Non-contact flaky material picking device

Abstract

The utility model provides a non-contact flaky material pickup device, which is characterized in that a negative pressure chamber is formed among a cylinder barrel, a piston and a piston rod, a hollow chamber is arranged in the piston rod, a communicating hole for communicating the hollow chamber with the negative pressure chamber is arranged on the piston rod, and an adsorption hole for communicating the hollow chamber is arranged on a pickup head. The positive pressure module is connected to the periphery of the pickup head and internally provided with a positive pressure cavity, and the pickup head is provided with an air blowing hole communicating with the positive pressure cavity. The adsorption holes and the air blowing holes work at the same time, the adsorption holes can generate adsorption force on the flaky materials, the air blowing holes generate negative pressure towards high-speed airflow blown out of gaps between the positive pressure module and the flaky materials, the flaky materials can be adsorbed, the airflow of the air blowing holes can flow to the laminated breathable flaky materials, the vacuum space generated by flaky material separation can be filled, and the separation efficiency of the flaky materials is improved. The adsorption of the adsorption holes to the lower-layer sheet-shaped materials can be reduced, the adsorption holes and the blowing holes are matched to well pick up single breathable sheet-shaped materials, picking up of multiple sheet-shaped materials is avoided, and the efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of sheet material picking devices, and in particular to a non-contact sheet material picking device. Background Technology

[0002] Currently, many industries are gradually adopting automated production equipment, and many of these automated production machines include material picking devices. Some sheet materials contain other sheet materials within them. In automated production processes, picking devices are used to pick up individual sheets from stacked sheet materials and transfer them to the processing station. However, existing sheet material picking devices, when picking up stacked sheet materials, are prone to picking up multiple sheets simultaneously due to electrostatic adsorption between the sheets or the momentary vacuum space between the stacked sheets during separation. This is especially problematic for permeable sheet materials, where multiple sheets are easily picked up, significantly impacting production efficiency.

[0003] Therefore, there is a need to provide a non-contact sheet material picking device to solve the above-mentioned technical problems. Utility Model Content

[0004] This invention provides a non-contact sheet material picking device to solve the problem that existing sheet material picking devices tend to pick up multiple sheets of material when picking up stacked sheets, thus affecting efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a non-contact sheet material picking device, which includes: a cylinder, a piston rod, a piston, a spring, a picking head, and a positive pressure module;

[0006] The piston is slidably disposed inside the cylinder. One end of the piston rod is slidably connected inside the cylinder and fixedly connected to the piston. The spring is sleeved on the outer periphery of the piston rod and compressed between the piston and the inner end face of the cylinder. A negative pressure chamber is formed between the inner wall of the cylinder, the piston, and the piston rod. A negative pressure port communicating with the negative pressure chamber is provided on the outer wall of the cylinder. A hollow chamber is axially disposed inside the piston rod. A communicating hole communicating with the hollow chamber and the negative pressure chamber is provided on the outer wall of the piston rod. The pickup head is connected to the end of the piston rod away from the piston. An adsorption hole communicating with the hollow chamber is provided through the pickup head. The adsorption hole is used to pick up sheet-like materials.

[0007] The positive pressure module is connected to the outer periphery of the pickup head. A positive pressure chamber is provided inside the positive pressure module. A positive pressure interface is provided on the outer wall of the positive pressure module, which extends to the positive pressure chamber. An air blowing hole is provided on the pickup head, which connects the positive pressure chamber and the external space. The air blowing hole blows air toward the gap between the positive pressure module and the sheet material to generate negative pressure, so as to adsorb the sheet material.

[0008] In this invention, a settling groove is provided on the side of the positive pressure module away from the cylinder. The circumferential sidewall of the settling groove is an inclined guide surface. The outer edge of the guide surface is farther from the pickup head than the inner edge. A plurality of air holes are provided on the periphery of the pickup head, and the air holes blow air toward the guide surface.

[0009] The positive pressure module and the pickup head form the positive pressure chamber. The pickup head has an annular portion on its periphery at the end away from the piston rod. The annular portion has a groove on its side near the piston rod that communicates with the positive pressure chamber. The air blowing hole is located on the annular portion and communicates with the groove.

[0010] In addition, the end face of the pickup head is located inside the sink, and the end face of the pickup head is a set distance away from the end face of the positive pressure module.

[0011] In this invention, the pickup head and the piston rod are detachably fixedly connected, the sink groove is provided with a positioning groove that matches the positioning of the ring body, and the positive pressure module is limited between the end faces of the ring body and the piston rod.

[0012] In this invention, the pickup head and the piston rod are integrally formed.

[0013] In this utility model, the cylinder includes a main body, a rear end cap, a retaining ring, and a buffer pad;

[0014] The main cylinder has an installation opening at the end away from the pickup head. An installation groove is provided on the side wall of the installation opening. A retaining groove is provided on the inner wall of the installation groove. The rear end cover is disposed in the installation groove. A first sealing ring is provided between the rear end cover and the inner wall of the installation groove. A buffer pad is disposed on the side of the rear end cover near the piston. A retaining ring is connected in the retaining groove and fixes the rear end cover in the installation groove.

[0015] In addition, the cylinder also includes a front end cover, which is a cylindrical structure. The front end cover is connected to the end of the main cylinder away from the rear end cover. A second sealing ring is provided between the front end cover and the main cylinder. The negative pressure port is provided on the outer wall of the front end cover. The piston rod is slidably sleeved inside the front end cover.

[0016] In this invention, an annular fixing groove is provided on the periphery of the piston, and a third sealing ring for contacting the inner wall surface of the cylinder is provided in the fixing groove. A fourth sealing ring is provided between the positive pressure module and the pickup head.

[0017] In this invention, the negative pressure interface and the positive pressure interface face the same side.

[0018] In this invention, the pickup head and the positive pressure module are made of conductive metal.

[0019] Compared to existing technologies, the advantages of this invention are as follows: The non-contact sheet material picking device of this invention features an adsorption hole and an air blowing hole on the picking head. When both holes operate simultaneously, the adsorption hole generates an adsorption force on the sheet material, while the high-speed airflow from the air blowing hole into the gap between the positive pressure module and the sheet material creates negative pressure, adsorbing the sheet material. Furthermore, the airflow from the air blowing hole flows towards the stacked, breathable sheet material, quickly filling the instantaneous vacuum space created by the separation of the sheet material, reducing the adsorption of lower layers of sheet material by the adsorption hole. The combined use of the adsorption hole and air blowing hole effectively picks up single breathable sheet materials, avoiding the picking up of multiple sheet materials, resulting in high efficiency. When only the adsorption hole is working, it can also be used to pick up impermeable sheet materials, exhibiting high adsorption compatibility and diverse functions.

[0020] On the other hand, the airflow from the blowing hole is directed at a different location than the adsorption hole adsorbs the material. This means that the blowing of air from the blowing hole onto the material does not significantly affect the adsorption of the material by the adsorption hole. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0022] Figure 1 This is a schematic diagram of a preferred embodiment of the non-contact sheet material picking device of this utility model.

[0023] Figure 2 This is an exploded structural diagram of the non-contact sheet material picking device of this utility model.

[0024] Figure 3 This is a cross-sectional view of the non-contact sheet material picking device of this utility model.

[0025] Figure 4 for Figure 3 Partial cross-sectional view of the pickup head and positive pressure module.

[0026] Figure 5 This is a cross-sectional view of the pickup head and piston rod in this utility model when they are integrally formed. Detailed Implementation

[0027] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0029] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, a connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In existing sheet material picking devices, when picking up stacked sheet materials, the electrostatic adsorption between the sheet materials or the instantaneous vacuum space between the two layers during the separation time of the stacked sheet materials can easily cause the target sheet material to be picked up along with the lower sheet material, resulting in the problem of multiple sheet materials being picked up at the same time. This is especially true for breathable sheet materials, which are more likely to pick up multiple sheet materials, greatly affecting production efficiency.

[0032] The following is a preferred embodiment of a non-contact sheet material picking device provided by this utility model that can solve the above technical problems.

[0033] Please refer to Figures 1 to 3 In the diagram, units with similar structures are represented by the same labels.

[0034] This embodiment provides a non-contact sheet material picking device, which includes: cylinder 11, piston rod 14, piston 15, spring 16, picking head 12, and positive pressure module 13.

[0035] The piston 15 is slidably disposed within the cylinder 11. One end of the piston rod 14 is slidably connected within the cylinder 11 and fixedly connected to the piston 15. The piston 15 and piston rod 14 may be connected by threads. A spring 16 is sleeved on the outer circumference of the piston rod 14, and the spring 16 is compressed between the inner end faces of the piston 15 and the cylinder 11. The spring 16 can be used to drive the piston 15 to slide away from the pickup head 12, so that the piston rod 14 retracts further into the cylinder 11.

[0036] A negative pressure chamber X is formed between the inner wall of the cylinder 11, the piston 15, and the piston rod 14. A negative pressure interface 111 is provided on the outer wall of the cylinder 11 to communicate with the negative pressure chamber X. The negative pressure interface 111 is connected to an external negative pressure device. A threaded hole for connecting to the negative pressure device can be provided in the negative pressure interface 111.

[0037] A hollow chamber Y is axially disposed inside the piston rod 14. A connecting hole 141 is provided on the outer wall of the piston rod 14, connecting the hollow chamber Y and the negative pressure chamber X. The pickup head 12 is connected to the end of the piston rod 14 away from the piston 15. An adsorption hole 121 is provided through the pickup head 12, connecting the hollow chamber Y. When the external negative pressure device works and generates negative pressure in the negative pressure chamber X, due to the pressure difference between the negative pressure chamber X and the hollow chamber Y, the piston 15 will overcome the elastic force of the spring 16 and push the piston 15 and the piston rod 14 to move outward in the cylinder 11. At the same time, the presence of the connecting hole 141 will generate negative pressure in the hollow chamber Y, thereby enabling the adsorption hole 121 to pick up the sheet material.

[0038] Please refer to Figure 4 A positive pressure module 13 is connected to the outer periphery of the pickup head 12. A positive pressure chamber Z is provided inside the positive pressure module 13. A positive pressure interface 131, penetrating the positive pressure chamber Z, is provided on the outer wall of the positive pressure module 13. The positive pressure interface 131 connects to an external positive pressure device, and a threaded hole for connecting to the positive pressure device can be provided inside the positive pressure interface 131. An air blowing hole 122 is provided on the pickup head 12, connecting the positive pressure chamber Z and the external space. The air blowing hole 122 blows air towards the gap between the positive pressure module 13 and the sheet material. A high-speed airflow exists in the gap between the positive pressure module 13 and the sheet material. According to Bernoulli's principle, the high-speed airflow creates a negative pressure in the gap between the positive pressure module 13 and the sheet material. This negative pressure generates an adsorption force that pulls the sheet material closer to the positive pressure module 13, forming a non-contact pickup. At the same time, part of the airflow blown out by the air hole 122 will flow to the sheet material. If the sheet material is breathable, the airflow will pass through the breathable sheet material and fill the spaces between the stacked sheet materials, which can avoid picking up multiple sheet materials at a time.

[0039] On the other hand, the airflow from the blowing hole 122 is directed to a different location on the sheet material than the adsorption hole 121 adsorbs the sheet material. This means that the airflow from the blowing hole 122 to the sheet material does not significantly affect the adsorption of the sheet material by the adsorption hole 121.

[0040] In this embodiment, a settling groove 132 is provided on the side of the positive pressure module 13 away from the cylinder 11. The circumferential sidewall of the settling groove 132 is an inclined guide surface 133. The outer edge of the guide surface 133 is farther from the pickup head 12 than the inner edge. Multiple air blowing holes 122 are provided on the periphery of the pickup head 12. The air blowing holes 122 blow air toward the guide surface 133. The airflow will flow along the guide surface 133 and the end face of the positive pressure module 13 away from the cylinder 11. The blown airflow will be more dispersed and uniform, and has a good adsorption effect on sheet materials.

[0041] Specifically, in this embodiment, a positive pressure chamber Z is formed between the positive pressure module 13 and the pickup head 12. A ring body portion 123 is provided on the periphery of the end of the pickup head 12 away from the piston rod 14. A groove communicating with the positive pressure chamber Z is provided on the side of the ring body portion 123 near the piston rod 14. Air blowing holes 122 are provided on the ring body portion 123. Multiple air blowing holes 122 are all communicating with the groove, so that the positive pressure gas in the positive pressure chamber Z is blown towards the sheet material through the air blowing holes 122.

[0042] Furthermore, the end face of the pickup head 12 is located within the settling tank 132, and the end face of the pickup head 12 is a set distance away from the end face of the positive pressure module 13. This ensures that when the center of the sheet material is adsorbed by the adsorption hole 121, the periphery of the sheet material will droop downwards. A small gap remains between the end face of the positive pressure module 13 away from the cylinder 11 and the sheet material, allowing for a high-speed airflow from the air blowing hole 122, which effectively adsorbs the sheet material. If the end face of the pickup head 12 protrudes beyond the settling tank 132, the gap between the end face of the positive pressure module 13 and the sheet material will be too large, resulting in poor adsorption.

[0043] At the same time, the entire settling tank 132 generates negative pressure, which has a large adsorption area and strong suction force, and can stably hold the sheet material, making it less likely to fall off. This high stability also improves work efficiency.

[0044] Please refer to Figure 4Optionally, the pickup head 12 and the piston rod 14 can be detachably fixedly connected, and a threaded connection can be used between them. A positioning groove is provided in the recess 132 to align with the ring body 123. The positive pressure module 13 is positioned between the end faces of the ring body 123 and the piston rod 14, allowing for easy connection between the positive pressure module 13 and the pickup head 12 and the piston rod 14. The pickup head 12 and the positive pressure module 13 require a precise fit, and the pickup head 12 requires numerous structural designs. Separating the pickup head 12 and the piston rod 14 allows for cost-effective replacement of the pickup head 12 if it is damaged.

[0045] Please refer to Figure 5 Optionally, the pickup head 12 and the piston rod 14 can be integrally formed, which reduces the connection and assembly of the pickup head 12 and the piston rod 14, reduces the number of disassembly and assembly steps, and enhances the overall integrity.

[0046] Please refer to Figure 2 and Figure 3 In this embodiment, the cylinder 11 includes a main cylinder 112, a rear end cover 113, a retaining ring 114, and a buffer pad 115.

[0047] The main cylinder 112 has an installation opening at the end away from the pickup head 12. The installation opening can be used to install components such as piston 15, piston rod 14 and spring 16 inside the main cylinder 112.

[0048] A mounting groove 1121 is provided on the side wall of the mounting opening, and a retaining groove is provided on the inner wall of the mounting groove 1121. The rear end cover 113 is disposed within the mounting groove 1121, and a first sealing ring 1131 for improving sealing is provided between the rear end cover 113 and the inner wall of the mounting groove 1121. A buffer pad 115 is disposed on the side of the rear end cover 113 near the piston 15. When the piston 15 returns to its original position, the piston 15 can contact the buffer pad 115, which can buffer the impact force between the piston 15 and the buffer pad 115, resulting in quieter operation. A retaining ring 114 is connected in the retaining groove, and the retaining ring 114 can fix and restrict the rear end cover 113 within the mounting groove 1121.

[0049] In addition, the cylinder 11 also includes a front end cover 116, which is a cylindrical structure. The front end cover 116 is connected to the end of the main cylinder 112 away from the rear end cover 113. The front end cover 116 and the main cylinder 112 can be fixed by a threaded connection. A second sealing ring 1161 is provided between the front end cover 116 and the main cylinder 112 to improve the sealing performance. The negative pressure port 111 is provided on the outer wall of the front end cover 116, and the piston rod 14 is slidably sleeved inside the front end cover 116. The inner diameter of the position where the front end cover 116 and the piston rod 14 slide and engage is smaller than the inner diameter of the main cylinder 112. The front end cover 116 and the main cylinder 112 are designed separately. The main cylinder 112 only needs to be cut and processed using a hollow long tube with the same inner diameter, resulting in lower overall cost.

[0050] In this embodiment, an annular fixing groove is provided on the periphery of the piston 15, and a third sealing ring 151 is provided in the fixing groove for contacting the inner wall surface of the cylinder 11 to improve the sealing performance. A fourth sealing ring is provided between the positive pressure module 13 and the pickup head 12 to improve the sealing performance.

[0051] In this embodiment, the negative pressure interface 111 and the positive pressure interface 131 face the same side, which facilitates connection with external negative pressure and positive pressure devices.

[0052] In this embodiment, the pickup head 12 and the positive pressure module 13 are made of conductive metal. The pickup head 12 is very close to the sheet material, which can reduce the static electricity between the sheet material and reduce the adsorption force between the sheet material due to static electricity, thus better avoiding picking up multiple sheet materials at a time.

[0053] It should be noted that, without considering the reduction of static electricity between sheet materials, even if the pickup head 12 and the positive pressure module 13 are made of non-conductive materials such as plastic, the sheet materials can still be effectively picked up by the combination of the adsorption hole 121 and the air blowing hole 122.

[0054] On the other hand, there is a high-speed airflow between the pickup head 12, the positive pressure module 13 and the sheet material. The airflow contains moisture, so the high-speed airflow can also eliminate and reduce the static electricity of the sheet material.

[0055] The working principle of this utility model is as follows: When picking up breathable sheet material, negative pressure gas is introduced into the negative pressure port 111. Due to the pressure difference between the negative pressure chamber X and the hollow chamber Y, under the action of the pressure difference, the piston 15 will overcome the elastic force of the spring 16 and push the piston 15 and piston rod 14 to move towards the outside of the cylinder 11. The piston rod 14 extends out of the cylinder 11 and approaches the stacked sheet material. At the same time, the presence of the connecting hole 141 will generate negative pressure in the hollow chamber Y, thereby enabling the adsorption hole 121 to pick up the sheet material.

[0056] On the other hand, positive pressure gas is introduced into the positive pressure interface 131, and multiple air blowing holes 122 blow air towards the guide surface 133. High-speed airflow is blown out in the gap between the positive pressure module 13 and the sheet material, generating negative pressure. The negative pressure exerts an adsorption force on the sheet material, causing it to move closer to the positive pressure module 13. At the same time, some of the airflow blown out by the air blowing holes 122 passes through the breathable sheet material and fills the spaces between the stacked sheet materials, preventing the picking up of multiple sheet materials at once. Furthermore, the air blowing position of the air blowing holes 122 on the sheet material is different from the adsorption position of the adsorption holes 121 on the sheet material. This means that the air blowing from the air blowing holes 122 on the sheet material is less likely to have a significant impact on the adsorption of the sheet material by the adsorption holes 121, reducing the adsorption on the lower sheet material. In this way, the pickup head can stably pick up a single breathable sheet material, avoiding the picking up of multiple sheet materials.

[0057] When the pickup head 12 picks up the breathable sheet material, both the adsorption hole 121 and the air blowing hole 122 generate negative pressure that has an adsorption force on the sheet material. At the same time, the sheet material seals the settling tank 132, and the entire settling tank 132 generates negative pressure, which has a large adsorption area and a large suction force, and can stably pick up the sheet material with very high stability and efficiency. Meanwhile, the sheet material will block the adsorption hole 121, so that the hollow chamber Y is no longer connected to the atmosphere. The air pressure in the hollow chamber Y gradually becomes consistent with that in the negative pressure chamber X. Under the elastic force of the spring 16, the piston rod 14 retracts, thereby picking up the single sheet material.

[0058] After the picked-up sheet material is removed, the hollow chamber Y is connected to the atmosphere again, and a pressure difference is formed between the negative pressure chamber X and the hollow chamber Y. The pickup head 12 will then extend out of the cylinder 11 to pick up the sheet material again. In this way, the pickup head 12 can move back and forth to pick up sheet material.

[0059] When it is necessary to pick up airtight sheet materials, negative pressure gas is introduced into the negative pressure port 111, while positive pressure gas is not required into the positive pressure port 131. Due to the pressure difference between the negative pressure chamber X and the hollow chamber Y, under the action of the pressure difference, the piston 15 will overcome the elastic force of the spring 16 and push the piston 15 and piston rod 14 to move outward from the cylinder 11. The piston rod 14 extends out of the cylinder 11 and approaches the stacked sheet materials. At the same time, the presence of the connecting hole 141 will generate negative pressure in the hollow chamber Y, thereby enabling the adsorption hole 121 to pick up the sheet materials. Meanwhile, the pickup head 12 and the positive pressure module 13 are made of conductive metal. The close proximity of the pickup head 12 to the sheet materials can reduce the static electricity between the sheet materials and reduce the adsorption force generated by static electricity between the sheet materials, thus better avoiding the picking up of multiple sheet materials at one time.

[0060] Similarly, when the airtight sheet material blocks the adsorption pore 121, the hollow chamber Y is no longer connected to the atmosphere. The air pressure in the hollow chamber Y gradually becomes consistent with that in the negative pressure chamber X. Under the elastic force of the spring 16, the piston rod 14 retracts, thereby picking up the single sheet material. After the picked-up sheet material is removed, the hollow chamber Y is connected to the atmosphere again, and a pressure difference is formed between the negative pressure chamber X and the hollow chamber Y. The pickup head 12 will then extend out of the cylinder 11 again to pick up the sheet material.

[0061] It should also be noted that when picking up airtight sheet materials, positive pressure gas can also be introduced through the positive pressure port 131. However, the positive pressure gas should not be too strong, as excessive positive pressure gas will cause some of the airflow flowing towards the sheet material to have a counter-effect on the picking up of the sheet material. Since multiple sheet materials are generally stacked in the material box, the airflow blown out by the positive pressure port 131 can also fill the spaces between the stacked sheet materials after rebounding from the inner wall of the material box, thus avoiding picking up multiple sheet materials at once.

[0062] This completes the process of the non-contact sheet material picking device of this preferred embodiment picking up sheet materials.

[0063] The non-contact sheet material picking device of this preferred embodiment can pick up both air-permeable and airtight sheet materials, and is more stable than traditional picking components. It can effectively avoid picking up multiple sheet materials at once, making control simpler, and is highly efficient, thus greatly saving costs.

[0064] Specifically, by incorporating adsorption holes and air blowing holes on the pickup head, when both work simultaneously, the adsorption holes exert an adsorption force on the sheet material, while the high-speed airflow from the air blowing holes into the gap between the positive pressure module and the sheet material creates negative pressure, further adsorbing the sheet material. Furthermore, the airflow from the air blowing holes flows towards the stacked, breathable sheet material, quickly filling the instantaneous vacuum space created by the separation of the sheet material and reducing the adsorption of lower layers of sheet material by the adsorption holes. The combined effect of the adsorption holes and air blowing holes effectively picks up single breathable sheet materials, avoiding the picking up of multiple sheet materials, resulting in high efficiency. When only the adsorption holes are working, it can also be used to pick up impermeable sheet materials, offering high adsorption compatibility and versatility.

[0065] On the other hand, the airflow from the blowing hole is directed at a different location than the adsorption hole adsorbs the material. This means that the blowing of air from the blowing hole onto the material does not significantly affect the adsorption of the material by the adsorption hole.

[0066] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A non-contact sheet material picking device, characterized in that, include: Cylinder, piston rod, piston, spring, pickup head, and positive pressure module; The piston is slidably disposed inside the cylinder. One end of the piston rod is slidably connected inside the cylinder and fixedly connected to the piston. The spring is sleeved on the outer periphery of the piston rod and compressed between the piston and the inner end face of the cylinder. A negative pressure chamber is formed between the inner wall of the cylinder, the piston, and the piston rod. A negative pressure port communicating with the negative pressure chamber is provided on the outer wall of the cylinder. A hollow chamber is axially disposed inside the piston rod. A communicating hole communicating with the hollow chamber and the negative pressure chamber is provided on the outer wall of the piston rod. The pickup head is connected to the end of the piston rod away from the piston. An adsorption hole communicating with the hollow chamber is provided through the pickup head. The adsorption hole is used to pick up sheet-like materials. The positive pressure module is connected to the outer periphery of the pickup head. A positive pressure chamber is provided inside the positive pressure module. A positive pressure interface is provided on the outer wall of the positive pressure module, which extends to the positive pressure chamber. An air blowing hole is provided on the pickup head, which connects the positive pressure chamber and the external space. The air blowing hole blows air toward the gap between the positive pressure module and the sheet material to generate negative pressure, so as to adsorb the sheet material.

2. The non-contact sheet material picking device according to claim 1, characterized in that, The positive pressure module has a settling groove on the side away from the cylinder. The circumferential sidewall of the settling groove is an inclined guide surface. The outer edge of the guide surface is farther from the pickup head than the inner edge. A plurality of air holes are arranged on the periphery of the pickup head, and the air holes blow air toward the guide surface.

3. The non-contact sheet material picking device according to claim 2, characterized in that, The positive pressure chamber is formed between the positive pressure module and the pickup head. A ring portion is provided on the periphery of the end of the pickup head away from the piston rod. A groove communicating with the positive pressure chamber is provided on the side of the ring portion near the piston rod. An air blowing hole is provided on the ring portion and communicates with the groove.

4. The non-contact sheet material picking device according to claim 2, characterized in that, The end face of the pickup head is located inside the sink, and the end face of the pickup head is a set distance away from the end face of the positive pressure module.

5. The non-contact sheet material picking device according to claim 3, characterized in that, The pickup head and the piston rod are detachably fixedly connected. The sink is provided with a positioning groove that matches the positioning of the ring body. The positive pressure module is limited between the end faces of the ring body and the piston rod.

6. The non-contact sheet material picking device according to claim 1, characterized in that, The pickup head and the piston rod are integrally formed.

7. The non-contact sheet material picking device according to claim 1, characterized in that, The cylinder includes a main body, a rear end cap, a retaining ring, and a buffer pad; The main cylinder has an installation opening at the end away from the pickup head. An installation groove is provided on the side wall of the installation opening. A retaining groove is provided on the inner wall of the installation groove. The rear end cover is disposed in the installation groove. A first sealing ring is provided between the rear end cover and the inner wall of the installation groove. A buffer pad is disposed on the side of the rear end cover near the piston. A retaining ring is connected in the retaining groove and fixes the rear end cover in the installation groove.

8. The non-contact sheet material picking device according to claim 7, characterized in that, The cylinder also includes a front end cover, which is a cylindrical structure. The front end cover is connected to the end of the main cylinder away from the rear end cover. A second sealing ring is provided between the front end cover and the main cylinder. The negative pressure port is located on the outer wall of the front end cover. The piston rod is slidably sleeved inside the front end cover.

9. The non-contact sheet material picking device according to claim 1, characterized in that, The negative pressure port and the positive pressure port face the same side.

10. The non-contact sheet material picking device according to claim 1, characterized in that, The pickup head and the positive pressure module are made of conductive metal.

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