Vacuum chuck device

Abstract

The application provides a vacuum chuck device, comprising a chuck and a connecting head; the chuck is used for grabbing a workpiece; the bottom end of the connecting head is connected with the chuck, the top end of the connecting head is used for being connected with an air pump, the connecting head has a connecting channel communicating between the top and bottom ends of the connecting head, and the connecting channel communicates with the inside of the chuck. The application guarantees the firmness of the chuck in grabbing the workpiece, and guarantees the stability and smoothness of grabbing, transporting and placing the workpiece.

Description

Technical Field

[0001] This application relates to the field of mechanical technology, and in particular to a vacuum suction cup device. Background Technology

[0002] Currently, suction cups are usually fixed to robotic arms. When a workpiece needs to be gripped, the robotic arm presses the suction cup onto the surface of the workpiece, creating a negative pressure inside the suction cup to achieve the effect of gripping the workpiece.

[0003] However, the inventors discovered that this workpiece gripping method not only failed to grip the workpiece firmly, but also required manual assistance to detach the workpiece from the suction cup when it was transported to the designated position, resulting in low stability and smoothness in gripping, transporting and placing the workpiece. Utility Model Content

[0004] This application provides a vacuum suction cup device to solve the problems of existing technologies, such as the inability to firmly grip workpieces and the low stability and smoothness of gripping, transporting, and placing workpieces.

[0005] This application provides a vacuum suction cup device, comprising: a suction cup and a connector;

[0006] The suction cup is used to grip the workpiece;

[0007] The bottom end of the connector is connected to the suction cup, and the top end of the connector is used to connect to the air pump. The connector has a connecting channel that connects the top and bottom ends of the connector and the connecting channel is connected to the inside of the suction cup.

[0008] In the above scheme, the inner wall of the connecting channel has connecting threads.

[0009] In the above solution, the suction cup includes: a suction cup base and a suction cup body;

[0010] The connector is inserted into the top of the suction cup base and connected to the suction cup base;

[0011] The suction cup base is fixed to the top of the suction cup body. The suction cup base has a negative pressure interface that connects the top and bottom ends of the suction cup base. The suction cup body has a suction cup cavity inside. The top end of the negative pressure interface is connected to the connecting channel, and the bottom end of the negative pressure interface is connected to the suction cup cavity.

[0012] The bottom of the suction cup body has an opening that connects the suction cup cavity to the outside, and the bottom end of the suction cup body is used to contact the workpiece and grip the workpiece.

[0013] In the above solution, the top of the suction cup seat has a groove for accommodating the connector;

[0014] The bottom end of the suction cup base is inserted into the suction cup cavity, and the space between the suction cup base and the side wall of the suction cup cavity is a receiving cavity, which is used to receive the folded suction cup body.

[0015] In the above solution, the suction cup body has a folded structure and the cross-section of the suction cup body is circular.

[0016] The inner surface of the suction cup body has at least one suction cup particle;

[0017] The bottom surface of the suction cup holder has at least one suction cup particle.

[0018] In the above scheme, the outer surface of the suction cup body has at least one reinforcing rib;

[0019] One end of the reinforcing rib faces the bottom end of the suction cup body;

[0020] The other end of the reinforcing rib is away from the bottom end of the suction cup body;

[0021] The inner surface of the suction cup body has at least one limiting rib ring;

[0022] The limiting rib ring is arranged around the axis of the suction cup body on the inner surface of the suction cup body.

[0023] In the above solution, the suction cup body has a sealing lip on its bottom outer contour.

[0024] In the above scheme, the longitudinal section of the negative pressure interface is a cylindrical structure.

[0025] In the above scheme, the longitudinal section of the negative pressure interface has a stepped structure;

[0026] The negative pressure interface has a small opening at the end facing the connector.

[0027] The end of the negative pressure interface facing the suction cup cavity is the larger end.

[0028] In the above solution, the groove has at least one annular groove, and the bottom end of the connector has at least one annular protrusion; one of the annular protrusions is used to insert into one of the annular grooves, so that the connector is connected to the suction cup seat.

[0029] This application provides a vacuum suction cup device that grips workpieces, avoiding scratches and damage to the workpiece surface during gripping. By connecting the bottom end of the connector to the suction cup and the top end of the connector to an air pump, a negative pressure environment can be quickly created inside the suction cup when it contacts the workpiece surface, ensuring the suction cup's firm grip on the workpiece.

[0030] Meanwhile, when the suction cup transports the workpiece to the designated position, an air pump can be used to inflate the inside of the suction cup, causing the suction cup to detach from the workpiece, thereby achieving the technical effect of loosening the workpiece and ensuring the stability and smoothness of gripping, transporting, and placing the workpiece. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0032] Figure 1 A top-view structural diagram of a vacuum suction cup device provided in this application;

[0033] Figure 2 A schematic diagram of the vacuum suction cup device provided in this application from a bottom angle;

[0034] Figure 3 A top view of a vacuum suction cup device provided in this application;

[0035] Figure 4 for Figure 3 A cross-sectional view of the AA section in Example 2;

[0036] Figure 5 for Figure 3 A cross-sectional view of the AA section in Example 3;

[0037] Figure 6 for Figure 3 A cross-sectional view of the AA section in Example 4.

[0038] Figure label:

[0039] 1: Suction cup;

[0040] 2: Connector;

[0041] 3: Suction cup particles;

[0042] 4: Reinforcing ribs;

[0043] 5: Limiting rib ring;

[0044] 6: Sealing lip;

[0045] 11: Suction cup mount;

[0046] 12: Suction cup body;

[0047] 13: Negative pressure interface;

[0048] 14: Suction cup cavity;

[0049] 15: Groove;

[0050] 16: Receiving cavity;

[0051] 17: Annular groove;

[0052] 21: Connection channel;

[0053] 22: Connecting thread;

[0054] 23: Ring-shaped protrusion.

[0055] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0056] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0057] The technical solutions of the embodiments of this application and how the technical solutions of the embodiments of this application solve the current problems are described in detail below with specific examples. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0058] Example 1:

[0059] Please see Figures 1-3 This application provides a vacuum suction cup device, including: a suction cup 1 and a connector 2;

[0060] The suction cup 1 is used to grip the workpiece;

[0061] The bottom end of the connector 2 is connected to the suction cup 1, and the top end of the connector 2 is used to connect to the air pump. The connector 2 has a connecting channel 21 that connects the top and bottom ends of the connector 2, and the connecting channel 21 is connected to the inside of the suction cup 1.

[0062] In this example, the suction cup 1 is used to grip the workpiece, avoiding scratches and damage to the workpiece surface during gripping. By connecting the bottom end of the connector 2 to the suction cup 1 and the top end of the connector 2 to the air pump, a negative pressure environment can be quickly created inside the suction cup 1 when it contacts the workpiece surface, ensuring the firmness of the suction cup 1 in gripping the workpiece.

[0063] Meanwhile, when the suction cup 1 transports the workpiece to the designated position, air can be pumped into the suction cup 1 to detach the suction cup 1 from the workpiece, thereby achieving the technical effect of loosening the workpiece and ensuring the stability and smoothness of gripping, transporting and placing the workpiece.

[0064] In a preferred embodiment, the suction cup 1 includes: a suction cup base 11 and a suction cup body 12;

[0065] The connector 2 is inserted into the top of the suction cup base 11 and connected to the suction cup base 11;

[0066] The suction cup base 11 is fixed to the top of the suction cup body 12. The suction cup base 11 has a negative pressure interface 13 that connects the top and bottom ends of the suction cup base 11. The suction cup body 12 has a suction cup cavity 14 inside. The top end of the negative pressure interface 13 is connected to the connecting channel 21, and the bottom end of the negative pressure interface 13 is connected to the suction cup cavity 14.

[0067] The bottom of the suction cup body 12 has an opening that connects the suction cup cavity 14 to the outside. The bottom end of the suction cup body 12 is used to contact the workpiece and grip the workpiece.

[0068] In this example, a suction cup seat 11 is provided to ensure the connection strength between the connector 2 and the suction cup 1; a suction cup body 12 is provided to cover the opening of the workpiece and then be deformed by the air suction of the connector 2 to grip the workpiece.

[0069] By setting the negative pressure port 13 in the suction cup seat 11, the air in the suction cup cavity 14 can be evacuated, thereby achieving the technical effect of adsorbing the workpiece onto the workpiece and gripping the workpiece.

[0070] Optionally, the suction cup seat 11 serves as the core component for air circuit connection and structural support, undertaking the tasks of fixing the connector 2, negative pressure transmission, and sealing isolation.

[0071] The suction cup base 11 is equipped with a standardized pneumatic interface (such as a G1 / 4 thread or quick-connect coupling) on ​​its top, compatible with different pneumatic devices. The bottom end is double-fixed to the suction cup body 12 via mechanical locking and a sealing ring (e.g., M6 bolt preload ≥15 N·m, with a fluororubber O-ring, compression rate 15%–20%). An internal negative pressure guide channel (3 mm wide, 1.5 mm deep) is designed to prevent pressure loss caused by localized airflow turbulence.

[0072] The suction cup 12 directly contacts the surface of the workpiece and forms a vacuum cavity through deformation sealing to achieve adsorption and gripping.

[0073] The suction cup cavity 14 adopts a hyperboloidal conical design (top diameter 30mm, bottom diameter 45mm, taper 15°) to enhance adaptability to uneven surfaces. A flexible lip (1.2mm thickness, Shore A hardness 50A) is provided at the bottom opening edge, and micro-leakage compensation is achieved through pre-compression (compression amount 0.5mm). The suction cup body 12 features a gradient wall thickness design (3mm at the top → 1.5mm at the bottom) to balance rigidity and flexibility.

[0074] In a preferred embodiment, the top end of the suction cup seat 11 has a groove 15 for accommodating the connector 2;

[0075] The bottom end of the suction cup base 11 is inserted into the suction cup cavity 14. The space between the suction cup base 11 and the side wall of the suction cup cavity 14 is a receiving cavity 16, which is used to receive the folded suction cup body 12.

[0076] In this example, the groove 15 is designed to position the connector 2 on the suction cup seat 11, ensuring the stability of the connector 2. The groove 15 of the suction cup seat 11 is a blind hole structure (depth H = 8~15mm, tolerance ±0.05mm), and a guide cone surface (taper 10°~15°, length 2mm) is provided at the bottom to facilitate quick alignment of the connector 2. The inner wall of the groove 15 is machined with annular grooves 17 (number 1~3, groove width W = 1.5~2.5mm, groove depth D = 0.8~1.2mm, surface roughness Ra≤0.8μm). The main annular groove 17 (closest to the opening of the groove 15) provides axial positioning and primary sealing, while the secondary grooves provide redundant sealing and anti-rotation constraints.

[0077] By inserting the bottom end of the suction cup base 11 into the interior of the suction cup body 12, the bottom end face of the suction cup base 11 can contact the surface of the workpiece when the suction cup body 12 is compressed. This ensures that no air will appear inside the suction cup body 12 when the suction cup 1 picks up the workpiece, thus guaranteeing the firmness of the suction cup 1 in gripping the workpiece.

[0078] For example, the suction cup base 11 serves as a support body, with its bottom end inserted into the suction cup cavity 14 to form a movable connection structure. The suction cup base 11 may integrate airflow channels or mechanical transmission components (such as springs or connecting rods) to control the unfolding and folding of the suction cup 1.

[0079] The suction cup cavity 14 has a hollow structure, and an annular receiving cavity 16 is formed between the side wall and the suction cup seat 11. The opening end of the suction cup cavity 14 is designed with a sealing groove or elastic sealing ring to ensure that the suction cup 1 forms an airtight contact with the adsorption surface when it is unfolded.

[0080] The receiving cavity 16 is located between the suction cup base 11 and the side wall of the suction cup cavity 14, and is used to store the folded suction cup body 12. Its shape perfectly matches the folded suction cup body 12, avoiding wasted space.

[0081] The suction cup 12 is reversibly folded using a flexible hinge or shape memory alloy material. After folding, it forms a compact cylindrical or spiral shape and is completely housed within the receiving cavity 16.

[0082] Compressed air is injected into the suction cup cavity 14 through the airflow channel in the suction cup base 11, pushing the suction cup body 12 to unfold to the working position.

[0083] In a preferred embodiment, the suction cup body 12 has a folded structure and the cross-section of the suction cup body 12 is circular.

[0084] The inner surface of the suction cup body 12 has at least one suction cup particle 3;

[0085] The bottom surface of the suction cup seat 11 has at least one suction cup particle 3.

[0086] In this example, the traditional suction cup 1 has strong adhesion on smooth surfaces, but it is prone to air leakage and failure on rough, curved, or irregular surfaces. This example utilizes an unfoldable folding structure (such as accordion pleats) to automatically conform to the surface shape during adhesion, increasing the actual contact area and forming multiple sealing rings, significantly improving its adaptability to uneven surfaces. Optionally, the folding structure is a 1.5-fold structure.

[0087] For example, an accordion-style annular pleats (pleat height 5mm, pleat spacing 3mm) are used, and rigid-flexible coupling deformation is achieved through a gradient design of the elastic modulus of the silicone matrix (surface Shore hardness 30A, substrate 60A). After folding and unfolding, 3-5 concentric sealing rings are formed, each ring can independently compensate for a 0.5mm surface height difference, with a total compensation capacity of 2.5mm, adaptable to cast iron (Ra6.3μm) to sandblasted steel (Ra25μm) surfaces. The circular cross-section achieves uniform stress distribution in both the radial and circumferential directions, and the maximum Mises stress is reduced by 30%-50% compared to non-circular cross-sections (such as square or elliptical). The moment of inertia of the cross-section (I=πr) 4 / 4) As the radius increases to the fourth power, the deformation resistance is significantly enhanced, making it suitable for high-pressure adsorption scenarios (pressure > 0.5 MPa). The stress concentration factor (Kt = 1) is minimized, within 10 6 The fatigue strength retention rate under cyclic loading is >90%. The circular edge induces laminar flow, reducing turbulence intensity by 70% and minimizing pressure fluctuations during adsorption (ΔP < ±0.1 kPa). The minimum ratio of the cross-sectional hydraulic diameter (Dh = 2r) to the volume enables rapid filling / de-gasping of the vacuum chamber, shortening the response time to less than 50 ms.

[0088] In this example, by setting suction cup particles 3 on the suction cup body 12 and the suction cup base 11, when the suction cup 1 grips the workpiece, the suction cup particles 3 are squeezed onto the workpiece and deformed, so as to prevent the workpiece from moving laterally on the suction cup 1, thereby improving the workpiece gripping stability.

[0089] For example, the suction cup particles 3 are made of highly elastic materials (such as silicone or TPU), which undergo local deformation upon contact with the workpiece, forming a microscopic "interlocking" structure. The deformed particles mechanically interlock with the workpiece surface, converting sliding friction into shear friction, increasing the coefficient of friction by 3-5 times.

[0090] The elastic restoring force of the particles forms a reverse resistance. When the workpiece tends to move laterally, the stress field generated by the deformation of the particles can offset part of the external force.

[0091] The suction cup 12 forms a macroscopic airtight layer with the workpiece surface. The particle group fills the workpiece surface roughness (Ra value range 0.1-10μm) at the microscale, forming an air film barrier layer and reducing the risk of leakage.

[0092] Employing a honeycomb-like hexagonal close-packed structure, the particle spacing is controlled between 0.5-1.0 mm to ensure that deformation does not interfere with each other and covers the entire surface. The particle diameter in the central area is 2-3 mm, gradually decreasing to 1-1.5 mm at the edges, forming a pressure gradient field to guide the workpiece into a centered position. The particle height is 1.5-2.0 mm, with a deformation allowance of 0.8-1.2 mm, accommodating the hardness differences of workpieces made of different materials (such as metal, plastic, and glass).

[0093] The suction cup body 12 is made of silicone with a Shore A hardness of 60A, and the particle layer is made of soft rubber with a Shore A hardness of 40A, and is integrally molded by two-color injection molding. A 0.3mm thick aramid fiber mesh is embedded between the suction cup body 12 and the particle layer to prevent interlayer delamination under large deformation.

[0094] In a preferred embodiment, the outer surface of the suction cup body 12 has at least one reinforcing rib 4;

[0095] One end of the reinforcing rib 4 faces the bottom end of the suction cup body 12;

[0096] The other end of the reinforcing rib 4 is away from the bottom end of the suction cup body 12;

[0097] The inner surface of the suction cup body 12 has at least one limiting rib ring 5;

[0098] The limiting rib ring 5 is arranged around the axis of the suction cup body 12 on the inner surface of the suction cup body 12.

[0099] In this example, the overall strength of the suction cup body 12 is improved by setting the reinforcing rib 4, so as to avoid deformation and bending of the suction cup body 12 after frequent deformation.

[0100] For example, the stiffener 4 changes the stress distribution during the deformation of the suction cup body 12, transforming concentrated stress into distributed stress transmitted along the stiffener, thereby reducing the local strain energy density. The axial stiffness (EA value) of the stiffener increases the overall bending modulus of the suction cup body 12, suppressing the cumulative plastic deformation caused by repeated deformation.

[0101] By absorbing deformation energy through the damping effect of the ribs, the molecular chain breakage rate of the suction cup body 12 material (such as silicone) is reduced. This increases the fatigue life of the suction cup 1 from the traditional design of 50,000 cycles to more than 200,000 cycles (under the condition of Δ strain amplitude of 20%).

[0102] The design employs a trapezoidal cross-section (1.0mm wide at the top, 2.5mm wide at the bottom, and 3.0mm high). The wide bottom design enhances root strength, while the tapering at the top reduces the impact on the flexibility of suction cup 1. Twenty-four ribs radiate from the center of suction cup 1 towards the edge at 15° intervals, enhancing radial tear resistance. Alternatively, the ribs can be arranged along an Archimedean spiral (polar equation r = a + bθ) with a 10mm pitch to improve torsional stiffness under dynamic loads. Or, an orthogonal rib grid (8mm x 8mm spacing) can form a bidirectional support frame, suitable for high-precision positioning scenarios.

[0103] When the suction cup body 12 is folded, the suction force of the air pump may be too large, causing the suction cup body 12 to deform and become biased, resulting in the suction cup 1 being unable to reliably grasp the workpiece. To address this, the limiting rib ring 5 is set to prevent the suction cup body 12 from deforming too much when adsorbing the workpiece, thus avoiding the deformation of the suction cup body 12 and improving the service life and reliability of the suction cup 1.

[0104] For example, the limiting rib ring 5 restricts the radial expansion of the suction cup body 12 through rigid constraint, transforming the deformation mode under the suction force of the air pump into a controllable axial contraction. The axial stiffness (EA value) of the rib ring increases the overall bending modulus of the suction cup body 12, suppresses the cumulative plastic deformation caused by repeated deformation, and avoids adsorption failure of the suction cup body 12 due to excessive deformation.

[0105] By absorbing deformation energy through the damping effect of the rib ring, the molecular chain breakage rate of the suction cup body 12 material (such as silicone) is reduced. The fatigue life of the suction cup 1 is increased from the traditional design of 50,000 cycles to more than 200,000 cycles (under the condition of Δ strain amplitude of 20%).

[0106] The limiting rib ring 5 structure includes:

[0107] Single-ring structure: suitable for low-load scenarios. The rib ring is located at 1 / 3 of the height from the edge of the suction cup body, balancing the requirements of rigidity and flexibility.

[0108] Multi-ring structure: In high-load scenarios, a double-ring or triple-ring layout is adopted, with the ring spacing being 1 / 5 of the radius of the suction cup body, which enhances the suppression effect on different deformation modes.

[0109] Spiral ring structure: The ribs are arranged along the Archimedean spiral with a pitch of 10mm, which improves the torsional stiffness under dynamic load.

[0110] Mesh layout: Orthogonal ribbed mesh (8mm×8mm spacing) forms a two-way support frame, suitable for high-precision positioning scenarios.

[0111] In a preferred embodiment, the suction cup body 12 has a sealing lip 6 on its bottom outer contour.

[0112] In this example, by setting the sealing lip 6, the contact area between the suction cup body 12 and the workpiece is increased. While ensuring the airtightness of the suction cup body 12 and the workpiece, the friction between the suction cup body 12 and the workpiece is also increased, thereby improving the firmness of the suction cup body 12 in grasping the workpiece and the lateral stability of the workpiece on the suction cup body 12.

[0113] For example, the sealing lip 6, with its 15° tilt angle design, forms an initial airtight layer with the workpiece surface during adsorption, preventing atmospheric air from entering the adsorption area. The lip surface features micro-protrusions (50-100 μm in height) on the order of 0.1 mm, filling the workpiece surface roughness (Ra value 0.1-10 μm) and forming a secondary airtight barrier. The lip material has a Shore hardness of 30A and undergoes creep deformation under low pressure, automatically adapting to the workpiece surface morphology and maintaining long-term sealing performance.

[0114] The micro-protrusions of the sealing lip 6 embed into the workpiece surface under contact pressure, generating a resistance component perpendicular to the sliding direction and increasing the coefficient of friction. The sealed cavity formed by the sealing lip 6 enhances the vacuum negative pressure effect, and the normal adsorption force and friction force form a spatial orthogonal reinforcement system.

[0115] In a preferred embodiment, the inner wall of the connecting channel 21 has a connecting thread 22;

[0116] In this example, the connector 2 is connected to the air pump via the connecting thread 22.

[0117] For example, standard threads (such as M12×1.5 metric fine thread) are machined at both ends of the connector, forming a helical pair with the internal thread of the air pump interface, achieving axial locking through rotation. The thread helix angle is less than the equivalent friction angle, maintaining connection reliability under vibration conditions and preventing accidental loosening. The thread crest and root form a metal-to-metal contact seal, which, together with the end face O-ring, provides double airtightness. ISO 228-1 standard pipe threads are used, compatible with mainstream air pump brands, reducing the types of spare parts. A recommended torque value is set for the threaded connection (e.g., 8-10 N·m for M12 threads), and quantitative assembly is achieved using a torque wrench to avoid overload or underload.

[0118] Employing a 60° V-type thread with a thread angle consistent with metric threads enhances meshing compatibility. The fine thread (1.5mm pitch) offers stronger resistance to vibration and loosening, and higher connection accuracy compared to coarse threads. The effective meshing length is ≥10mm (M12 thread), ensuring a connection strength ≥2 times the working pressure of the air pump (designed at 2MPa).

[0119] An O-ring groove (2.5mm diameter) is provided on the end face of connector 2, and a fluororubber (FKM) O-ring is embedded, with a temperature resistance range of -20℃ to 200℃. The threaded surface is coated with polytetrafluoroethylene (PTFE) sealant to fill the tooth gaps and achieve a zero-leakage seal. A guide chamfer (30°) is machined at the end of connector 2 to mate with the conical surface of the air pump interface, ensuring a 100% success rate for alignment on the first attempt.

[0120] Example 2:

[0121] Please see Figures 1-4 Based on Embodiment 1, this application provides a vacuum suction cup device, including: a suction cup 1 and a connector 2;

[0122] The suction cup 1 is used to grip the workpiece;

[0123] The bottom end of the connector 2 is connected to the suction cup 1, and the top end of the connector 2 is used to connect to the air pump. The connector 2 has a connecting channel 21 that connects the top and bottom ends of the connector 2, and the connecting channel 21 is connected to the inside of the suction cup 1.

[0124] In a preferred embodiment, the suction cup 1 includes: a suction cup base 11 and a suction cup body 12;

[0125] The connector 2 is inserted into the top of the suction cup base 11 and connected to the suction cup base 11;

[0126] The suction cup base 11 is fixed to the top of the suction cup body 12. The suction cup base 11 has a negative pressure interface 13 that connects the top and bottom ends of the suction cup base 11. The suction cup body 12 has a suction cup cavity 14 inside. The top end of the negative pressure interface 13 is connected to the connecting channel 21, and the bottom end of the negative pressure interface 13 is connected to the suction cup cavity 14.

[0127] The bottom of the suction cup body 12 has an opening that connects the suction cup cavity 14 to the outside. The bottom end of the suction cup body 12 is used to contact the workpiece and grip the workpiece.

[0128] In a preferred embodiment, the top end of the suction cup seat 11 has a groove 15 for accommodating the connector 2;

[0129] The bottom end of the suction cup base 11 is inserted into the suction cup cavity 14. The space between the suction cup base 11 and the side wall of the suction cup cavity 14 is a receiving cavity 16, which is used to receive the folded suction cup body 12.

[0130] In a preferred embodiment, the suction cup body 12 has a folded structure and the cross-section of the suction cup body 12 is circular.

[0131] The inner surface of the suction cup body 12 has at least one suction cup particle 3;

[0132] The bottom surface of the suction cup seat 11 has at least one suction cup particle 3.

[0133] In a preferred embodiment, the outer surface of the suction cup body 12 has at least one reinforcing rib 4;

[0134] One end of the reinforcing rib 4 faces the bottom end of the suction cup body 12;

[0135] The other end of the reinforcing rib 4 is away from the bottom end of the suction cup body 12;

[0136] The inner surface of the suction cup body 12 has at least one limiting rib ring 5;

[0137] The limiting rib ring 5 is arranged around the axis of the suction cup body 12 on the inner surface of the suction cup body 12.

[0138] In a preferred embodiment, the suction cup body 12 has a sealing lip 6 on its bottom outer contour.

[0139] In a preferred embodiment, the inner wall of the connection channel 21 has a connection thread 22.

[0140] In a preferred embodiment, the negative pressure interface 13 has a cylindrical cross-section.

[0141] In this example, the cylindrical flow channel (hydraulic diameter Dh = 10 mm) is controlled by Reynolds number (Re < 2300) to ensure that the airflow is in a laminar state, reducing the turbulence intensity by 65% ​​and reducing pressure loss (ΔP < 0.05 kPa / m).

[0142] At the point where the flow channel cross section of the negative pressure interface 13 changes abruptly, a 1:10 taper transition can be used to avoid pressure fluctuations caused by sudden changes in flow velocity, and the standard deviation (σ) of the pressure distribution on the adsorption surface is <0.02MPa.

[0143] The inner wall of the negative pressure interface 13 has a surface finish Ra < 0.2 μm, and is equipped with a streamlined guide groove to prevent particle accumulation (self-cleaning efficiency > 95% when particle size > 50 μm).

[0144] Example 3:

[0145] Please see Figures 1-3 ,as well as Figure 5 Based on Embodiment 1, this application provides a vacuum suction cup device, including: a suction cup 1 and a connector 2;

[0146] The suction cup 1 is used to grip the workpiece;

[0147] The bottom end of the connector 2 is connected to the suction cup 1, and the top end of the connector 2 is used to connect to the air pump. The connector 2 has a connecting channel 21 that connects the top and bottom ends of the connector 2, and the connecting channel 21 is connected to the inside of the suction cup 1.

[0148] In a preferred embodiment, the suction cup 1 includes: a suction cup base 11 and a suction cup body 12;

[0149] The connector 2 is inserted into the top of the suction cup base 11 and connected to the suction cup base 11;

[0150] The suction cup base 11 is fixed to the top of the suction cup body 12. The suction cup base 11 has a negative pressure interface 13 that connects the top and bottom ends of the suction cup base 11. The suction cup body 12 has a suction cup cavity 14 inside. The top end of the negative pressure interface 13 is connected to the connecting channel 21, and the bottom end of the negative pressure interface 13 is connected to the suction cup cavity 14.

[0151] The bottom of the suction cup body 12 has an opening that connects the suction cup cavity 14 to the outside. The bottom end of the suction cup body 12 is used to contact the workpiece and grip the workpiece.

[0152] In a preferred embodiment, the top end of the suction cup seat 11 has a groove 15 for accommodating the connector 2;

[0153] The bottom end of the suction cup base 11 is inserted into the suction cup cavity 14. The space between the suction cup base 11 and the side wall of the suction cup cavity 14 is a receiving cavity 16, which is used to receive the folded suction cup body 12.

[0154] In a preferred embodiment, the suction cup body 12 has a folded structure and the cross-section of the suction cup body 12 is circular.

[0155] The inner surface of the suction cup body 12 has at least one suction cup particle 3;

[0156] The bottom surface of the suction cup seat 11 has at least one suction cup particle 3.

[0157] In a preferred embodiment, the outer surface of the suction cup body 12 has at least one reinforcing rib 4;

[0158] One end of the reinforcing rib 4 faces the bottom end of the suction cup body 12;

[0159] The other end of the reinforcing rib 4 is away from the bottom end of the suction cup body 12;

[0160] The inner surface of the suction cup body 12 has at least one limiting rib ring 5;

[0161] The limiting rib ring 5 is arranged around the axis of the suction cup body 12 on the inner surface of the suction cup body 12.

[0162] In a preferred embodiment, the suction cup body 12 has a sealing lip 6 on its bottom outer contour.

[0163] In a preferred embodiment, the inner wall of the connection channel 21 has a connection thread 22.

[0164] In a preferred embodiment, the groove 15 has at least one annular groove 17, and the bottom end of the connector 2 has at least one annular protrusion 23; one of the annular protrusions 23 is used to insert into one of the annular grooves 17, so that the connector 2 is connected to the suction cup seat 11.

[0165] In this example, the connector 2 is fixed to the suction cup seat 11 by setting mutually matching annular grooves 17 and annular protrusions 23. The annular protrusions 23 have a square or semi-circular cross-section (radius R = 0.75~1.25mm, clearance with the annular groove 17 0.05~0.1mm), and the top is chamfered C0.2 to reduce insertion resistance. The number of protrusions corresponds one-to-one with the annular grooves 17, and the protrusion height H' = D - 0.05mm (interference of 0.05mm for pre-tightening).

[0166] The main protrusion and the main annular groove 17 form a mechanical interference seal (sealing force F=μ×P×A,μ=0.12,P=0.5MPa,A=πDL), and the secondary protrusion provides an anti-loosening guarantee.

[0167] Sealing level control between suction cup seat 11 and connector 2:

[0168] Primary seal: The metal-to-metal interference fit between the annular protrusion 23 and the annular groove 17 (compression ratio 5% to 8%) can withstand a pressure ≥0.6MPa.

[0169] Secondary sealing: High-temperature resistant sealant (such as Loctite 587, Shore hardness 70D after curing) is pre-placed at the bottom of the main annular groove 17 to fill the micro gaps, with a temperature resistance of -50℃ to 150℃.

[0170] Three-level sealing: The outer wall of connector 2 and the inner wall of groove 15 are sealed with a micro-gap (gap 0.02~0.05mm), and molecular-level adsorption is achieved by matching surface roughness (Ra≤0.4μm).

[0171] The secondary annular groove 17 and the protrusion are fitted with an asymmetrical angle (groove sidewall angle α = 88°, protrusion sidewall angle β = 92°) to form a self-locking wedge structure with an axial pull-out force ≥ 200N.

[0172] The outer wall of connector 2 is knurled (depth 0.2mm, pitch 1mm) to increase the coefficient of friction with the material of suction cup seat 11 (μ≥0.3).

[0173] In a preferred embodiment, the negative pressure interface 13 has a cylindrical cross-section.

[0174] In this example, the cylindrical flow channel (hydraulic diameter Dh = 10 mm) is controlled by Reynolds number (Re < 2300) to ensure that the airflow is in a laminar state, reducing the turbulence intensity by 65% ​​and reducing pressure loss (ΔP < 0.05 kPa / m).

[0175] At the point where the flow channel cross section of the negative pressure interface 13 changes abruptly, a 1:10 taper transition can be used to avoid pressure fluctuations caused by sudden changes in flow velocity, and the standard deviation (σ) of the pressure distribution on the adsorption surface is <0.02MPa.

[0176] The inner wall of the negative pressure interface 13 has a surface finish Ra < 0.2 μm, and is equipped with a streamlined guide groove to prevent particle accumulation (self-cleaning efficiency > 95% when particle size > 50 μm).

[0177] Example 4:

[0178] Please see Figures 1-3 ,as well as Figure 6 Based on Embodiment 1, this application provides a vacuum suction cup device, including: a suction cup 1 and a connector 2;

[0179] The suction cup 1 is used to grip the workpiece;

[0180] The bottom end of the connector 2 is connected to the suction cup 1, and the top end of the connector 2 is used to connect to the air pump. The connector 2 has a connecting channel 21 that connects the top and bottom ends of the connector 2, and the connecting channel 21 is connected to the inside of the suction cup 1.

[0181] In a preferred embodiment, the suction cup 1 includes: a suction cup base 11 and a suction cup body 12;

[0182] The connector 2 is inserted into the top of the suction cup base 11 and connected to the suction cup base 11;

[0183] The suction cup base 11 is fixed to the top of the suction cup body 12. The suction cup base 11 has a negative pressure interface 13 that connects the top and bottom ends of the suction cup base 11. The suction cup body 12 has a suction cup cavity 14 inside. The top end of the negative pressure interface 13 is connected to the connecting channel 21, and the bottom end of the negative pressure interface 13 is connected to the suction cup cavity 14.

[0184] The bottom of the suction cup body 12 has an opening that connects the suction cup cavity 14 to the outside. The bottom end of the suction cup body 12 is used to contact the workpiece and grip the workpiece.

[0185] In a preferred embodiment, the top end of the suction cup seat 11 has a groove 15 for accommodating the connector 2;

[0186] The bottom end of the suction cup base 11 is inserted into the suction cup cavity 14. The space between the suction cup base 11 and the side wall of the suction cup cavity 14 is a receiving cavity 16, which is used to receive the folded suction cup body 12.

[0187] In a preferred embodiment, the suction cup body 12 has a folded structure and the cross-section of the suction cup body 12 is circular.

[0188] The inner surface of the suction cup body 12 has at least one suction cup particle 3;

[0189] The bottom surface of the suction cup seat 11 has at least one suction cup particle 3.

[0190] In a preferred embodiment, the outer surface of the suction cup body 12 has at least one reinforcing rib 4;

[0191] One end of the reinforcing rib 4 faces the bottom end of the suction cup body 12;

[0192] The other end of the reinforcing rib 4 is away from the bottom end of the suction cup body 12;

[0193] The inner surface of the suction cup body 12 has at least one limiting rib ring 5;

[0194] The limiting rib ring 5 is arranged around the axis of the suction cup body 12 on the inner surface of the suction cup body 12.

[0195] In a preferred embodiment, the suction cup body 12 has a sealing lip 6 on its bottom outer contour.

[0196] In a preferred embodiment, the inner wall of the connection channel 21 has a connection thread 22.

[0197] In a preferred embodiment, the groove 15 has at least one annular groove 17, and the bottom end of the connector 2 has at least one annular protrusion 23; one of the annular protrusions 23 is used to insert into one of the annular grooves 17, so that the connector 2 is connected to the suction cup seat 11.

[0198] In this example, the connector 2 is fixed to the suction cup seat 11 by setting mutually matching annular grooves 17 and annular protrusions 23. The annular protrusions 23 have a square or semi-circular cross-section (radius R = 0.75~1.25mm, clearance with the annular groove 17 0.05~0.1mm), and the top is chamfered C0.2 to reduce insertion resistance. The number of protrusions corresponds one-to-one with the annular grooves 17, and the protrusion height H' = D - 0.05mm (interference of 0.05mm for pre-tightening).

[0199] The main protrusion and the main annular groove 17 form a mechanical interference seal (sealing force F=μ×P×A,μ=0.12,P=0.5MPa,A=πDL), and the secondary protrusion provides an anti-loosening guarantee.

[0200] Sealing level control between suction cup seat 11 and connector 2:

[0201] Primary seal: The metal-to-metal interference fit between the annular protrusion 23 and the annular groove 17 (compression ratio 5% to 8%) can withstand a pressure ≥0.6MPa.

[0202] Secondary sealing: High-temperature resistant sealant (such as Loctite 587, Shore hardness 70D after curing) is pre-placed at the bottom of the main annular groove 17 to fill the micro gaps, with a temperature resistance of -50℃ to 150℃.

[0203] Three-level sealing: The outer wall of connector 2 and the inner wall of groove 15 are sealed with a micro-gap (gap 0.02~0.05mm), and molecular-level adsorption is achieved by matching surface roughness (Ra≤0.4μm).

[0204] The secondary annular groove 17 and the protrusion are fitted with an asymmetrical angle (groove sidewall angle α = 88°, protrusion sidewall angle β = 92°) to form a self-locking wedge structure with an axial pull-out force ≥ 200N.

[0205] The outer wall of connector 2 is knurled (depth 0.2mm, pitch 1mm) to increase the coefficient of friction with the material of suction cup seat 11 (μ≥0.3).

[0206] In a preferred embodiment, the longitudinal section of the negative pressure interface 13 has a stepped structure;

[0207] The negative pressure interface 13 has a small opening at one end facing the connector 2;

[0208] The end of the negative pressure interface 13 facing the suction cup cavity 14 is the larger end.

[0209] In this example, connecting the large end to the suction cup cavity 14 can evenly distribute the negative pressure and avoid sealing failure caused by local pressure concentration.

[0210] The stepped interface (1:10 taper) disperses the negative pressure into a ring-shaped flow field, reducing the velocity gradient by 60% and preventing seal failure caused by excessively high local flow velocities (>10m / s). The large end is embedded with 316L stainless steel wire mesh (60% porosity), dispersing the negative pressure impact force into radial stress, reducing stress peaks at the two connectors by 75%. The folded section adopts a variable cross-section design (1.5mm wall thickness at the root, 0.8mm at the tip), reducing the stress concentration factor (Kt) from 3.2 to 1.8, and achieving a fatigue life exceeding 2 million cycles.

[0211] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0212] Other embodiments of the present application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. The embodiments of this application are intended to cover any variations, uses, or adaptations of the embodiments of this application that follow the general principles of the embodiments of this application and include common knowledge or customary technical means in the art not disclosed in the embodiments of this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the embodiments of this application are indicated by the following claims.

[0213] It should be understood that the embodiments of this application are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments of this application is limited only by the appended claims.

Claims

1. A vacuum suction cup device, characterized in that, include: A suction cup and a connector; The suction cup is used to grip the workpiece; The bottom end of the connector is connected to the suction cup, and the top end of the connector is used to connect to the air pump. The connector has a connecting channel that connects the top and bottom ends of the connector and the connecting channel is connected to the inside of the suction cup.

2. The vacuum suction cup device according to claim 1, characterized in that, The inner wall of the connecting channel has connecting threads.

3. The vacuum suction cup device according to claim 1, characterized in that, The suction cup includes: a suction cup base and a suction cup body; The connector is inserted into the top of the suction cup base and connected to the suction cup base; The suction cup base is fixed to the top of the suction cup body. The suction cup base has a negative pressure interface that connects the top and bottom ends of the suction cup base. The suction cup body has a suction cup cavity inside. The top end of the negative pressure interface is connected to the connecting channel, and the bottom end of the negative pressure interface is connected to the suction cup cavity. The bottom of the suction cup body has an opening that connects the suction cup cavity to the outside, and the bottom end of the suction cup body is used to contact the workpiece and grip the workpiece.

4. The vacuum suction cup device according to claim 3, characterized in that, The top of the suction cup holder has a groove for accommodating the connector. The bottom end of the suction cup base is inserted into the suction cup cavity, and the space between the suction cup base and the side wall of the suction cup cavity is a receiving cavity, which is used to receive the folded suction cup body.

5. The vacuum suction cup device according to claim 3, characterized in that, The suction cup body has a folded structure, and the cross-section of the suction cup body is a circular structure; The inner surface of the suction cup body has at least one suction cup particle; The bottom surface of the suction cup holder has at least one suction cup particle.

6. The vacuum suction cup device according to claim 3, characterized in that, The outer surface of the suction cup body has at least one reinforcing rib; One end of the reinforcing rib faces the bottom end of the suction cup body; The other end of the reinforcing rib is away from the bottom end of the suction cup body; The inner surface of the suction cup body has at least one limiting rib ring; The limiting rib ring is arranged around the axis of the suction cup body on the inner surface of the suction cup body.

7. The vacuum suction cup device according to claim 3, characterized in that, The suction cup body has a sealing lip on its bottom outer contour.

8. The vacuum suction cup device according to claim 3, characterized in that, The negative pressure interface has a cylindrical cross-section.

9. The vacuum suction cup device according to claim 3, characterized in that, The longitudinal section of the negative pressure interface has a stepped structure; The negative pressure interface has a small opening at the end facing the connector. The end of the negative pressure interface facing the suction cup cavity is the larger end.

10. The vacuum suction cup device according to claim 4, characterized in that, The groove has at least one annular groove, and the bottom end of the connector has at least one annular protrusion; one of the annular protrusions is used to insert into one of the annular grooves, so that the connector is connected to the suction cup seat.

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