanism 2 is used to convey the prepared screws to the first conveying track 3. The first conveying track 3 is used to convey the prepared screws to the screw counting machine. The screw counting machine 4 is used for screw arrangement and rough screw quantity counting. The buffer bin 7 is used to cache the screws after counting, and has a bin door at its inlet and outlet to temporarily store the counted screws. The second conveying track 9 is used to transport the screws in the buffer bin to the tooling receiving tray.

[0028] Furthermore, an upper and lower track cylinder 8 is also provided on the second conveying track 9 to lift the second conveying track 9 to avoid collision between the second conveying track 9 and other toolings on the HVAC production line.

[0029] Specifically, it further includes a carrying platform for carrying the screw bin 1, the stepped conveying mechanism 2, the first conveying track 3, the screw counting machine 4, the buffer bin 7, the track up-and-down cylinder 8, and the second conveying track 9.

[0030] The specific structure of the stepped conveying mechanism 2 includes a stepped structure that gradually rises towards the first conveying track 3, a cylinder for driving the lifting of the stepped structure, and a housing for accommodating the stepped structure; the first conveying track 3 is an inclined downward slide towards the screw counting machine 4, and the second conveying track 9 has a conveyor belt towards the tooling receiving tray.

[0031] In another embodiment, a conveyor belt may also be provided in the first conveying track 3, and the second conveying track 9 may also be set as an inclined slide, as long as the purpose of conveying screws can be satisfied.

[0032] This screw centralized distribution machine further includes a PLC control system for controlling this screw centralized distribution machine. The stepped conveying mechanism 2, the screw counting machine 4, the bin position detection switch 5, the screw detection inductor 6, the door of the buffer bin, the track up-and-down cylinder 8, and the second conveying track 9 are all electrically connected to the above PLC control system to realize the automatic control of this screw centralized distribution machine.

[0033] Please refer to Figure 3 , for the usage process of a screw centralized distribution machine for HVAC production lines. Its principle is to use the counting function of the screw counting machine and the electrical signal interaction between the screw detection inductor (photoelectric switch) and the PLC control system to achieve precise control of the screw quantity; use the interaction between the bin position detection switch and the PLC control system to control the up-and-down movement of the stepped conveying mechanism to realize material transmission; use the production line computer to set the required quantity and the PLC control system to pre-store screws in advance in the standby state; use the production line tooling in-place signal to drive the track up-and-down cylinder 8 to lower the second conveying track 9 and open the outlet door of the buffer bin 7 to start distributing screws.

[0034] The specific steps are as follows:

[0035] First, 30,000 screws are added to the screw silo 1 at one time, and then the position detection switch of the screw counting machine is used to control the step conveying mechanism. The screws in the screw silo are conveyed to the first conveying track and the screw counting machine through the step conveying mechanism. The screw counting machine starts counting according to the number of screws configured by the HVAC production line model, and the number of screws is verified by the screw detection sensor. The screw detection sensor sends a feedback signal to drive the cache to open the door at the entrance and close the door at the exit to store screws. After the tooling receiving tray is in place, the upper and lower cylinders of the track move to lower the second conveying track, and the door at the exit of the cache is opened to release the screws. After the screws are out, the mechanism is reset after a delay of 3-5S, and the tooling receiving tray is released. Repeat the above steps to realize the feeding of screws to multiple tooling receiving trays.

[0036] After using the centralized screw delivery machine in a certain HVAC production line, the delivery of screw materials was reduced from 12 times / day to 1 time / day, and the screw tightening counting system reduced the number of screw leaks from 4 times / month to 0 times / year. The waiting time for screw delivery was reduced from 5-10S to 0S, and the number of screws could be accurately understood through the screw counting machine. The number of screws falling into the workpiece was reduced from 12 times / year to 2 times / year.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A screw centralized distribution machine for HVAC production lines, characterized in that: It includes a screw bin, a stepped conveying mechanism, a first conveying track, a screw counting machine, a buffer bin and a second conveying track. The outlet of the screw bin is connected to the inlet of the first conveying track through the stepped conveying mechanism. The outlet of the first conveying track is connected to the inlet of the screw counting machine. The outlet of the screw counting machine is connected to the inlet of the buffer bin. The outlet of the buffer bin is connected to the inlet of the second conveying track. The outlet of the second conveying track is connected to the tooling receiving tray on the HVAC production line.

2. The screw centralized distribution machine for the HVAC production line according to claim 1, characterized in that: A position detection switch is provided in the screw counting machine to detect the material level in the screw counting machine, and then control the operation of the stepped conveying mechanism through the material level in the screw counting machine to control the timing of the screw bin conveying screws to the first conveying track.

3. The screw centralized distribution machine for the HVAC production line according to claim 2, characterized in that: A screw detection inductor is also provided between the screw counting machine and the buffer bin for rechecking and counting the screws.

4. The screw centralized distribution machine for the HVAC production line according to claim 3, characterized in that: Warehouse doors are provided at both the outlet and inlet of the buffer bin to temporarily store the screws after counting.

5. The screw centralized distribution machine for HVAC production line according to claim 4, characterized in that: An upper and lower track cylinder is also provided on the second conveying track to lift the second conveying track to avoid collision between the second conveying track and the tooling on the HVAC production line.

6. The centralized screw dispenser for HVAC production line according to claim 5, wherein: It also includes a PLC control system for controlling this screw centralized distribution machine. The stepped conveying mechanism, the screw counting machine, the position detection switch, the screw detection inductor, the warehouse door of the buffer bin and the upper and lower track cylinder are all electrically connected to the above PLC control system to realize the automatic control of this screw centralized distribution machine.

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