An automatic jewelry feeding device

Abstract

This utility model relates to an automatic jewelry suction device, including a main body, a mounting frame, and a flexible gripping mechanism. Opening a three-way switching valve and starting a blower allows for the separate control of two air pipes, which can be closed individually to extract air from a single air pipe, enabling switching between dual-station and single-station operation. The blower extracts air from the air pipe, allowing external air to enter through a filter at the bottom of the sleeve, creating negative pressure at the bottom of the filter. The main body allows for adjustment of the mounting frame position, thus adjusting the position of the suction nozzle. The mounting frame also features a lifting mechanism to adjust the height of the connecting seat, thereby adjusting the height of the air pipe and the suction nozzle. Both the sleeve and the filter are made of deformable rubber. The filter deforms upon contact with the jewelry, slightly enveloping it. Airflow through the mesh of the filter creates negative pressure at the bottom, adsorbing and gripping the jewelry.

Description

Technical Field

[0001] This utility model relates to the technical field of jewelry production equipment, specifically to an automatic jewelry feeding device. Background Technology

[0002] In the production process of the jewelry industry, there are many technical challenges in product gripping. The industry has frequent product updates and replacements, different products have different shapes, and the product size range that needs to be compatible is very large, which puts forward high requirements for the universality of gripping methods.

[0003] The industry commonly uses turnover trays with foam grids to place products. However, there are significant difficulties in picking up products from the grids. On the one hand, products may stick to the inner wall of the grids, increasing the difficulty of picking them up. On the other hand, the size of some products is close to the size of the grids, making it difficult for traditional grippers to reach in and pick them up smoothly. Furthermore, the products are easily scratched during operation, affecting product quality. Therefore, we need to provide an automatic jewelry picking device. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic jewelry suction device, which has a flexible gripping mechanism on the surface of the mounting frame. It can adsorb and grip the jewelry by generating negative pressure, and the suction nozzle can be deformed to adapt to different types of jewelry. It can also protect the jewelry and prevent scratches, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic jewelry feeding device, comprising:

[0006] The main body, the mounting frame, and the flexible gripping mechanism are provided. The mounting frame is fixedly mounted on the surface of the main body, and the mounting frame is provided with two flexible gripping mechanisms. The flexible gripping mechanisms are used to adsorb jewelry of different sizes through airflow to protect the surface of the jewelry.

[0007] The flexible gripping mechanism includes a suction nozzle, an air tube, a connecting seat, and a negative pressure component. The mounting frame has two connecting seats on its surface, and an air tube is fixedly installed inside the connecting seat. The surface of the air tube is slidably installed inside the mounting frame. The top of the two air tubes is provided with a negative pressure component, and the bottom of the air tube is connected to the suction nozzle.

[0008] Preferably, the negative pressure component is used to extract air from the air tube, thereby creating negative pressure in the suction nozzle. The negative pressure component includes a blower and two three-way switching valves, which control the two air tubes to work together.

[0009] Preferably, the suction nozzle includes a sleeve and a filter screen, the top annular edge of the sleeve is fixed to the bottom annular edge of the air tube, and the filter screen is fixedly installed at the bottom of the air tube.

[0010] Preferably, the sleeve is configured as a retractable rubber tube, and the filter screen is configured as a rubber disc with mesh.

[0011] Preferably, it also includes a lifting mechanism, which is mounted on the surface of the mounting frame and is used to move the air tube to achieve nozzle height adjustment.

[0012] Preferably, two brackets are fixedly mounted on the surface of the mounting bracket, a slide rail is fixedly mounted on the surface of the bracket, and a slider that is slidably connected to the slide rail is fixedly mounted on the surface of the connecting seat.

[0013] Preferably, the mounting frame has multiple hollowed-out grooves on its surface, and the mounting frame is made of aluminum alloy.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention features a flexible gripping mechanism on the mounting frame surface, which can adsorb and grip jewelry by generating negative pressure. The suction nozzle is deformable to adapt to different types of jewelry and protects the jewelry from scratches. The negative pressure adsorption combined with the deformable suction nozzle can adapt to jewelry of different sizes and shapes, solving the problem of traditional grippers being difficult to use due to the variety of product specifications. It eliminates the need for frequent replacement of gripping parts, improving the versatility of the equipment. The deformable nature of the suction nozzle allows for flexible contact with the jewelry, and combined with the non-rigid gripping method of negative pressure adsorption, it avoids the scratches and abrasions caused by the hard contact between traditional grippers and jewelry. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the flexible gripping mechanism of this utility model;

[0018] Figure 3 This is a partial structural schematic diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the negative pressure component of this utility model;

[0020] Figure 5 This is a schematic diagram of the filter screen of this utility model;

[0021] Figure 6 This is a cross-sectional view of the sleeve of this utility model.

[0022] In the diagram: 1. Main body; 2. Mounting bracket; 3. Flexible gripping mechanism; 31. Suction nozzle; 311. Sleeve; 312. Filter screen; 32. Air pipe; 33. Connecting seat; 34. Negative pressure component; 341. Blower; 342. Three-way switching valve; 4. Lifting mechanism; 5. Bracket; 6. Slide rail; 7. Slider; 8. Hollowed-out groove. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-6 This utility model provides a technical solution: an automatic jewelry feeding device, comprising:

[0025] The main body 1, the mounting frame 2, and the flexible gripping mechanism 3 are provided. The mounting frame 2 is fixedly mounted on the surface of the main body 1. The mounting frame 2 is provided with two flexible gripping mechanisms 3. The flexible gripping mechanism 3 is used to adsorb jewelry of different sizes through airflow to protect the surface of the jewelry.

[0026] The flexible gripping mechanism 3 includes a suction nozzle 31, an air tube 32, a connecting seat 33, and a negative pressure component 34. The surface of the mounting frame 2 is provided with two connecting seats 33. An air tube 32 is fixedly installed inside the connecting seat 33. The surface of the air tube 32 is slidably installed inside the mounting frame 2. The top of the two air tubes 32 is provided with a negative pressure component 34, and the bottom of the air tube 32 is connected to the suction nozzle 31.

[0027] Specifically, a flexible gripping mechanism 3 is provided on the surface of the mounting frame 2, which can adsorb and grip jewelry by generating negative pressure. The suction nozzle 31 is deformable to adapt to different types of jewelry and can also protect the jewelry from scratches. The negative pressure adsorption combined with the deformable suction nozzle 31 can adapt to jewelry of different sizes and shapes, solving the problem of traditional grippers being difficult to use due to the variety of product specifications. It eliminates the need for frequent replacement of gripping parts, improving the equipment's versatility. The deformable nature of the suction nozzle 31 allows it to make flexible contact with the jewelry. Combined with the non-rigid gripping method of negative pressure adsorption, it avoids the scratches and abrasions caused by the hard contact between traditional grippers and jewelry, effectively protecting the surface quality of the jewelry. Even if the jewelry is placed against the wall in the turnover tray, negative pressure adsorption can still grip it stably, overcoming the problem of gripping difficulties caused by inaccurate positioning of traditional grippers. With the relevant structural design, the gripping stability and efficiency are improved, adapting to the needs of the jewelry industry for rapid product updates and special turnover and storage scenarios.

[0028] The negative pressure component 34 is used to extract air from the air pipe 32, so that negative pressure is generated in the suction nozzle 31. The negative pressure component 34 includes a blower 341 and two three-way switching valves 342. The two three-way switching valves 342 control the two air pipes 32 to work together.

[0029] Furthermore, the blower 341 of the negative pressure component 34 is connected to the air inlet of two three-way switching valves 342 through the main pipe. The three-way switching valves 342 are respectively connected to the top of the two air pipes 32 through branch pipes. The three-way switching valves 342 are electromagnetic reversing valves, which are electrically connected to an external PLC controller. They can control the valve core switching through pulse signals to realize the negative pressure on / off of one or both air pipes 32. The electromagnetic three-way valve (such as model K25D-8L) has a response time of ≤0.1s. It is used in conjunction with a Φ16mm PU material main pipe and a Φ10mm branch pipe to ensure airflow sealing. The independent control of the dual valves realizes the switching between dual-station and single-station operation, which solves the problem of low efficiency of traditional single-station equipment. It is suitable for batch and single-piece jewelry grasping scenarios and improves the flexibility of operation.

[0030] The suction nozzle 31 includes a sleeve 311 and a filter screen 312. The top annular edge of the sleeve 311 is fixed to the bottom annular edge of the air tube 32, and the filter screen 312 is fixedly installed at the bottom of the air tube 32.

[0031] It is worth noting that the inner wall of the sleeve 311 of the suction nozzle 31 is sealed to the outer wall of the bottom of the air tube 32, and the bottom edge of the sleeve 311 is fixed to the annular edge of the filter screen 312 with food-grade silicone adhesive; the mesh diameter of the filter screen 312 is 0.5-2mm, and the silicone adhesive ensures the sealing between the filter screen 312 and the sleeve 311; the mesh diameter of the filter screen 312 can also gradually increase from the center to the edge. The gradient mesh design makes the negative pressure evenly distributed at the bottom of the suction nozzle 31, which solves the problem of unstable adsorption of small-sized jewelry, and at the same time avoids deformation of large-sized jewelry due to excessive local negative pressure.

[0032] The sleeve 311 is configured as a retractable rubber tube, and the filter screen 312 is configured as a rubber disc with mesh.

[0033] It should be noted that the sleeve 311 is made of medical-grade silicone with a Shore hardness of 30-40 and a wall thickness of 1.5-2mm, and can stretch and contract by ±10mm along the axis; the filter screen 312 has a rubber layer thickness of 3-5mm. The low-hardness silicone ensures that the sleeve 311 can deform with the shape of the jewelry, solving the problem that the traditional suction nozzle 31 cannot grasp products attached to the wall due to rigid contact; the medical-grade silicone is wear-resistant and anti-aging, increasing the service life to more than 5,000 times and reducing maintenance costs.

[0034] It also includes a lifting mechanism 4, which is mounted on the surface of the mounting frame 2 and is used to move the air tube 32 to achieve height adjustment of the nozzle 31;

[0035] Two brackets 5 are fixedly installed on the surface of the mounting bracket 2. A slide rail 6 is fixedly installed on the surface of the bracket 5. A slider 7 that is slidably connected to the slide rail 6 is fixedly installed on the surface of the connecting seat 33.

[0036] The slide rail 6 has a dovetail structure, and the slider 7 has a corresponding dovetail groove. A polytetrafluoroethylene wear-resistant sheet with a thickness of 0.2mm is embedded between the slider 7 and the slide rail 6. The bracket 5 and the mounting bracket 2 are detachably connected by M5 hexagon socket bolts. The bracket 5 is made of 6061 aluminum alloy with an anodized surface. The dovetail structure and wear-resistant sheet ensure that the sliding resistance of the connecting seat 33 is ≤5N, while preventing the slider 7 from falling off. The lightweight design of the aluminum alloy bracket 5, combined with the hollow mounting bracket 2, reduces the inertia of the equipment and solves the vibration problem during high-speed movement. The detachable connection makes it easy to replace the bracket 5 and adapt to the variation requirements of slide rails 6 of different lengths.

[0037] The surface of the mounting bracket 2 is provided with multiple hollowed-out grooves 8, and the mounting bracket 2 is made of aluminum alloy.

[0038] The slots 8 of the mounting bracket 2 are waist-shaped holes, evenly distributed along the length of the mounting bracket 2. The aluminum alloy frame of the mounting bracket 2 is made of 5052 aluminum alloy, die-cast in one piece, with a thickness of 8-10mm. The surface is coated with a polyurea anti-corrosion layer. The waist-shaped slots 8 reduce weight while facilitating the wiring of the air pipe 32 and the heat dissipation of the equipment. The bending strength of 5052 aluminum alloy is ≥290MPa. Combined with the polyurea coating, it solves the corrosion problem in the humid workshop environment and improves the service life of the equipment.

[0039] The base and intermediate seat of the main body 1 are equipped with slewing bearings, and the intermediate seat and top seat are equipped with slewing bearings. The inner ring of the bearing is fixed to the lower part and the outer ring is fixed to the upper part. The driver is a combination of a servo motor and a harmonic reducer. The output end of the reducer is rigidly connected to the upper part, and the positioning accuracy is ≤0.05°.

[0040] Detailed description: The main body adopts a slewing bearing of model HSR17 (load capacity ≥500kg), combined with a 200W servo motor and a 1:100 harmonic reducer, to achieve 1360° rotation and ±180° pitch adjustment of the main body; high-precision positioning solves the problem of misalignment of the suction nozzle 31 caused by angular deviation in traditional equipment;

[0041] Furthermore, a material presence / absence detection sensor is provided on the surface of the connector 33. This sensor is a diffuse reflection infrared photoelectric sensor (such as model E3Z-D61), with its detection head tilted downwards at 45° and mounted on the side of the connector 33 facing the suction nozzle 31. The vertical distance from the bottom of the filter screen 312 of the suction nozzle 31 is 30-50mm, ensuring that the sensor spot can cover the adsorption area of ​​the suction nozzle 31. The sensor is fixed in the pre-set mounting hole of the connector 33 with M3 screws, and a ±5° angle adjustment space is reserved to adapt to the detection needs of jewelry of different sizes.

[0042] The sensor is linked with the negative pressure component 34 and the lifting mechanism 4. It determines whether jewelry is being attracted by detecting whether there is an obstruction at the bottom of the suction nozzle 31: when the suction nozzle 31 attracts jewelry, the jewelry blocks the infrared light, and the sensor outputs a low-level signal; when not attracted, the infrared light is unobstructed, and a high-level signal is output. The signal is transmitted to the external PLC controller in real time. If a high level is detected for 3 consecutive seconds (no attraction), the controller will trigger the lifting mechanism 4 to retry, or pause the equipment and sound an alarm to avoid production interruption caused by empty grabbing.

[0043] The sensor has an adjustable detection distance (10-100mm) and a response time of ≤1ms. It can identify jewelry with a minimum diameter of 2mm (such as earrings), solving the problems of lag and misjudgment in traditional manual visual inspection or contact inspection. Its non-contact detection method will not cause pressure or scratches on the surface of the jewelry, and works synergistically with the protective function of the flexible suction nozzle 31 to further improve the safety of the grasping process.

[0044] The sensor is encased in a silicone protective sleeve (Shore hardness 50) to prevent damage from collisions with other components during the lifting and lowering of the suction nozzle 31. The wiring terminals connect to the main circuit of the equipment via a waterproof aviation plug, achieving an IP65 protection rating to withstand the dust and slight moisture environment that may exist in jewelry workshops, ensuring long-term stable operation.

[0045] The main body 1, blower 341, three-way switching valve 342, material presence / absence detection sensor and lifting mechanism 4 involved in this application are all implemented using existing mature technologies and connected to an external PLC controller and power supply. This is a conventional technical means in this field, so its specific circuit connection, control logic and working process will not be described in detail.

[0046] This device opens the three-way switching valve 342 and starts the blower 341. The two three-way switching valves 342 control two air pipes 32 respectively and can be closed independently, allowing air to be drawn out of a single air pipe 32, enabling switching between dual-station and single-station operation. The blower 341 draws air out of the air pipe 32, allowing external air to enter through the filter screen 312 at the bottom of the sleeve 311, creating negative pressure at the bottom of the filter screen 312. The position of the mounting bracket 2 can be adjusted via the main body 1, thus adjusting the position of the suction nozzle 31. The mounting bracket 2 is equipped with a lifting mechanism 4, which can adjust the height of the connecting seat 33, thereby adjusting the height of the air pipe 32 and the suction nozzle 31. When the connecting seat 33 moves... The slider 7 on the surface of the slide rail 6 will slide, adjusting the height of the connecting seat 33 and providing guidance. Both the sleeve 311 and the filter screen 312 are made of deformable rubber material. The filter screen 312 can deform when in contact with the jewelry, slightly wrapping the jewelry. The airflow through the mesh of the filter screen 312 creates negative pressure at the bottom of the filter screen 312, adsorbing and gripping the jewelry. The main body 1 includes a base at the bottom, a middle seat in the middle, and a top seat at the top. The base has a driver that can drive the middle seat to rotate. The middle seat also has a driver to realize the rotation adjustment of the top seat. The top seat has multiple external ports for connecting to external devices.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A jewelry automatic suction device, characterized in that, include: The main body (1), the mounting frame (2) and the flexible gripping mechanism (3) are provided. The mounting frame (2) is fixedly installed on the surface of the main body (1). The mounting frame (2) is provided with two flexible gripping mechanisms (3) on the surface of the mounting frame (2). The flexible gripping mechanism (3) is used to adsorb jewelry of different sizes through airflow to protect the surface of the jewelry. The flexible gripping mechanism (3) includes a suction nozzle (31), an air tube (32), a connecting seat (33), and a negative pressure component (34). The mounting frame (2) has two connecting seats (33) on its surface. An air tube (32) is fixedly installed inside the connecting seat (33). The surface of the air tube (32) is slidably installed inside the mounting frame (2). A negative pressure component (34) is provided at the top of the two air tubes (32). The bottom of the air tube (32) is connected to the suction nozzle (31).

2. The automatic jewelry material suction device according to claim 1, characterized in that: The negative pressure component (34) is used to extract air from the air pipe (32) to generate negative pressure in the nozzle (31). The negative pressure component (34) includes a blower (341) and two three-way switching valves (342). The two three-way switching valves (342) control the two air pipes (32) to work together.

3. The automatic jewelry material suction device according to claim 1, characterized in that: The suction nozzle (31) includes a sleeve (311) and a filter screen (312). The top annular edge of the sleeve (311) is fixed to the bottom annular edge of the air tube (32), and the filter screen (312) is fixedly installed at the bottom of the air tube (32).

4. The automatic jewelry material suction device according to claim 3, characterized in that: The sleeve (311) is configured as a retractable rubber tube, and the filter screen (312) is configured as a rubber disc with mesh.

5. The automatic jewelry material suction device according to claim 1, characterized in that: It also includes a lifting mechanism (4), which is mounted on the surface of the mounting bracket (2) and is used to move the air tube (32) to achieve height adjustment of the suction nozzle (31).

6. The automatic jewelry material suction device according to claim 1, characterized in that: The mounting bracket (2) has two brackets (5) fixedly mounted on its surface. The brackets (5) have slide rails (6) fixedly mounted on their surfaces. The connecting seat (33) has a slider (7) fixedly mounted on its surface that is slidably connected to the slide rails (6).

7. The automatic jewelry material suction device according to claim 6, characterized in that: The mounting bracket (2) has multiple hollowed-out grooves (8) on its surface, and the mounting bracket (2) is made of aluminum alloy.

Images