Multifunction passive grabbing tooling

Abstract

The application provides a multifunctional passive grabbing tool, which comprises a shell, a grabbing surface is arranged on the bottom surface of the shell, a handle is arranged on the top of the shell, a permanent magnet is movably arranged in the shell, a connecting rod is slidably connected to the shell, one end of the connecting rod is fixedly connected with the permanent magnet, the other end of the connecting rod extends to the outside of the shell and is fixedly connected with a pull rod which is arranged in parallel with the handle, a material returning frame is sleeved to the periphery of the shell, the height of the material returning frame is greater than the height of the shell, a first elastic member is arranged between the material returning frame and the shell, the first elastic member always has a tendency of protruding the bottom surface of the material returning frame relative to the grabbing surface, a locking member is connected to the material returning frame and is used for locking the material returning frame relative to the shell, and cloth-based double-sided adhesive tape is attached to the grabbing surface. Compared with the prior art, the application has the advantages of simple structure, convenient operation and multiple functions, can effectively realize grabbing of all kinds of products, reduces cost investment, effectively avoids product pollution and is suitable for multiple types of harsh production conditions.

Description

Technical Field

[0001] This invention relates to the field of contactless gripping technology, and in particular to a multifunctional passive gripping tool. Background Technology

[0002] Currently, the production of precision electronic components, especially in the manufacture of electronic transformers and inductors, requires extremely high cleanliness levels. The production environment must be dust-free, and most processes prohibit direct manual handling of the products. The salt in the sweat from operators' hands can easily contaminate the product surface, causing corrosion and oxidation of the electroplated layer and solder joints, potentially leading to insulation failure or even complete product damage. Furthermore, in post-soldering processes, the product surface temperature is high, and direct handling poses a risk of burns. The problem of accelerated corrosion due to hand sweat is particularly prominent at high temperatures.

[0003] Currently, the industry mainly uses three types of gripping fixtures for transfer operations: magnetic, adhesive, and vacuum suction cups. However, all types of fixtures have significant structural defects: First, magnetic fixtures can only grip ferromagnetic metal parts, and cannot grip non-ferromagnetic materials such as plastic frames, PCB substrates, resin insulating parts, and films. In the electronic transformer industry, transformer semi-finished products include multiple materials such as magnetic cores (ferromagnetic metals), frames (plastic non-metals), and leads (metal leads, some of which are copper-plated tin), and a single magnetic fixture cannot cover all categories. More seriously, existing magnetic fixtures generally use rigid contact gripping, which can easily cause internal cracks in the magnetic core. Such damage is not visible to the outside and is only exposed during subsequent withstand voltage testing. By then, the costs of the preceding processes have been fully sunk, resulting in batch scrap that is difficult to trace. In addition, some rudimentary magnetic fixtures on the market are made by "sticking magnets to metal strips," which not only lack a material removal mechanism, but also easily cause damage to the product's appearance when forcibly peeled off manually.

[0004] Secondly, although adhesive adsorption fixtures can grip non-metallic workpieces, their adhesive strength is limited, and they are prone to falling off when gripping heavier products. In the transformer soldering process, double-sided tape is easily detached or leaves residue that contaminates the product surface due to high temperatures. When removing the product, manual peeling (i.e., tearing off the material by hand) is required, and the operator's hands will still come into contact with the product, causing secondary contamination. The detached adhesive tends to adhere to the product surface, absorbing more dust and debris at subsequent workstations, resulting in a large number of appearance defects and wasting material and labor costs.

[0005] Third, vacuum suction cup fixtures rely on an external air source, and the pipelines are prone to aging and damage, making them unsuitable for scenarios without an air source or for mobile operations. They cannot create effective negative pressure for breathable membranes and porous plastic parts; thin-walled workpieces are prone to permanent suction marks and deformation during the suction process. At the same time, vacuum suction cup systems have complex structures and high costs, making them difficult to promote and use in small enterprises or manual production lines.

[0006] Fourth, after the various tooling completes the gripping and transfer, the process of removing the product (i.e., unloading) requires manual operation (magnetic suction requires manual peeling, adhesive type requires manual tearing, and vacuum suction cup requires manual removal). The operator's hands will still be in contact with the product, and the effect of "non-contact gripping" in the early stage is negated in the unloading process. The product still faces the risk of sweat contamination and mechanical damage.

[0007] It is evident that existing gripping fixtures are limited in function and material compatibility, failing to meet the gripping requirements of composite materials containing both metals and non-metals in products such as electronic transformers. Furthermore, the entire gripping and unloading process cannot achieve true "handless operation." There is an urgent need for a new type of gripping fixture that requires no external power source, is compatible with multiple materials, and allows for completely contactless gripping and unloading. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a multifunctional passive gripping tool, including a housing, a gripping surface on the bottom surface of the housing, a handle on the top surface of the housing, a permanent magnet movably disposed inside the housing, a connecting rod slidably connected to the housing, one end of the connecting rod being fixed to the permanent magnet, and the other end of the connecting rod extending to the outside of the housing and being fixed to a pull rod arranged parallel to the handle; A material ejection frame is fitted around the outer periphery of the housing, and the height of the material ejection frame is greater than the height of the housing. A first elastic element is provided between the material ejection frame and the housing, and the first elastic element always tends to make the bottom surface of the material ejection frame protrude relative to the gripping surface. A locking element is connected to the material ejection frame, and the locking element is used to lock the material ejection frame relative to the housing. The gripping surface is bonded with cloth-based double-sided adhesive.

[0009] Furthermore, a second elastic element is connected between the pull rod and the handle, and the second elastic element always tends to bring the permanent magnet closer to the gripping surface.

[0010] Furthermore, the handle has a hollow structure, the connecting rod is slidably disposed inside the handle, the top end of the connecting rod is provided with a mounting post, one end of the second elastic member is sleeved on the mounting post, and the other end of the second elastic member abuts against the inner wall of the handle.

[0011] Furthermore, connecting posts are fixed to both ends of the top surface of the housing, and a limit nut is connected to the top of the connecting post. An clearance hole is provided on the ejector frame for the connecting post to pass through. The first elastic element is sleeved on the connecting post and pressed between the limit nut and the top surface of the ejector frame.

[0012] Furthermore, a limiting frame is rotatably connected to the pull rod, and the limiting frame can be supported between the pull rod and the top surface of the housing, so as to keep the permanent magnet away from the gripping surface.

[0013] Furthermore, the limiting frame is in the shape of a "7", and the middle part of the limiting frame is rotatably connected to the pull rod.

[0014] Furthermore, the housing is manufactured as a single piece using a stainless steel square tube, and safety plugs are sealed and fastened to both ends of the housing.

[0015] Furthermore, the handle is inverted U-shaped.

[0016] Furthermore, adapter brackets are fixed at both ends of the top of the ejector frame.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: First, by setting a movable permanent magnet inside the shell, when the permanent magnet moves to the gripping surface, it can form a large magnetism at the gripping surface, thereby attracting and gripping ferromagnetic metals; during material removal, simply pull the connecting rod to move the permanent magnet away from the gripping surface, thereby weakening or eliminating the magnetism of the gripping surface, thus achieving automatic material removal of the attracted and gripped ferromagnetic metals; Second, cloth-based double-sided adhesive can be adhered to the gripping surface, thereby attracting and gripping non-ferromagnetic metals. After releasing the locking of the material removal frame, the first elastic element will cause the bottom surface of the material removal frame to protrude relative to the gripping surface, thereby pushing the adhered and gripped non-ferromagnetic metals out of the gripping surface, also achieving material removal; Third, for composite material products, cloth-based double-sided adhesive... When the permanent magnet acts simultaneously on the product, it can grasp it. During unloading, the permanent magnet moves away from the grasping surface, and the unloading frame also moves, thus unloading the product. It can be seen that the tooling of the present invention has a multi-functional grasping mode, which can adapt to the grasping of all types of products. Moreover, no manual contact or external power or air source is required during grasping and unloading, thereby solving the technical problems in the prior art. In general, the present invention has the advantages of simple structure, convenient operation and multiple functions. It can effectively grasp all types of products, replace multiple single-function tooling, and reduce cost investment. It also achieves no hand contact with the product during the entire grasping and unloading process, effectively avoiding product contamination. Furthermore, it does not require an external power or air source and can be adapted to various harsh production conditions. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the present invention; Figure 3 This is an exploded view of the present invention.

[0019] The attached figures are labeled as follows: 1-Housing; 1.1-Grip surface; 2-Handle; 3-Permanent magnet; 4-Connecting rod; 5-Pull rod; 6-Unloading frame; 6.1-Allowing hole; 6.2-Adapter bracket; 6.3-Sliding plate; 7-First elastic element; 8-Locking element; 9-Fabric double-sided adhesive; 10-Second elastic element; 11-Mounting post; 12-Connecting post; 13-Limit nut; 14-Limiting frame; 14.1-Limiting plate; 14.2-Toggle lever; 15-Safety plug; 16-Mounting plate. Detailed Implementation

[0020] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0022] like Figures 1 to 3 As shown, the present invention provides a multifunctional passive gripping fixture, including a housing 1, a gripping surface 1.1 on the bottom surface of the housing 1, a handle 2 on the top surface of the housing 1, a permanent magnet 3 movably disposed inside the housing 1, a connecting rod 4 slidably connected to the housing 1, one end of the connecting rod 4 being fixed to the permanent magnet 3, and the other end of the connecting rod 4 extending to the outside of the housing 1 and being fixed to a pull rod 5 arranged parallel to the handle 2; a material ejection frame 6 is sleeved on the outer periphery of the housing 1, the height of the material ejection frame 6 being greater than the height of the housing 1; a first elastic member 7 is provided between the material ejection frame 6 and the housing 1, the first elastic member 7 always having a tendency to make the bottom surface of the material ejection frame 6 protrude relative to the gripping surface 1.1; a locking member 8 is connected to the material ejection frame 6, the locking member 8 being used to lock the material ejection frame 6 relative to the housing 1; and a cloth-based double-sided adhesive 9 is adhered to the gripping surface 1.1. Specifically, a mounting plate 16 is fixed at the bottom of the connecting rod 4. Several permanent magnets 3 are provided on the bottom surface of the mounting plate 16. The several permanent magnets 3 are arranged in a Halbach array to ensure that the side facing the gripping surface 1.1 has strong magnetism. When performing magnetic gripping, it can reliably grip the ferromagnetic metal and avoid accidental drop and damage to the product.

[0023] It is worth mentioning that the cloth-based double-sided tape 9 is an adhesive tape with a fabric (cloth / mesh) base material and double-sided coating. It has the characteristics of strong adhesion, tensile strength, and tear-off without leaving a mark. When using the magnetic gripping function alone, the cloth-based double-sided tape 9 can be easily peeled off without affecting its normal gripping and material return.

[0024] Preferably, the locking element 8 is a bolt or screw. Loosening the locking element 8 allows the ejector frame 6 to slide automatically up and down relative to the housing 1. Combined with the elastic force of the first elastic element 7, automatic ejection is achieved. Specifically, the ejector frame 6 is provided with a sliding piece 6.3, which has a waist-shaped through hole in the vertical direction. One end of the locking element 8 passes through the waist-shaped through hole and the housing 1, and is screwed to the connecting rod 4. The other end of the locking element 8 engages with the stop of the sliding piece 6.3. When using only the tooling's magnetic attraction mode, the locking element 8 locks the ejector frame 6 at the top. At this time, the gripping surface 1.1 protrudes relative to the ejector frame 6, without affecting the normal magnetic attraction of the permanent magnet 3. When using other modes, the locking element 8 is unlocked, and the sliding piece 6.3 slides freely relative to the locking element 8, without affecting normal ejection.

[0025] A second elastic element 10 connects the pull rod 5 and the handle 2. The second elastic element 10 always tends to bring the permanent magnet 3 closer to the gripping surface 1.1. The handle 2 has a hollow structure, and the connecting rod 4 is slidably disposed inside the handle 2. A mounting post 11 is provided at the top of the connecting rod 4. One end of the second elastic element 10 is sleeved on the mounting post 11, and the other end of the second elastic element 10 abuts against the inner wall of the handle 2. The second elastic element 10 is preferably a cylindrical spring.

[0026] Connecting posts 12 are fixed to both ends of the top surface of the housing 1. The top end of the connecting post 12 is connected to a limiting nut 13. The ejector frame 6 has a clearance hole 6.1 for the connecting post 12 to pass through. The first elastic element 7 is sleeved on the connecting post 12 and pressed between the limiting nut 13 and the top surface of the ejector frame 6. The first elastic element 7 is preferably a cylindrical spring.

[0027] A limiting frame 14 is rotatably connected to the pull rod 5. The limiting frame 14 can be supported between the pull rod 5 and the top surface of the housing 1, so that the permanent magnet 3 is away from the gripping surface 1.1. The limiting frame 14 is 7-shaped, and its middle part is rotatably connected to the pull rod 5. Specifically, the limiting frame 14 includes a limiting plate 14.1 and a lever 14.2. There are two limiting plates 14.1, both of which are 7-shaped. The middle part of the limiting plate 14.1 has a through hole that rotatably engages with the pull rod 5. A lever 14.2 is connected to each end of the limiting plate 14.1. Both levers 14.2 are arranged parallel to the pull rod 5. When the upper lever 14.2 is moved, the entire limiting frame 14 rotates relative to the pull rod 5, causing the bottom surface of the limiting plate 14.1 to rotate to the top surface of the housing 1, thus providing support. Simultaneously, the permanent magnet 3 moves away from the gripping surface 1.1. With the support of the limiting plate 14.1, a gap exists between the permanent magnet 3 and the gripping surface 1.1, and the fixture switches to adhesive mode. When the lower lever 14.2 is moved, the entire limiting frame 14 also rotates relative to the pull rod 5, causing the bottom surface of the limiting plate 14.1 to move away from the top surface of the housing 1, releasing the support, and the fixture switches to magnetic attraction mode.

[0028] The housing 1 is manufactured as a single piece using stainless steel square tubing, with safety plugs 15 sealingly fastened to both ends. The safety plugs 15 ensure the internal seal of the housing 1, preventing dust and oil from entering and thus avoiding interference with the internal transmission mechanism and extending the service life of the tooling.

[0029] Preferably, the handle 2 is inverted U-shaped, which makes it easy for people to hold and grip; and both ends of the handle 2 are provided with connecting rods 4 and second elastic elements 10 to ensure force balance.

[0030] The top two ends of the unloading frame 6 are respectively fixed with adapter brackets 6.2. The adapter brackets 6.2 can be quickly connected to the robot or other actuators, which can be compatible with the transformation of manual production lines and fully automated production lines, and has a wider range of applications.

[0031] The working principle of this invention is as follows: When using only the magnetic attraction mode, the ejection frame 6 is slid upward relative to the housing 1 in advance to overcome the elastic force of the first elastic element 7. At the same time, the ejection frame 6 is locked to the housing 1 by the locking element 8. At this time, the gripping surface 1.1 protrudes relative to the ejection frame 6. At this time, the gripping surface 1.1 is not bonded with the cloth double-sided adhesive 9, the limiting frame 14 is not supported on the top surface of the housing 1, and the permanent magnet 3 is close to the inner bottom surface of the housing 1, that is, close to the gripping surface 1.1. At this time, when the gripping surface 1.1 is brought close to the ferromagnetic product, it can be easily attracted. When ejecting, simply pull the pull rod 5 to drive the connecting rod 4 and the permanent magnet 3, so that the permanent magnet 3 moves away from the gripping surface 1.1, so that the magnetism of the gripping surface 1.1 is weakened or eliminated, and the product will automatically detach. After manually releasing the pull rod 5, under the elastic force of the second elastic element 10, the permanent magnet 3 will close to the gripping surface 1.1 again, thereby realizing the gripping and ejection of the ferromagnetic product.

[0032] When using only the adhesive mode, first loosen the locking piece 8 to release the lock on the ejector frame 6. Then, allow the limit frame 14 to rotate and support itself on the top surface of the housing 1, moving the permanent magnet 3 away from the gripping surface 1.1. At this time, the gripping surface 1.1 is bonded with cloth double-sided adhesive 9, and under the action of the first elastic piece 7, the bottom surface of the ejector frame 6 will protrude relative to the gripping surface 1.1. When gripping non-ferromagnetic products, the operator will first pull the lever 5. Under the connection of the locking piece 8, the ejector frame 6 will slide together, causing the cloth double-sided adhesive 9 on the gripping surface 1.1 to protrude relative to the bottom surface of the ejector frame 6. At the same time, the gripping surface 1.1 will move closer to the product, and the cloth double-sided adhesive 9 can firmly bond the product. When ejecting, simply loosen the lever 5. Under the elastic force of the first elastic piece 7, the bottom surface of the ejector frame 6 will push the product, thereby detaching it from the cloth double-sided adhesive 9, thus realizing the gripping and ejection of non-ferromagnetic products.

[0033] When gripping composite material products, the locking piece 8 is released, and the limiting frame 14 is not supported on the top surface of the housing 1. The gripping surface 1.1 is bonded with cloth-based double-sided adhesive 9. When the gripping surface 1.1 approaches the product, magnetic force and adhesive force act on the product simultaneously. When retracting the material, the permanent magnet 3 is moved away from the gripping surface 1.1, and at the same time, the ejection frame 6 pushes the product away from the gripping surface, thereby enabling the gripping and ejection of all types of products.

[0034] In summary, the technical solution of this invention can fully and effectively achieve the above-mentioned objectives. Furthermore, the structure and functional principles of this invention have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this invention, various changes or modifications can be made to the embodiments. Therefore, this invention includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. A multifunctional passive gripping fixture, comprising a housing (1), wherein the bottom surface of the housing (1) is provided with a gripping surface (1.1), the top surface of the housing (1) is provided with a handle (2), and a permanent magnet (3) is movably disposed inside the housing (1), characterized in that: A connecting rod (4) is slidably connected to the housing (1). One end of the connecting rod (4) is fixed to the permanent magnet (3), and the other end of the connecting rod (4) extends to the outside of the housing (1) and is fixed to a pull rod (5) arranged parallel to the handle (2). A ejector frame (6) is sleeved around the outer periphery of the housing (1), and the height of the ejector frame (6) is greater than the height of the housing (1); a first elastic member (7) is provided between the ejector frame (6) and the housing (1), and the first elastic member (7) always tends to make the bottom surface of the ejector frame (6) protrude relative to the gripping surface (1.1); a locking member (8) is connected to the ejector frame (6), and the locking member (8) is used to lock the ejector frame (6) relative to the housing (1); The gripping surface (1.1) is bonded with cloth-based double-sided adhesive (9).

2. The multifunctional passive gripping fixture according to claim 1, characterized in that: A second elastic element (10) is connected between the pull rod (5) and the handle (2), and the second elastic element (10) always tends to bring the permanent magnet (3) closer to the gripping surface (1.1).

3. The multifunctional passive gripping fixture according to claim 2, characterized in that: The handle (2) is a hollow structure. The connecting rod (4) is slidably disposed inside the handle (2). The top end of the connecting rod (4) is provided with a mounting post (11). One end of the second elastic member (10) is sleeved on the mounting post (11), and the other end of the second elastic member (10) abuts against the inner wall of the handle (2).

4. A multifunctional passive gripping fixture according to claim 1, characterized in that: The top surface of the housing (1) is fixed with connecting posts (12) at both ends. The top end of the connecting post (12) is connected with a limiting nut (13). The ejector frame (6) is provided with a clearance hole (6.1) for the connecting post (12) to pass through. The first elastic element (7) is sleeved on the connecting post (12) and pressed between the limiting nut (13) and the top surface of the ejector frame (6).

5. The multifunctional passive gripping fixture according to claim 1, characterized in that: A limiting frame (14) is rotatably connected to the pull rod (5). The limiting frame (14) can be supported between the pull rod (5) and the top surface of the housing (1) so that the permanent magnet (3) is away from the gripping surface (1.1).

6. The multifunctional passive gripping fixture according to claim 5, characterized in that: The limiting frame (14) is 7-shaped, and the middle part of the limiting frame (14) is rotatably connected to the pull rod (5).

7. The multifunctional passive gripping fixture according to claim 1, characterized in that: The housing (1) is manufactured as a single piece using stainless steel square tubing, and safety plugs (15) are sealed and fastened at both ends of the housing (1).

8. The multifunctional passive gripping fixture according to claim 1, characterized in that: The handle (2) is inverted U-shaped.

9. The multifunctional passive gripping fixture according to claim 1, characterized in that: The top two ends of the unloading frame (6) are respectively fixed with a transfer bracket (6.2).

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