Electric sucker

Abstract

The invention relates to the technical field of electric tools, and provides an electric suction cup which comprises a handle device, a base element and a sealing element, the handle device is connected with one end face of the base element, and an annular connecting structure is formed on the circumferential edge of the other end face, away from the handle device, of the base element. The connecting structure is connected with the sealing element. The first flange structure wraps the peripheral side surfaces of the base element and is matched with the buckles for clamping, so that radial and axial double constraints are formed; the threaded connection further strengthens the fixing reliability through the first threaded hole, the sealing piece is prevented from radial deviation, warping and local debonding under the action of instantaneous high pressure difference and repeated pressure pulsation, and it is ensured that the sealing binding face is kept stable all the time. The structural strength and rigidity of the whole base are improved, a stable installation foundation is provided for a connecting structure and a sealing element, the situation that a sealing gap is generated due to stress deformation of the base in long-term continuous work is avoided, and the stability of the sealing structure is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of power tool technology, and in particular to an electric suction cup. Background Technology

[0002] An electric vacuum gripper is a gripping device that uses an electrically driven vacuum system to achieve object adsorption, handling, and fixation through negative pressure. A built-in electric vacuum pump quickly extracts air from the suction cup cavity, creating a stable negative pressure zone. The atmospheric pressure difference allows the suction cup to adhere tightly to the object's surface, generating reliable adsorption force. After power is cut off / pressure is released, the pressure returns to normal, completing the release process. It is widely used for handling, installing, hoisting, and fixing heavy objects such as glass, stone, tiles, metal sheets, furniture, home appliances, and curtain wall panels. It is a universal gripping device in decoration, construction, manufacturing, and logistics scenarios.

[0003] CN119878819A discloses a sealing structure element and an electric suction cup. The sealing structure element includes an annular sealing structure, with two end faces connected by through holes, and a groove formed on one end face communicating with the through holes.

[0004] CN120363238A discloses a suction cup sealing structure and a smart suction cup. The suction cup sealing structure includes an annular sealing portion. The outer circumferential edge of the annular sealing portion protrudes to one side to form a first flange portion. The inner circumferential edge of the annular sealing portion forms a second flange portion on the side in the same direction as the first flange portion. A plurality of through holes are formed on the annular surface between the first flange portion and the second flange portion. An annular raised lip is formed on the side of the through holes facing the first flange portion. A support portion is nested inside the first flange portion.

[0005] Existing electric suction cups are prone to frequent and drastic pressure fluctuations during long-term continuous operation. Under conditions such as negative pressure establishment and release, load switching, and sudden changes in operating conditions, the internal pressure undergoes rapid and drastic changes, resulting in repeated pressure pulsations and instantaneous pressure peaks. This unsteady stress environment continuously acts on the sealing components, causing them to gradually displace, deform, and even suffer fatigue damage under alternating stress. This leads to problems such as seal misalignment, warping, wear, and even cracking failure. Once the sealing performance deteriorates, it directly results in insufficient suction force, air leakage, and unstable adsorption, affecting not only the stability and accuracy of equipment operation but also significantly increasing downtime for maintenance and repair, severely reducing the overall reliability and service life of the equipment. Summary of the Invention

[0006] Long-term practical experience has revealed that the sealing structures of existing electric suction cups mostly employ conventional elastic seals and simple bonding designs, which have inherent deficiencies in structural form, constraint methods, and stress matching. Under conditions of long-term continuous operation and rapid pressure fluctuations, the sealing components lack sufficient structural stability and limiting protection. On the one hand, the seals mostly rely on their own elasticity to achieve bonding, without reliable radial and axial limiting structures. Under instantaneous high pressure differentials and repeated pressure pulsations, the sealing edges are prone to radial displacement, warping, and localized detachment, failing to maintain a stable sealing surface. On the other hand, the sealing structure has not been fatigue-optimized for alternating stresses, resulting in uneven stiffness and thickness distribution of the sealing lip or contact surface. Under frequent impacts, stress concentration can easily occur, leading to wear, plastic deformation, and even cracking after long-term operation, ultimately causing seal failure.

[0007] In view of this, the present invention provides an electric suction cup, including a handle device, a base element, and a sealing element. One end face of the base element is connected to the handle device, and the other end face of the base element is connected to the annular sealing element. A connection structure is provided between the base element and the sealing element, and the connection structure is detachably connected to the base element.

[0008] Preferably, the end face of the connecting structure connected to the base element has an annular first flange structure on its circumferential edge; the first flange structure can be detachably connected to the base element.

[0009] Preferably, the first flange structure can wrap around the four sides of the base element and can be engaged with one end face of the base element by at least one snap-fit ​​structure.

[0010] Preferably, the connecting structure has at least one second flange structure spaced apart, the second flange structure being able to be embedded in the base element to form the connecting structure.

[0011] Preferably, the connecting structure and the base element can be threadedly connected through the first threaded hole to form a limiting structure.

[0012] Preferably, an elastic sealing gasket is fixedly disposed between the connecting structure and the base element.

[0013] Preferably, the end face of the base element facing the sealing element has at least one protruding limiting structure; the end face of the connecting structure away from the base element has a protruding limiting portion, and the sealing element can be bonded or snapped between the side of the protruding limiting structure and the protruding limiting portion.

[0014] Preferably, a base frame is provided inside the base element.

[0015] Preferably, the hardness of the base frame is greater than that of the base element.

[0016] Preferably, the sealing element is made of an elastic material.

[0017] This invention provides an electric suction cup, comprising a handle device, a base element, and a sealing element. One end face of the base element is connected to the handle device, and the other end face of the base element is connected to the annular sealing element. A connecting structure is provided between the base element and the sealing element, and the connecting structure is detachably connected to the base element. Through the design of a first flange structure, snap-fit ​​connection, threaded connection, and protruding limiting structure in the connecting structure, multiple limiting and fixing of the sealing element and the base element are achieved. The first flange structure wraps around the four sides of the base element and engages with the snap-fit, forming a dual constraint in the radial and axial directions. The threaded connection further enhances the fixing reliability through a first threaded hole, preventing radial displacement, warping, and local detachment of the sealing element under instantaneous high pressure differential and repeated pressure pulses, ensuring that the sealing contact surface remains stable. A base skeleton with a hardness greater than that of the base body is provided inside the base element, effectively improving the overall structural strength and rigidity of the base, providing a stable installation foundation for the connecting structure and the sealing element, preventing sealing gaps caused by deformation of the base under stress during long-term continuous operation, and further ensuring the stability of the sealing structure. Attached Figure Description

[0018] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is an exploded view of the structure of an electric suction cup according to one embodiment of the present invention.

[0019] Figure 2 This is a partial cross-sectional view of an electric suction cup according to one embodiment of the present invention.

[0020] Figure 3 This is a cross-sectional view of an electric suction cup according to another preferred embodiment of the present invention.

[0021] Figure 4 This is a cross-sectional view of an electric suction cup component according to another more preferred embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures Detailed Implementation

[0023] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] To address the shortcomings of existing electric suction cups, which often employ conventional elastic seals and simple bonding designs, the sealing structure suffers from deficiencies in structural form, constraint methods, and stress matching. Under conditions of long-term continuous operation and rapid pressure fluctuations, the sealing assembly lacks sufficient structural stability and limiting protection. On one hand, the seals rely heavily on their own elasticity for bonding, lacking reliable radial and axial limiting structures. Under instantaneous high pressure differentials and repeated pressure pulsations, the sealing edges are prone to radial displacement, warping, and localized detachment, failing to maintain a consistently stable sealing surface. On the other hand, the sealing structure is not fatigue-optimized for alternating stresses, resulting in uneven stiffness and thickness distribution at the sealing lip or contact surface. Frequent impacts can lead to stress concentration, causing wear, plastic deformation, and even cracking after long-term operation, ultimately resulting in seal failure. This invention proposes an electric suction cup, such as... Figure 1-4 As shown, the electric suction cup includes: a handle device 1, a base element 2, and a sealing element 5. One end face of the base element 2 is connected to the handle device 1, and the other end face of the base element 2 is connected to the annular sealing element 5. A connecting structure 4 is provided between the base element 2 and the sealing element 5, and the connecting structure 4 is detachably connected to the base element 2.

[0025] This invention provides an electric suction cup that achieves multiple limiting and fixing of the sealing element and the base element through the design of a first flange structure, snap-fit ​​connection, threaded connection, and protruding limiting structure in the connecting structure. The first flange structure wraps around the four sides of the base element and engages with the snap-fit, forming a dual constraint in the radial and axial directions. The threaded connection further enhances the fixing reliability through the first threaded hole, preventing radial displacement, warping, and local detachment of the seal under instantaneous high pressure differential and repeated pressure pulses, ensuring that the sealing surface remains stable at all times. The base element has a base skeleton with a hardness greater than that of the base body, which effectively improves the overall structural strength and rigidity of the base, providing a stable installation foundation for the connecting structure and the sealing element, preventing the formation of sealing gaps due to deformation of the base under stress during long-term continuous operation, and further ensuring the stability of the sealing structure. To ensure a more secure connection with the base, constraints are applied both axially and radially, facilitating easy disassembly and maintenance. In a more preferred embodiment, the circumferential edge of the end face where the connecting structure 4 connects to the base element 2 is provided with an annular first flange structure 41; the first flange structure 41 is detachably connected to the base element 2. In another preferred embodiment, the base element 2 and the connecting structure 4 are integrally formed, in which case the connecting structure 4 and the base element 2 are non-detachable. The detachable connection between the first flange structure 41 and the base element 2 includes dovetail joints, adhesive bonding, or snap-fit ​​connections. In a more preferred embodiment, if the base element 2 is made of an elastic material, such as engineering rubber, plastic, or a polymer elastomer, the overall structure of the base element is reinforced by an internal base skeleton 6, and the hardness of the connecting structure 4 is greater than that of the base element 2. In yet another preferred embodiment, if the base element 2 is made of a rigid material, such as plastic or metal... The overall structure of the base element does not need to be reinforced by the internal base frame 6, and the hardness of the connecting structure 4 is less than or equal to that of the base element 2.

[0026] To more securely connect the base element 2 and the connecting structure 4, in a more preferred embodiment of the present invention, the first flange structure 41 can wrap around the four sides of the base element 2, thereby limiting and securing the base element 2 in the circumferential direction, effectively restricting the lateral displacement or swaying of the base element 2 relative to the connecting structure 4. It can also be engaged with one end face of the base element 2 via at least one snap-fit ​​structure 43. The snap-fit ​​structure 43 is integrally formed or fixedly connected to the first flange structure 41. The snap-fit ​​structure 43 extends toward one end face of the base element 2 and forms a detachable snap-fit ​​engagement with that end face, thereby limiting the base element 2 in the axial direction and preventing it from detaching from the connecting structure 4 axially. More preferably, the end face of the base element 2 connected to the snap-fit ​​structure 43 is the same as the end face of the base element 2 connected to the handle device 1. The buckle structure 43 can be continuous or discretely distributed along the circumferential side of the base element 2. If it is discretely distributed, it is more preferable to use equal spacing, and generally 4-8 are most suitable.

[0027] To better limit the radial relative displacement between the connecting structure 4 and the base element 2, forming a more reliable connection, this invention effectively restricts the radial and axial relative movement between the connecting structure 4 and the base element 2, improving the stability and reliability of the connection. In a more preferred embodiment, the connecting structure 4 has at least one spaced second flange structure 42, which can be embedded into the base element 2 to form the connecting structure. The second flange structure 42 can be embedded into the base element 2 in the form of a dovetail groove. To ensure positioning effect and structural strength while also considering manufacturability and assembly convenience, in a more preferred embodiment, the second flange structures 42 are arranged in parallel at equal intervals. Generally, 1-4 are most suitable.

[0028] To improve the stability and reliability of the overall connection structure, such as Figure 4 As shown, in another more preferred embodiment of the present invention, the connecting structure 4 and the base element 2 can be threadedly connected through the first threaded hole 7 to form a limiting structure. The first threaded hole 7 penetrates the base element 2 from top to bottom, but does not penetrate the connecting structure 4. If the connecting structure 4 and the base element 2 are limited to radial relative displacement and only maintain axial unidirectional relative displacement through a threaded connection, then the head diameter of the screw or bolt is larger than the hole diameter of the base element 2. The threaded connection between the connecting structure 4 and the base element 2 further enhances the limiting effect. Specifically, first threaded holes 7 are respectively provided at corresponding positions on the connecting structure 4 and the base element 2. By inserting and tightening threaded fasteners adapted to the first threaded holes 7, the connecting structure 4 and the base element 2 form a stable threaded connection, thereby forming a reliable limiting in the radial direction. When the electric suction cup starts working, the sealing element 5 begins to compress and deform. After being compressed to a certain extent, the elastic sealing gasket 3 can begin to compress further, allowing the threaded fastener in the first threaded hole 7 and the base element 2 to move circumferentially relative to each other. When the electric suction cup stops working, the sealing element 5 returns to its original shape, and the threaded fastener in the first threaded hole 7 moves downward with the connecting structure 4, restoring a stable connection with the base element 2, thus forming a unidirectional movement constraint. This effectively prevents relative rotation or movement between the two, further improving the stability and reliability of the overall connection structure. More preferably, the second threaded hole 71 is used to connect the protruding limiting structure 21 and the base element 2. Alternatively, the base element 2 and the protruding limiting structure 21 can be integrally formed, in which case a threaded connection is not required.

[0029] To further improve the sealing, stability, and assembly reliability of the overall connection, in a more preferred embodiment of the present invention, an elastic sealing gasket 3 is fixedly disposed between the connecting structure 4 and the base element 2. The elastic sealing gasket 3 is clamped and pressed between the mating end faces of the connecting structure 4 and the base element 2, which on the one hand fills the gap between the mating surfaces, providing sealing, vibration damping, and cushioning; on the other hand, it can further enhance suction force through its own elastic deformation and reduce the loose gap between the connecting structure 4 and the base element 2.

[0030] To further limit the circumferential positioning of the sealing element 5 and prevent it from rotating, shifting, or deviating during use, in a more preferred embodiment, the base element 2 has at least one protruding limiting structure 21 formed on its end face facing the sealing element 5; the connecting structure 4 has a protruding limiting portion 44 formed on its end face away from the base element 2, and the sealing element 5 can be adhered to or snapped between the side of the protruding limiting structure 21 and the protruding limiting portion 44. More preferably, the base element 2 has at least one protruding limiting structure 21 formed on its end face facing the sealing element 5, the protruding limiting structure 21 extending integrally from the end face of the base element 2, for initial radial positioning of the sealing element 5. The connecting structure 4 has a protruding limiting portion 44 formed on its end face away from the base element 2, the protruding limiting portion 44 and the protruding limiting structure 21 cooperating to form a limiting space for accommodating and constraining the sealing element 5. The sealing element 5 is made of an elastic material, including foamed rubber, sponge rubber, or ethylene-vinyl acetate copolymer (EVA). The base element 2 can be integrally formed as a continuous, circumferentially annular protruding limiting structure 21, or multiple protruding limiting structures 21 can be discretely fixed along the circumferential direction, with the multiple protruding limiting structures 21 being equidistant. This allows the sealing element 5 to be effectively engaged between the protruding limiting structure 21 and the protruding limiting portion 44. The height of the protruding limiting structure 21 extending relative to the base element 2 is lower than the height of the sealing element 5 extending relative to the base element 2 in its natural state. The height of the protruding limiting portion 44 extending relative to the base element 2 is lower than the height of the sealing element 5 extending relative to the base element 2 in its natural state.

[0031] To enhance the structural strength and overall rigidity of the base element 2 and prevent deformation, warping, or breakage during stress or long-term use, in a more preferred embodiment of the present invention, a base frame 6 is provided within the base element 2. In a more preferred embodiment, the hardness of the base frame 6 is greater than that of the base element 2. This allows it to provide reliable internal support and reinforcement for the base element 2, significantly improving its overall rigidity and load-bearing capacity while ensuring a certain degree of assembly adaptability, thus ensuring the overall structural stability and reliability.

[0032] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric suction cup, characterized in that, The electric suction cup includes: a handle device (1), a base element (2), and a sealing element (5). One end face of the base element (2) is connected to the handle device (1), and the other end face of the base element (2) is connected to the annular sealing element (5). A connecting structure (4) is provided between the base element (2) and the sealing element (5), and the connecting structure (4) is detachably connected to the base element (2).

2. The electric suction cup according to claim 1, characterized in that, The end face of the connecting structure (4) connected to the base element (2) is provided with an annular first flange structure (41); the first flange structure (41) can be detachably connected to the base element (2).

3. The electric suction cup according to claim 2, characterized in that, The first flange structure (41) can wrap around the four sides of the base element (2) and can be engaged with one end face of the base element (2) by at least one snap-fit ​​structure (43).

4. The electric suction cup according to claim 2, characterized in that, The connecting structure (4) has at least one second flange structure (42) spaced apart, and the second flange structure (42) can be embedded in the base element (2) to form a connecting structure.

5. The electric suction cup according to claim 1, characterized in that, The connecting structure (4) and the base element (2) can be threaded together through the first threaded hole (7) to form a limiting structure.

6. The electric suction cup according to claim 1, characterized in that, An elastic sealing gasket (3) is fixedly provided between the connecting structure (4) and the base element (2).

7. The electric suction cup according to claim 1, characterized in that, The base element (2) has at least one protruding limiting structure (21) on its end face facing the sealing element (5); the connecting structure (4) has a protruding limiting portion (44) on its end face away from the base element (2), and the sealing element (5) can be bonded or snapped between the side of the protruding limiting structure (21) and the protruding limiting portion (44).

8. The electric suction cup according to claim 1, characterized in that, The base element (2) is provided with a base frame (6).

9. The electric suction cup according to claim 8, characterized in that, The hardness of the base frame (6) is greater than that of the base element (2).

10. The electric suction cup according to any one of claims 1-9, characterized in that, The sealing element (5) is made of an elastic material.

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