Vacuum suction transport device

Abstract

The present application relates to a kind of vacuum adsorption handling device, device includes handling gantry and vacuum adsorption mechanism, vacuum adsorption mechanism includes hanger mounted on handling gantry, suction cup assembly is arrayed on hanger;Suction cup assembly includes mounting plate, and fixedly connected with hanger;Main suction cup is formed by negative pressure pipe and suction cup head;Hollow outer ring is set on the outer periphery of main suction cup, annular chamber is formed in hollow outer ring, and hollow outer ring side wall is equipped with suction port;Positioning structure is installed on mounting plate, for applying axial limit to hollow outer ring.The present application is first pasted with board by the hollow outer ring that can be axially limited before adsorption, annular chamber is formed to carry out negative pressure dust removal, then by main suction cup adsorption clean area, effectively prevent pollution to cause the drop of board caused by main suction cup air leakage.

Description

Technical Field

[0001] This invention relates to the field of vacuum adsorption and handling technology, and specifically to a vacuum adsorption and handling device. Background Technology

[0002] In the production process, sheet materials are frequently involved, and there are many types of sheet materials, such as aluminum sheets, plastic sheets, and other metal sheets. Vacuum suction handling devices are widely used in sheet material processing and automated loading and unloading due to their advantages such as no scratches, fast response, and adaptability to flat sheets. However, existing vacuum suction cup mechanisms mostly adopt a fixed layout, resulting in uneven distribution of suction force. When handling large or thin sheets, insufficient airtightness can easily lead to vacuum failure, causing the sheet material to slip or even fall.

[0003] A currently published Chinese patent authorization announcement number, CN116872245B, describes a vacuum suction cup robot for handling aluminum plates, which prevents them from falling. The robot includes a support column, a rotating rod, an electrically telescopic rod, a first support rod, second support rods, and vacuum suction cups. The rotating rod is rotatably connected to the top of the support column, and the top of the electrically telescopic rod is slidably connected inside the rotating rod. The first support rod is fixedly connected to the movable end of the electrically telescopic rod. Four second support rods are connected to the bottom of the first support rod, and vacuum suction cups are installed at both ends of each of the four second support rods. Abutment rods for contacting the aluminum plates are symmetrically inserted on the first support rods. A cleaning plate for cleaning dust from the aluminum plates is installed below the second support rods. Auxiliary clamping plates for holding fallen aluminum plates are hinged to both ends of each of the four second support rods.

[0004] According to the aforementioned patent, the cleaning plate scrapes away dust from the surface of the aluminum plate beneath the vacuum suction cup during its movement to both sides, effectively solving the problem of dust preventing a complete seal between the vacuum suction cup and the aluminum plate. However, this scraping method can only remove loosely attached surface particles, resulting in limited cleaning effectiveness. Furthermore, during the brief interval between the completion of scraping and the establishment of vacuum adsorption, suspended dust in the environment may re-adhere to the cleaned surface, causing the adsorption seal to fail again.

[0005] Therefore, there is a need for a handling device to address the insufficient reliability of vacuum adsorption in existing technologies and ensure the stability of vacuum adsorption handling of sheet materials. Summary of the Invention

[0006] This invention provides a vacuum adsorption and handling device. Before adsorption, a hollow outer ring that can be axially limited is first attached to the plate to form an annular chamber for negative pressure dust removal. Then, the main suction cup adsorbs the clean area, effectively preventing the plate from falling due to air leakage caused by contamination.

[0007] This invention provides a vacuum adsorption transport device, comprising: a transport gantry and a vacuum adsorption mechanism. The vacuum adsorption mechanism includes a hanger mounted on the transport gantry and a suction cup assembly arrayed on the hanger. The suction cup assembly includes a mounting plate fixedly connected to the hanger, a main suction cup consisting of a negative pressure tube and a suction cup head. One end of the negative pressure tube is fixedly connected to the mounting plate, and the other end extends vertically downward. The suction cup head is fixedly disposed on the lower extension end of the negative pressure tube. A primary negative pressure chamber is formed inside the main suction cup. A hollow outer ring is fitted around the outer periphery of the main suction cup. The inner diameter of the hollow outer ring is larger than the outer diameter of the main suction cup. An annular chamber is formed inside the hollow outer ring. An air extraction port is provided on the side wall of the hollow outer ring, which connects the annular chamber to an external pipeline. A positioning structure is mounted on the mounting plate to apply axial limiting to the hollow outer ring. When the hollow outer ring is in pre-contact with the surface of the material, the hollow outer ring and the surface of the material form a local negative pressure suction area.

[0008] Optionally, the suction cup assembly further includes a secondary suction cup, which is sleeved on the outer periphery of the negative pressure tube. The inner diameter of the secondary suction cup is larger than the outer diameter of the main suction cup. The main suction cup and the secondary suction cup enclose a secondary negative pressure cavity. The secondary suction cup is provided with a negative pressure interface communicating with the secondary negative pressure cavity.

[0009] Optionally, a sleeve is fixedly fitted on the negative pressure tube and above the suction head, and an annular seal is provided on the inner wall of the upper end of the auxiliary suction cup, the annular seal being slidably sealed with the outer wall of the sleeve.

[0010] Optionally, a pressure-holding spring is fitted on the sleeve, one end of which is fixedly connected to the sleeve and the other end is fixedly connected to an annular seal. The adsorption surface of the auxiliary suction cup is lower than the adsorption surface of the main suction cup when the pressure-holding spring is in its natural state.

[0011] Optionally, the inner diameter of the hollow outer ring is larger than the outer diameter of the auxiliary suction cup, and the inner wall of the hollow outer ring is provided with an inwardly extending annular guide sleeve. The outer peripheral surface of the auxiliary suction cup slides in conjunction with the annular guide sleeve to form a radial limit.

[0012] Optionally, a lower sealing ring is provided on the outer periphery of the auxiliary suction cup, and an upper sealing ring is provided on the bottom surface of the annular guide sleeve. The upper sealing ring and the lower sealing ring form an end face sealing fit under axial compression.

[0013] Optionally, the lower end face of the hollow outer ring is provided with an annular sealing gasket for bonding with the surface of the plate to form a sealing interface.

[0014] Optionally, a fixed seat is fixedly provided on the mounting plate, a pressing member is provided below the fixed seat, a compression spring is provided between the pressing member and the fixed seat, the two ends of the compression spring are fixedly connected to the upper ends of the fixed seat and the pressing member respectively, and the lower end of the pressing member abuts against the upper end face of the annular guide sleeve.

[0015] Optionally, the pressing component includes a pressing ring and a plurality of pressing feet that extend uniformly along its circumference. A contact ring coaxial with the annular guide sleeve is fixedly connected between the plurality of pressing feet. The pressing ring is slidably sleeved on the outer periphery of the negative pressure tube, and the contact ring abuts against the upper end face of the annular guide sleeve.

[0016] Optionally, the positioning structure includes multiple positioning pins, which are evenly distributed around the circumference of the fixed seat. The positioning pins are capable of moving radially along the fixed seat. The side wall of the fixed seat is provided with a pin hole for the positioning pin to slide therein. The side wall of the pressure ring is provided with a limiting hole that cooperates with the positioning pin.

[0017] In this invention, a pre-treatment mechanism of dust removal is achieved by using a hollow outer ring with axial limiting capability in conjunction with the main suction cup. The hollow outer ring, locked by the positioning structure, first adheres to the material, forming a localized negative pressure suction area to remove surface contaminants and complete pre-sealing. After dust removal, the locking is released, the hollow outer ring remains in place, and the main suction cup continues to move downwards to adsorb the clean area. This improves the reliability of material adsorption, effectively preventing the risk of falling due to contamination or air leakage, and achieving efficient and stable anti-fall handling. A secondary suction cup is set around the outer periphery of the main suction cup, forming an independent secondary negative pressure chamber with the outer wall of the main suction cup. The secondary suction cup is connected by a pressure-holding spring, ensuring that its adsorption surface is always lower than the adsorption surface of the main suction cup in its natural state. When the suction cup assembly descends to contact the material, the secondary suction cup adheres to the surface before the main suction cup and adaptively attaches under the continuous thrust of the pressure-holding spring, maintaining an effective adsorption state and further improving the stability of vacuum adsorption handling. Through the synergistic action of the pressing component, compression spring, and positioning structure, precise pre-contact and dynamic pressure holding of the hollow outer ring are achieved. In the initial state, the positioning pin inserts into the limiting hole to lock the lower pressure component, ensuring that the lower end face of the hollow outer ring is lower than the main and auxiliary suction cups, thus making initial contact with the material and forming an annular cavity. After cleaning, the positioning pin retracts to unlock, and the main and auxiliary suction cups continue to move downwards to adsorb the clean area. Simultaneously, the compression spring is compressed and continuously pushes the hollow outer ring downwards, ensuring that the annular sealing gasket remains in contact with the material, preventing external dust intrusion and improving the anti-drop performance during material handling. This handling device is suitable for aluminum plates, plastic plates, alloy plates, or other metal plates. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the conveying device in an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the vacuum adsorption mechanism of the conveying device in an embodiment of the present invention; Figure 3 This is a partial three-dimensional structural diagram of the vacuum adsorption mechanism of the conveying device in an embodiment of the present invention; Figure 4 This is a three-dimensional structural cross-sectional view of the hollow outer ring of the conveying device in the embodiment of the present invention in the locked state; Figure 5 This is a planar sectional view of the hollow outer ring of the conveying device in the embodiment of the present invention in the locked state; Figure 6 This is a three-dimensional structural cross-sectional view of the hollow outer ring of the conveying device in the embodiment of the present invention in the unlocked state; Figure 7 This is a planar sectional view of the hollow outer ring of the conveying device in the embodiment of the present invention in the unlocked state; Figure 8 This is a three-dimensional structural diagram of the suction cup assembly of the conveying device in an embodiment of the present invention from a first perspective; Figure 9 This is a three-dimensional structural diagram of the suction cup assembly of the conveying device in an embodiment of the present invention from a second perspective; Figure 10 This is an exploded three-dimensional structural diagram of the suction cup assembly of the conveying device in an embodiment of the present invention; 1. Sheet metal; 2. Handling gantry frame; 3. Vacuum adsorption mechanism; 31. Hanger; 4. Suction cup assembly; 41. Mounting plate; 42. Main suction cup; 421. Negative pressure pipe; 422. Suction cup head; 423. Primary negative pressure chamber; 43. Hollow outer ring; 431. Annular chamber; 432. Air extraction port; 44. Positioning structure; 441. Positioning pin; 442. Return spring; 443. Fixed electromagnet; 444. Movable electromagnet; 45. Auxiliary suction cup; 451. Secondary negative pressure chamber; 452. Negative pressure interface; 5. Pipe sleeve; 51. Annular seal; 52. Pressure holding spring; 53. Annular guide sleeve; 531. Lower sealing ring; 532. Upper sealing ring; 533. Annular sealing gasket; 6. Fixed base; 61. Lower pressure part; 611. Lower pressure ring sleeve; 6111. Limiting hole; 612. Pressing foot; 613. Abutting ring sleeve; 62. Compression spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The terms "first," "second," etc., used in the specification and claims of this invention are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] like Figures 1 to 9 As shown, the vacuum adsorption transport device of this embodiment includes: a transport gantry 2 and a vacuum adsorption mechanism 3. The vacuum adsorption mechanism 3 includes a hanger 31 mounted on the transport gantry 2 and a suction cup assembly 4 arrayed on the hanger 31. The suction cup assembly 4 includes a mounting plate 41, which is fixedly connected to the hanger 31. The main suction cup 42 is composed of a negative pressure tube 421 and a suction cup head 422. One end of the negative pressure tube 421 is fixedly connected to the mounting plate 41, and the other end extends vertically downward. The suction cup head 422 is fixedly mounted on the lower extension end of the negative pressure tube 421. A primary negative pressure chamber 423 is formed inside the main suction cup 42. A hollow outer ring 43 is sleeved on the outer periphery of the main suction cup 42. The inner diameter of the hollow outer ring 43 is larger than the outer diameter of the main suction cup 42. An annular chamber 431 is formed inside the hollow outer ring 43. An air extraction port 432 is provided on the side wall of the hollow outer ring 43, and the air extraction port 432 connects the annular chamber 431 to an external pipeline. The positioning structure 44, mounted on the mounting plate 41, is used to apply axial restraint to the hollow outer ring 43. With the hollow outer ring 43 in pre-contact with the surface of the plate 1, a localized negative pressure suction area is formed between the hollow outer ring 43 and the surface of the plate 1. The plate may include aluminum plate, plastic plate, alloy plate, or other metal plate.

[0022] When the transport gantry 2 drives the entire vacuum adsorption mechanism 3 downwards and approaches the plate 1 to be transported, the lower end face of the hollow outer ring 43 is kept below the adsorption surface of the suction head 422 of the main suction cup 42 due to the limiting effect of the positioning structure 44. Therefore, as the vacuum adsorption mechanism 3 continues to descend, the hollow outer ring 43 first contacts the surface of the plate 1, while the main suction cup 42 has not yet touched the plate 1. At the moment the lower end face of the hollow outer ring 43 contacts the plate 1, its end forms a tight fit with the surface of the plate 1, thus forming a ring-shaped local area together with the plate 1. At this time, the external vacuum system immediately evacuates the internal annular chamber 431 through the evacuation port 432 on the side wall of the hollow outer ring 43, quickly establishing a negative pressure environment in this area and forming a local negative pressure suction area. Under this negative pressure, the floating dust, small particles and residual gas on the surface of the area to be adsorbed on the plate 1 are efficiently extracted, achieving in-situ cleaning and pre-sealing, and improving the reliability of subsequent main adsorption.

[0023] Throughout the dust removal process, the position of the hollow outer ring 43 is actively locked by the positioning structure 44, remaining stationary to ensure the stability of the sealed area. Once the preset dust removal time has ended or the negative pressure reaches the threshold, the control system triggers the positioning structure 44, releasing the axial limit on the hollow outer ring 43. At this point, the hollow outer ring 43 is no longer forcibly fixed, but because it is already attached to the plate 1 and has no additional driving force, it remains stationary in its current position. Subsequently, the vacuum adsorption mechanism 3 continues to descend slightly, but at this time only the main suction cup 42 moves downward relative to the hollow outer ring 43. Since the hollow outer ring 43 is already anchored on the surface of the plate 1, the main suction cup 42 continues to press down under the guidance of its negative pressure tube 421 until its suction cup head 422 precisely adheres to the center of the clean area that has just been cleaned. At this point, the primary negative pressure chamber 423 is activated, establishing the main adsorption force and firmly gripping the plate 1.

[0024] Throughout the process, the hollow outer ring 43 completes the closed loop of functions of initial contact, sealing and dust removal, and dwelling and giving way, while the main suction cup 42 achieves high-reliability adsorption on the ideal surface, creating the best adsorption conditions for the main suction cup 42, fundamentally avoiding adsorption failure caused by surface contamination, and effectively preventing the plate 1 from falling off.

[0025] In some embodiments, such as Figures 4 to 10As shown, the suction cup assembly 4 also includes a secondary suction cup 45, which is sleeved around the outer periphery of the negative pressure tube 421. The inner diameter of the secondary suction cup 45 is larger than the outer diameter of the main suction cup 42. The main suction cup 42 and the secondary suction cup 45 enclose a secondary negative pressure chamber 451. The secondary suction cup 45 is provided with a negative pressure interface 452 that communicates with the secondary negative pressure chamber 451. During the operation of the suction cup assembly 4, the main suction cup 42 adheres to the surface of the plate 1 through its suction head 422, and the internal primary negative pressure chamber 423 forms the main suction force under the action of external vacuum. At the same time, the secondary suction cup 45, sleeved around the outer periphery of the negative pressure tube 421, naturally encloses an annular gap space with the outer wall of the main suction cup 42 because its inner diameter is larger than the outer diameter of the main suction cup 42. This space constitutes the secondary negative pressure chamber 451. The auxiliary suction cup 45 has its own independent negative pressure interface 452, which is connected to an external vacuum system. It can share or have a separate pipeline with the main suction cup 42. While the main suction cup 42 is adsorbing, a negative pressure environment is simultaneously established in the secondary negative pressure chamber 451. Thus, the main suction cup 42 bears the main handling load, and the auxiliary suction cup 45 provides dual protection, further improving the reliability of preventing the material from falling when handling the sheet 1.

[0026] In other embodiments, such as Figures 4 to 10 As shown, a sleeve 5 is fixedly fitted on the negative pressure tube 421 and above the suction head 422. An annular seal 51 is provided on the inner wall of the upper end of the auxiliary suction cup 45, and the annular seal 51 slides and seals with the outer wall of the sleeve 5. The annular seal 51 at the upper end of the auxiliary suction cup 45 is always tightly fitted to the outer wall surface of the sleeve 5. During this process, the annular seal 51 and the outer wall of the sleeve 5 always maintain a dynamic airtight fit, which allows the auxiliary suction cup 45 to move flexibly in the vertical direction, while effectively preventing external air from entering the secondary negative pressure chamber 451 through the gap between the inner wall of the auxiliary suction cup 45 and the negative pressure tube 421. This ensures that the secondary negative pressure chamber 451 formed by the main suction cup 42 and the auxiliary suction cup 45 maintains a stable sealing and negative pressure environment.

[0027] In some embodiments, such as Figures 4 to 7 As shown, a pressure-holding spring 52 is fitted onto the sleeve 5. One end of the pressure-holding spring 52 is fixedly connected to the sleeve 5, and the other end is fixedly connected to the annular seal 51. In its natural state, the adsorption surface of the auxiliary suction cup 45 is lower than the adsorption surface of the main suction cup 42. When the entire suction cup assembly 4 descends and approaches the surface of the plate 1, the auxiliary suction cup 45, due to its lower position, contacts the plate 1 before the main suction cup 42. During contact, the auxiliary suction cup 45 can adaptively adhere to the surface under the action of the pressure-holding spring 52, maintaining contact pressure on the plate 1. This not only achieves the initial low-position setting of the adsorption surface of the auxiliary suction cup 45, but also ensures that the auxiliary suction cup 45 always has effective adhesion capability during dynamic handling through the constant pressure of the pressure-holding spring 52, providing a reliable mechanical and sealing foundation for the stable operation and anti-drop performance of the secondary negative pressure chamber 451.

[0028] Optionally, such as Figures 4 to 7 As shown, the inner diameter of the hollow outer ring 43 is larger than the outer diameter of the auxiliary suction cup 45. The inner wall of the hollow outer ring 43 is provided with an inwardly extending annular guide sleeve 53. The outer circumferential surface of the auxiliary suction cup 45 slides in conjunction with the annular guide sleeve 53, forming a radial limit. During the downward movement of the suction cup assembly 4 towards the surface of the plate 1, the hollow outer ring 43 is in an extended state due to being limited by the positioning structure 44, and it is entirely fitted around the outer circumference of the auxiliary suction cup 45. Because the inner diameter of the hollow outer ring 43 is larger than the outer diameter of the auxiliary suction cup 45, there is an annular gap between them, which does not interfere with the internal suction action. Furthermore, because the inner wall of the hollow outer ring 43 is provided with an inwardly extending annular guide sleeve 53, the inner hole of the annular guide sleeve 53 slides in conjunction with the outer circumferential surface of the auxiliary suction cup 45. When the hollow outer ring 43 is disturbed by external force and tends to shift radially, the auxiliary suction cup 45 effectively restricts the lateral swaying or tilting of the hollow outer ring 43, so that the hollow outer ring 43 always remains coaxial with the main suction cup 42 and the auxiliary suction cup 45 during axial movement, ensuring that its lower end face can be evenly and stably attached to the surface of the plate 1, avoiding local sealing failure or uneven dust removal due to skew.

[0029] In some embodiments, such as Figures 4 to 7 As shown, a lower sealing ring 531 is fitted around the outer periphery of the auxiliary suction cup 45, and an upper sealing ring 532 is correspondingly provided on the bottom surface of the annular guide sleeve 53. The upper sealing ring 532 and the lower sealing ring 531 form an end-face sealing fit under axial compression. When the positioning structure 44 locks the hollow outer ring 43 in the preset extended position, the hollow outer ring 43 and the annular guide sleeve 53 on its inner wall are fixed in place. At this time, the auxiliary suction cup 45 is in a natural drooping state under the action of the pressure-holding spring 52. The lower sealing ring 531 fitted around its outer periphery and the upper sealing ring 532 provided on the bottom surface of the annular guide sleeve 53 fit together in the axial direction, so that a static end-face sealing fit is formed between the upper sealing ring 532 and the lower sealing ring 531, effectively sealing the annular gap between the annular guide sleeve 53 and the outer periphery of the auxiliary suction cup 45. This prevents external air from entering the annular chamber 431 through the gap between the hollow outer ring 43 and the auxiliary suction cup 45, preventing negative pressure leakage in the annular chamber 431.

[0030] In some embodiments of the present invention, such as Figures 4 to 7As shown, the lower end face of the hollow outer ring 43 is provided with an annular sealing gasket 533 for forming a sealed interface with the surface of the plate 1. During the downward movement of the suction cup assembly 4 towards the surface of the plate 1, the hollow outer ring 43 is extended due to being limited by the positioning structure 44, with its lower end face positioned lower than the adsorption surfaces of the main suction cup 42 and the auxiliary suction cup 45. When the hollow outer ring 43 first contacts the plate 1, the annular sealing gasket 533 on its lower end face undergoes elastic compression deformation under contact pressure, tightly adhering to the surface of the plate 1, thus forming a continuous, closed sealed interface between the bottom of the hollow outer ring 43 and the plate 1. This provides the necessary airtight foundation for subsequent vacuuming of the area and establishment of a negative pressure dust removal environment via the extraction port 432.

[0031] Throughout the pre-contact and dust removal stages, the annular sealing gasket 533 remains in contact with the plate 1, effectively preventing external air from entering the annular chamber 431, ensuring stable local negative pressure, and preventing dust removal failure due to air leakage. This creates clean preconditions for reliable adsorption by the main suction cup 42 and the auxiliary suction cup 45.

[0032] In embodiments of the present invention, such as Figures 4 to 7As shown, a fixed base 6 is fixed on the mounting plate 41, and a pressing member 61 is located below the fixed base 6. A compression spring 62 is located between the pressing member 61 and the fixed base 6. The two ends of the compression spring 62 are fixedly connected to the upper ends of the fixed base 6 and the pressing member 61, respectively. The lower end of the pressing member 61 abuts against the upper end face of the annular guide sleeve 53. When the compression spring 62 is in its natural state, the pressing member 61 is pressed against the annular guide sleeve 53, causing the upper sealing ring 532 and the lower sealing ring 531 to abut. At this time, the lower end face of the hollow outer ring 43 is lower than the adsorption surface of the main suction cup 42 and the auxiliary suction cup 45. After the pressing member 61 is locked by the positioning structure 44, as the suction cup assembly 4 moves down as a whole, the annular sealing gasket 533 on the lower end face of the hollow outer ring 43 pre-contacts the surface of the plate 1, forming a reliable end face sealing fit. When the positioning structure 44 releases the locking of the pressing member 61, the pressing member 61 is no longer rigidly fixed. At this time, the suction cup assembly 4 continues to descend as a whole under the drive of the transport gantry 2. Since the hollow outer ring 43 has already contacted the surface of the plate 1, its position remains stationary. Meanwhile, the main suction cup 42 and the auxiliary suction cup 45 continue to move downward. This relative movement causes the auxiliary suction cup 45 and the main suction cup 42 to move closer to the plate 1, eventually causing the suction head 422 of the main suction cup 42 and the suction surface of the auxiliary suction cup 45 to successively adhere to the area of ​​the plate 1 that has been pre-cleaned by the hollow outer ring 43. At the same time, the pressing member 61 is still abutting against the upper end face of the annular guide sleeve 53, and the annular guide sleeve 53 is supported by the plate 1 along with the hollow outer ring 43 and cannot continue to descend, thereby compressing the compression spring 62 located between the pressing member 61 and the fixed seat 6. As the compression spring 62 is gradually tightened, the resulting elastic force acts in the opposite direction on the lower pressure member 61, which in turn continuously pushes the hollow outer ring 43 downward through the annular guide sleeve 53, ensuring that the annular sealing gasket 533 always fits tightly against the surface of the plate 1, maintaining airtightness. This prevents dust suspended in the environment from entering during the short interval between cleaning and vacuum adsorption establishment.

[0033] In some embodiments, such as Figures 4 to 10 As shown, the pressing component 61 includes a pressing ring 611 and a plurality of pressing feet 612 extending evenly along its circumference. A contact ring 613, coaxial with the annular guide sleeve 53, is fixedly connected between the pressing feet 612. The pressing ring 611 is slidably sleeved on the outer circumference of the negative pressure tube 421, and the contact ring 613 abuts against the upper end face of the annular guide sleeve 53. When the pressing component 61 presses against the annular guide sleeve 53 via the compression spring 62, the contact ring 613 experiences balanced force due to the even distribution of the pressing feet 612 along the circumference of the pressing ring 611. This ensures that the hollow outer ring 43 remains coaxial with the main suction cup 42 and the auxiliary suction cup 45 during the pressing or locking process, without tilting or shaking.

[0034] In some embodiments of the present invention, such as Figures 3 to 7As shown, the positioning structure 44 includes multiple positioning pins 441, which are evenly distributed around the circumference of the fixed base 6. The positioning pins 441 are capable of moving radially along the fixed base 6. The side wall of the fixed base 6 has a through-hole for the positioning pins 441 to slide within. The side wall of the lower pressure ring 611 has a limiting hole 6111 that cooperates with the positioning pins 441. Each positioning pin 441 is equipped with an electromagnetic actuator, and each positioning pin 441 is fitted with a return spring 442. One end of the return spring 442 is fixedly connected to the outer end of the positioning pin 441, and the other end is fixedly connected to the outer wall of the fixed base 6.

[0035] The electromagnetic actuator includes a fixed electromagnet 443 and a movable electromagnet 444. The movable electromagnet 444 is fixedly connected to a positioning pin 441, and the fixed electromagnet 443 is fixedly connected to a fixed base 6. When the fixed electromagnet 443 and the movable electromagnet 444 are energized, they attract each other, causing the positioning pin 441 to move inward into the fixed base 6. The elastic potential energy of the return spring 442 causes the positioning pin 441 to return outward. When the compression spring 62 is in its natural state, the positioning pin 441 is aligned with the limiting hole 6111. At this time, the electromagnetic actuator can drive the positioning pin 441 to insert into the limiting hole 6111. By having multiple positioning pins 441 simultaneously inserted into their corresponding limiting holes 6111, the lower pressure ring 611 is limited, thereby locking the lower pressure member 61 in a preset position. This ensures that the lower end face of the hollow outer ring 43 is lower than the main suction cup 42 and the auxiliary suction cup 45, preparing for pre-contact with the plate 1. When it is necessary to unlock and allow the main suction cup 42 and the auxiliary suction cup 45 to continue pressing down, the electromagnetic driver is de-energized, the return spring 442 returns to its natural state, and drives the positioning pin 441 to slide outward along the pin hole on the side wall of the fixed base 6, so that its inner end exits from the limiting hole 6111 of the pressing ring sleeve 611. Once the positioning pin 441 disengages from the limiting hole 6111, the pressing part 61 is released from axial constraint. During the subsequent downward movement of the suction cup assembly 4, the hollow outer ring 43 stays in contact with the plate 1, while the main suction cup 42 and the auxiliary suction cup 45 continue to move down to complete the adsorption, and the compression spring 62 is compressed at the same time.

[0036] This invention utilizes a hollow outer ring 43, locked by a positioning structure 44, to first contact the plate 1, forming an annular chamber 431 and creating a vacuum to remove surface dust and achieve pre-sealing. Because the adsorption surface of the auxiliary suction cup 45 is lower than that of the main suction cup 42 under the action of the pressure-holding spring 52, after the positioning structure 44 unlocks the hollow outer ring 43, the auxiliary suction cup 45 adheres to the plate 1 before the main suction cup 42, establishing an independent secondary negative pressure chamber 451 as adsorption redundancy. This effectively addresses localized failures of the main suction cup 42 and further improves the vacuum adsorption effect. After the hollow outer ring 43 is unlocked, the compression spring 62 continuously provides pressure, ensuring that its annular sealing gasket 533 is tightly adhered to the plate 1 throughout the process, isolating external contaminants. This improves the adsorption reliability and anti-drop performance of the plate 1 during handling.

[0037] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A vacuum adsorption transport device, characterized in that, include: A transport gantry and a vacuum adsorption mechanism, wherein the vacuum adsorption mechanism includes a hanger mounted on the transport gantry and a suction cup assembly arrayed on the hanger; The suction cup assembly includes: The mounting plate is fixedly connected to the hanger. The main suction cup consists of a negative pressure tube and a suction head. One end of the negative pressure tube is fixedly connected to the mounting plate, and the other end extends vertically downward. The suction head is fixedly installed on the lower extension end of the negative pressure tube. A primary negative pressure chamber is formed inside the main suction cup. A hollow outer ring is fitted around the outer periphery of the main suction cup. The inner diameter of the hollow outer ring is larger than the outer diameter of the main suction cup. An annular cavity is formed inside the hollow outer ring. An air extraction port is provided on the side wall of the hollow outer ring. The air extraction port connects the annular cavity to an external pipeline. The positioning structure, installed on the mounting plate, is used to apply axial limiting to the hollow outer ring. With the hollow outer ring in pre-contact with the surface of the plate, the hollow outer ring and the surface of the plate form a local negative pressure suction area.

2. The apparatus according to claim 1, characterized in that, The suction cup assembly also includes: A secondary suction cup is sleeved on the outer periphery of the negative pressure tube. The inner diameter of the secondary suction cup is larger than the outer diameter of the main suction cup. The main suction cup and the secondary suction cup enclose a secondary negative pressure cavity. The secondary suction cup is provided with a negative pressure interface that communicates with the secondary negative pressure cavity.

3. The apparatus according to claim 2, characterized in that, A sleeve is fixedly fitted on the negative pressure tube and above the suction head. An annular seal is provided on the inner wall of the upper end of the auxiliary suction cup. The annular seal is slidably sealed with the outer wall of the sleeve.

4. The apparatus according to claim 3, characterized in that, A pressure-holding spring is fitted on the sleeve. One end of the pressure-holding spring is fixedly connected to the sleeve, and the other end is fixedly connected to the annular seal. The adsorption surface of the auxiliary suction cup is lower than the adsorption surface of the main suction cup when the pressure-holding spring is in its natural state.

5. The apparatus according to claim 2, characterized in that, The inner diameter of the hollow outer ring is larger than the outer diameter of the auxiliary suction cup. The inner wall of the hollow outer ring is provided with an inwardly extending annular guide sleeve. The outer circumferential surface of the auxiliary suction cup slides in conjunction with the annular guide sleeve to form a radial limit.

6. The apparatus according to claim 5, characterized in that, The outer periphery of the auxiliary suction cup is provided with a lower sealing ring, and the bottom surface of the annular guide sleeve is provided with an upper sealing ring. The upper sealing ring and the lower sealing ring form an end face sealing fit under axial compression.

7. The apparatus according to claim 5, characterized in that, The lower end face of the hollow outer ring is provided with an annular sealing gasket, which is used to fit with the surface of the plate to form a sealing interface.

8. The apparatus according to claim 6, characterized in that, A fixed base is fixedly provided on the mounting plate, and a pressing member is provided below the fixed base. A compression spring is provided between the pressing member and the fixed base. The two ends of the compression spring are fixedly connected to the upper ends of the fixed base and the pressing member, respectively. The lower end of the pressing member abuts against the upper end face of the annular guide sleeve.

9. The apparatus according to claim 8, characterized in that, The pressing component includes a pressing ring and a plurality of pressing feet that extend uniformly along its circumference. A contact ring coaxial with the annular guide sleeve is fixedly connected between the plurality of pressing feet. The pressing ring is slidably sleeved on the outer periphery of the negative pressure tube, and the contact ring abuts against the upper end face of the annular guide sleeve.

10. The apparatus according to claim 9, characterized in that, The positioning structure includes multiple positioning pins, which are evenly distributed around the circumference of the fixed seat. The positioning pins are capable of moving radially along the fixed seat. The side wall of the fixed seat is provided with a pin hole for the positioning pin to slide therein. The side wall of the lower pressure ring is provided with a limiting hole that cooperates with the positioning pin.

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