Magnetic attraction mechanism

Abstract

The application provides a magnetic suction mechanism (1) with high universality and capable of sucking products of various sizes, which comprises a vertical frame (2), an upper fixed plate (3) with a first horizontal surface (3a) and a side wall (3b) connected with the frame (2), a lower fixed plate (4) with a second horizontal surface (4a) provided with an opening (4b) in the center, an air cylinder (5) located above the opening (4b) and capable of moving up and down between the first horizontal surface (3a) and the second horizontal surface (4a), a suction head (6) arranged on the lower surface of the lower fixed plate (4), and a magnet (7) arranged at the lower end of the air cylinder (5), characterized in that the suction head (6) is a square frame-shaped component with an internal cavity (6a), a connecting plate (6b) located on the side, and a planar suction plate (6c) located on the bottom, when the air cylinder (5) drives the magnet (7) to reach the lowest position, the magnet (7) generates suction force on the sucked object below the suction plate (6c), and the suction action is realized.

Description

Technical Field

[0001] This invention relates to the field of magnetic attraction devices, and more specifically to a magnetic attraction mechanism. Background Technology

[0002] In the industrial automated production of batteries, image analysis of various battery components is typically required. Therefore, various suction mechanisms are needed to move the battery components, which are the objects to be suctioned, to specific positions on the image analysis device. In such applications, the precision of the transfer position is not particularly stringent, but it is necessary to handle objects of various sizes.

[0003] Traditional product handling technologies mainly include mechanical contour gripping, vacuum adsorption, and magnetic adsorption. Mechanical gripping uses robotic arms or claws to physically grasp products, but this method often requires direct contact with the product surface, leading to excessive contact and potentially causing scratches or deformation to delicate products. On the other hand, vacuum adsorption uses negative pressure to adsorb products, which can reduce mechanical damage, but its adsorption effect is unstable for products made of certain materials or with special shapes.

[0004] Magnetic adsorption is widely used in the handling of metal products due to its non-contact or light-contact characteristics. For example, Patent Document 1 discloses a magnetic object suction and release device, which uses a cylinder to control the up-and-down movement of a magnet to achieve the adsorption and release of magnetic objects. However, when using magnetic adsorption for lightweight items, the uncontrollable permanent magnet force and the resulting air-to-ground adsorption can easily lead to inaccurate positioning, affecting the subsequent assembly or processing accuracy. In addition, existing magnetic adsorption mechanisms have poor versatility. When used with multiple machines, it is necessary to frequently switch between different adsorption heads or clamps, which is cumbersome and inefficient, increasing production costs and equipment maintenance complexity.

[0005] Existing technical documents Patent Document 1: CN106272510B Summary of the Invention

[0006] The technical problem to be solved by the present invention is the surface damage caused by excessive contact between the existing suction mechanism and the product, as well as the defects of low versatility.

[0007] The purpose of this invention is to provide a magnetic picking mechanism that is highly versatile and can be compatible with picking up products of various sizes.

[0008] The magnetic attraction mechanism (1) of the present invention includes an upright frame (2); an upper fixed plate (3) having a first horizontal surface (3a) and a side wall (3b), which is connected to the frame (2) through the side wall (3b); a lower fixed plate (4) having a second horizontal surface (4a), the second horizontal surface (4a) having an opening (4b) in the center; a cylinder (5) located above the opening, which can move up and down between the first horizontal surface (3a) and the second horizontal surface (4a); an adsorption head (6) disposed on the lower surface of the lower fixed plate (4); and a magnetic... Stone (7) is located at the lower end of the cylinder (5); the adsorption head (6) is a square frame-shaped component with an internal cavity (6a), a connecting plate (6b) located on the side, and a flat adsorption plate (6c) located at the bottom. The lower surface of the adsorption plate (6c) has a long groove (6d) and a long pre-pressure spring plate (8) is provided inside. The pre-pressure spring plate (8) is floatingly connected to the lower fixed plate (4). When the adsorption head (6) moves downward and approaches the object to be adsorbed, the pre-pressure spring plate (8) contacts the object to be adsorbed first.

[0009] Preferably, the lower fixing plate (4) has guide holes (4c) on both sides of the opening (4b), and the preload spring plate (8) has equal-height screws (9) on both sides. The preload spring plate (8) can be floated up and down in the guide holes (4c) of the lower fixing plate (4) through the guide shaft (9a) of the equal-height screws (9).

[0010] Furthermore, the upper end of the guide shaft (9a) of the equal height screw (9) has a limiting plate (9b), and the lower end has a return spring (10) wound around its outer periphery.

[0011] Furthermore, through holes (11) are provided in the connecting plates (6b) on both sides of the adsorption head (6) to allow the equal-height screws (9) to pass through. One end of the reset spring (10) abuts against the step portion (11a) on the inner surface of the through hole (11), and the other end abuts against the upper surface of the pre-compression spring plate (8). When the reset spring (10) is relaxed, the pre-compression spring plate (8) is pushed to the lowest position, and its lower surface is lower than the lower surface of the adsorption plate (6c). When the reset spring (10) is compressed, the pre-compression spring plate (8) is embedded in the groove (6d), and its lower surface is flush with the lower surface of the adsorption plate (6c).

[0012] Preferably, a position sensor (12) is provided above the guide hole (4c) of the lower fixing plate (4) to sense the position of the limiting plate (9b) of the equalizing screw (9).

[0013] Preferably, the upper fixing plate (3) and the lower fixing plate (4) are connected by multiple linear bearings (13), and springs (14) are wound around the outer periphery of the linear bearings (13).

[0014] Preferably, a servo motor (15) is provided on the frame (2). Driven by the servo motor (15), the adsorption head (6) can move up and down along the Z-axis of the frame (2) or move left and right along the X-axis of the frame (2).

[0015] Preferably, the cylinder (5) is a dual-shaft cylinder, and the magnet (7) is fixed to the lower end of the cylinder (5) by a magnet fixing member (16) and linked with it.

[0016] Preferably, a Z-axis servo lower limit and a Z-axis servo upper limit are provided on the frame (2).

[0017] Invention Effects This invention avoids surface damage and improves product quality by employing a design where the magnet does not directly contact the product. The pre-compression positioning function of the pre-compression spring plate enables precise adsorption of lightweight items, and lightweight products automatically detach upon separation, making operation more convenient. The planar adsorption plate design of the adsorption head allows for the adsorption of products of various sizes without the need for switching, improving versatility. Furthermore, the magnetic adsorption mechanism of this invention has a compact overall structure, occupying little space. Moreover, the inclusion of a position sensor enables more precise handling, effectively reducing the occurrence of handling damage or missed items. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the overall structure of the magnetic attraction mechanism (1) of the present invention.

[0019] Figure 2 This is a schematic diagram showing the exploded structure of the main parts of the magnetic attraction mechanism (1) of the present invention.

[0020] Figure 3 This is a schematic diagram showing the structure of the main part of the magnetic attraction mechanism (1) of the present invention, (A) front view, (B) side view.

[0021] Figure 4 This is a schematic diagram showing the structure of the adsorption head (6) in the magnetic attraction mechanism (1) of the present invention.

[0022] Figure 5 This is a schematic diagram showing the initial state of the magnetic attraction mechanism (1) of the present invention.

[0023] Figure 6 This is a schematic diagram showing the moving state of the magnetic attraction mechanism (1) of the present invention. Detailed Implementation

[0024] In the industrial automated production of batteries, the requirements for the accuracy of the transfer position are not high when the battery components, which are the objects to be suctioned, are moved to a specific position of the image analysis device. However, it is necessary to adjust the size of various battery components and avoid excessive contact with the battery components to prevent damage.

[0025] The magnetic suction mechanism of the present invention adopts a magnetic adsorption method in which the magnet does not directly contact the object being attracted, which can avoid problems such as damage to mechanical claws and unreliable adsorption by vacuum suction cups, and is especially suitable for the above-mentioned situations.

[0026] The specific form of the magnetic attraction mechanism of the present invention will be described below with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram showing the overall structure of the magnetic attraction mechanism (1) of the present invention. Figure 2 This is an exploded schematic diagram showing the main structure of the magnetic attraction mechanism (1) of the present invention.

[0028] like Figure 1 As shown, the magnetic attraction mechanism (1) of the present invention includes main components such as an upright frame (2), an upper fixing plate (3), a lower fixing plate (4), a cylinder (5), an adsorption head (6), and a magnet (7).

[0029] The frame (2) provides a supporting foundation for the entire mechanism and adopts an upright structural design. The upper fixed plate (3) has a first horizontal surface (3a) and a side wall (3b). The first horizontal surface (3a) is a horizontally set flat plate structure, and the side wall (3b) extends vertically upward from the edge of the first horizontal surface (3a). The first horizontal surface (3a) is connected to the frame (2) through the side wall (3b) to form a stable upper support platform.

[0030] The lower fixing plate (4) has a second horizontal surface (4a). For example... Figure 2 As shown in the exploded structure, the second horizontal plane (4a) has an opening (4b) in the center. This opening (4b) is a square or circular through-hole structure, allowing the cylinder (5) and its accessories to move up and down through this opening. In addition, guide holes (4c) can be provided on both sides of the opening (4b) of the lower fixed plate (4). The guide holes (4c) are cylindrical guide channels used to guide and limit the movement trajectory of the preloaded spring plate (8) described later.

[0031] The cylinder (5) is positioned between the first horizontal plane (3a) and the second horizontal plane (4a), and above the opening (4b). When the cylinder (5) is in operation, it can move up and down between the first horizontal plane (3a) and the second horizontal plane (4a), and its stroke can be adjusted according to actual needs. The cylinder (5) can adopt a dual-axis cylinder structure, and its extension and retraction action is mainly to provide driving force for the movement of the magnet (7) described later.

[0032] The magnet (7) is fixed to the lower end of the cylinder (5) by the magnet fixing part (16). It is made of a strong magnetic material and can generate enough magnetic force to attract ferromagnetic objects. The magnet fixing part (16) ensures a firm connection between the magnet (7) and the cylinder (5) so that the magnet (7) can move synchronously with the cylinder (5).

[0033] The adsorption head (6) is disposed on the lower surface of the lower fixing plate (4) and is a square frame-shaped component, but it is not limited to this and can be any other shape as long as it has an internal cavity (6a). In this embodiment, the adsorption head (6) has an internal cavity (6a), two connecting plates (6b) located on the sides, and an adsorption plate (6c) located at the bottom. The internal cavity (6a) is a hollow rectangular space that provides space for the movement of the magnet (7). The connecting plates (6b) extend upward from the sides of the adsorption plate (6c) and form a fixed connection with the lower fixing plate (4). Figure 2 As shown, the connecting plate (6b) may be provided with a through hole (11) through which the equal-height screw (9) described later can pass.

[0034] The adsorption plate (6c) is located at the bottom of the adsorption head (6) and has a planar structure, which can directly contact the object being adsorbed. When the cylinder (5) drives the magnet (7) to the lowest position, the magnet (7) is located near the upper surface of the adsorption plate (6c) and generates an attractive force on the object being adsorbed below the adsorption plate (6c), thereby realizing the adsorption action.

[0035] The adsorption plate (6c) can be made of metal or non-metal. When the mass of the object being attracted is relatively light, it is preferable that the adsorption plate (6c) is made of metal, such as aluminum, to effectively increase the magnetic attraction.

[0036] The magnetic suction mechanism (1) of the present invention has a planar suction plate (6c) at the bottom of the suction head (6), which can be used to suction a wide range of objects of various sizes without the need for switching, thus improving versatility. In addition, a larger suction head (6) can be designed and replaced as needed to flexibly meet the needs of different sizes of products in different scenarios.

[0037] Furthermore, such as Figure 1 and Figure 2As shown, the lower surface of the adsorption plate (6c) preferably has a long groove (6d) with a long pre-compression spring plate (8) inside.

[0038] The groove (6d) extends along the length of the adsorption plate (6c) and its depth is used to accommodate the pre-compression spring plate (8), so that the pre-compression spring plate (8) can be fully embedded in it under the spring compression state, and achieve flush docking with the lower surface of the adsorption plate (6c).

[0039] The pre-compression spring plate (8) and the lower fixed plate (4) are connected by a floating connection, allowing the pre-compression spring plate (8) to float up and down relative to the lower fixed plate (4) under the action of the spring. For example, in the relaxed state of the spring, its lower surface is slightly lower than the lower surface of the adsorption plate (6c). Therefore, when the adsorption head (6) moves downward and approaches the object to be adsorbed, the pre-compression spring plate (8) first contacts the object to be adsorbed (not shown) located below the adsorption plate (6c). In the compressed state of the spring, the pre-compression spring plate (8) is fully embedded in the groove (6d) and reaches its highest position. At this time, the lower surface of the pre-compression spring plate (8) is flush with the lower surface of the adsorption plate (6c).

[0040] The magnetic suction mechanism (1) of the present invention provides a pre-compression spring plate (8) below the suction head (6) to pre-position and buffer, thereby further protecting the battery components, which are the objects to be suctioned, from excessive contact and damage.

[0041] Figure 3 This is a schematic diagram showing the structure of the main part of the magnetic attraction mechanism (1) of the present invention, (A) front view, (B) side view. Figure 4 This is a schematic diagram showing the structure of the adsorption head (6) in the magnetic attraction mechanism (1) of the present invention.

[0042] Figure 3 A specific example of a floating connection between the preloaded spring plate (8) and the lower fixed plate (4) is given. For example... Figure 3 As shown, the preloaded spring plate (8) is a long strip of plate with equal-height screws (9) on both sides. The equal-height screws (9) have guide shafts (9a), and the upper end of the guide shafts (9a) has a limiting plate (9b). The lower end of the guide shafts (9a) is wrapped with a return spring (10). The preloaded spring plate (8) can be floated up and down in the guide hole (4c) of the lower fixed plate (4) through the guide shafts (9a) of the equal-height screws (9). At this time, the sliding of the guide shafts (9a) in the guide holes (4c) ensures the accuracy and stability of the movement of the preloaded spring plate (8).

[0043] The limiting plate (9b) is located at the upper end of the guide shaft (9a), and its lower end is higher than the second horizontal plane (4a) of the lower fixed plate (4). The radius of the limiting plate (9b) is larger than the radius of the guide hole (4c), which prevents the equalizing screw (9) from coming out of the guide hole (4c). When the preloaded spring plate (8) touches the object being sucked and floats upward and is fully embedded in the groove (6d), the height of the limiting plate (9b) can be detected by the position sensor (12) located near the guide hole (4c).

[0044] like Figure 4 As shown, the inner surface of the through hole (11) is provided with a stepped portion (11a) for supporting and positioning the return spring (10). The return spring (10) is wound around the lower outer periphery of the guide shaft (9a) of the equalizing screw (9), with one end abutting against the stepped portion (11a) on the inner surface of the through hole (11) and the other end abutting against the upper surface of the pre-compression spring plate (8). In the relaxed state of the return spring (10), the pre-compression spring plate (8) is pushed to the lowest position, and its lower surface is lower than the lower surface of the adsorption plate (6c), forming a pre-extended state. In the compressed state of the return spring (10), the pre-compression spring plate (8) is embedded in the groove (6d), and when fully embedded, it reaches the highest position, with its lower surface flush with the lower surface of the adsorption plate (6c), at which time planar adsorption of the adsorbed object can be achieved. Since the adsorption plate (6c) of the adsorption head (6) is a planar shape with a large area, it can handle adsorbed objects of various sizes.

[0045] The magnetic suction mechanism (1) of the present invention, by having a pre-contact function of a pre-compression spring plate (8), can avoid excessive contact with the object being suctioned, reduce damage to the object being suctioned, and effectively improve the accuracy and reliability of the suction operation. In addition, the material removal process is also more gentle and stable. Furthermore, by having a position sensing function of a position sensor, it can ensure that the movement is completed after suction, avoiding the occurrence of missed suction.

[0046] Figure 5 This is a schematic diagram showing the initial state of the magnetic attraction mechanism (1) of the present invention. Figure 6 This is a schematic diagram showing the moving state of the magnetic attraction mechanism (1) of the present invention.

[0047] like Figure 5As shown, the position sensor (12) is located above the guide hole (4c) of the lower fixed plate (4). It can be a photoelectric or magnetic induction sensor to sense the position of the limiting plate (9b) of the equal-height screw (9) and monitor the floating state of the preload spring plate (8) in real time. When the limiting plate (9b) is sensed, it indicates that the preload spring plate (8) has reached the highest position (reset). At this time, the magnet (7) descends to the vicinity of the adsorption plate (6c), so that the adsorbed object is in close contact with the bottom surface (adsorption surface) of the adsorption plate (6c). After the adsorption process is completed, the servo motor can be started to drive the magnetic adsorption mechanism (1) to move to the target position of the next unloading process.

[0048] To better address situations where the thickness of the absorbed material is inconsistent, it is preferable to employ an elastic connection between the upper fixing plate (3) and the lower fixing plate (4). As an example of an elastic connection, such as... Figure 5 As shown, the upper fixed plate (3) and the lower fixed plate (4) are connected by multiple linear bearings (13), and springs (14) are wound around the outer periphery of the linear bearings (13). The linear bearings (13) are precision guiding elements to ensure smooth and accurate relative movement between the upper fixed plate (3) and the lower fixed plate (4). The springs (14) have a certain amount of compression, which can appropriately compensate for the inconsistent thickness of the sucked-up objects in different product batches.

[0049] By adopting an elastic connection between the upper fixed plate (3) and the lower fixed plate (4), the elastic deformation of the magnetic suction mechanism (1) can be increased, further reducing the excessive contact between the suction plate (6c) of the suction head (6) and the object being suctioned. In addition, the spring (14) provides a restoring force for the entire suction head (6) assembly, so that the suction head (6) can automatically return to the initial position after completing the suction action.

[0050] The initial state of the magnetic attraction mechanism (1) is that both the return spring (10) and the spring (14) are relaxed. At this time, the lower surface of the preload spring plate (8) is lower than the lower surface of the adsorption plate (6c) and is in an extended state. Driven by the servo motor (15), the magnetic attraction mechanism (1) in the initial state moves to above the target position in the attraction process.

[0051] like Figure 6 As shown, the servo motor (15) is mounted on the frame (2) and has precise position control capability. Driven by the servo motor (15), the adsorption head (6) can move up and down along the Z-axis of the frame (2) or move left and right along the X-axis of the frame (2), thereby achieving precise positioning in three-dimensional space. In addition, a Z-axis servo lower limit and a Z-axis servo upper limit (not shown) are set on the Z-axis of the frame (2) to limit the vertical movement range of the adsorption head (6), prevent excessive movement from causing equipment damage, and provide safety protection for the control system.

[0052] The working principle of the magnetic suction mechanism (1) of the present invention is as follows: When an object needs to be suctioned, the servo motor (15) drives the suction head (6) to move above the target position of the suction process, and the cylinder (5) begins to extend downward, driving the magnet (7) to move downward. During the process of approaching the object to be suctioned, the pre-compression spring plate (8) first contacts the surface of the object to be suctioned due to its extended state. At this time, the reset spring (10) begins to be compressed, and the pre-compression spring plate (8) gradually embeds into the groove (6d). When the pre-compression spring plate (8) is fully embedded in the groove (6d) and flush with the lower surface of the suction plate (6c), the magnet (7) is close enough to the object to be suctioned, and a strong magnetic attraction force is generated to firmly attract the object to be suctioned. During this period, the position sensor (12) monitors the entire process in real time. When the reset of the pre-compression spring plate (8) is detected (reaching the highest position), the pre-compression is stopped, and the suction action officially begins. After the suction is completed, the servo motor is started to move the position of the magnetic suction mechanism (1) to the specified unloading position. Then, the cylinder (5) drives the magnet (7) to reset upwards, and the pre-compression spring plate (8) pops down under the compression of the reset spring (10), so that the suctioned object is removed from the suction plate (6c), thereby acting as a unloading rod. In addition, the spring (14) assists the entire suction head (6) assembly to reset, forming a complete suction cycle.

[0053] The magnetic attraction mechanism of the present invention has been described above with reference to the accompanying drawings and specific embodiments. However, the present invention is not limited to the specific embodiments described above. Various modifications or changes in elements can be made without departing from the spirit of the present invention, and these modifications or changes in elements are also included within the protection scope of the present invention.

Claims

1. A magnetic attraction mechanism (1), comprising: Upright frame (2); The upper fixing plate (3) has a first horizontal surface (3a) and a side wall (3b), which is connected to the frame (2) through the side wall (3b). The lower fixing plate (4) has a second horizontal surface (4a) with an opening (4b) in the center. The cylinder (5), located above the opening (4b), can move up and down between the first horizontal plane (3a) and the second horizontal plane (4a). The adsorption head (6) is disposed on the lower surface of the lower fixing plate (4), and A magnet (7) is disposed at the lower end of the cylinder (5). Its features are, The adsorption head (6) is a square frame-shaped component with an internal cavity (6a), a connecting plate (6b) located on the side, and a planar adsorption plate (6c) located at the bottom. When the cylinder (5) drives the magnet (7) to the lowest position, the magnet (7) generates an attractive force on the object to be attracted below the adsorption plate (6c), thereby achieving the suction action.

2. The magnetic attraction mechanism (1) according to claim 1, characterized in that, The lower surface of the adsorption plate (6c) has a long groove (6d) and a long pre-compression spring plate (8) is provided inside. The pre-compression spring plate (8) is floatingly connected to the lower fixed plate (4). When the suction head (6) moves downward and approaches the object to be suctioned, the pre-compression spring plate (8) contacts the object to be suctioned first.

3. The magnetic attraction mechanism (1) according to claim 2, characterized in that, The lower fixing plate (4) has guide holes (4c) on both sides of the opening (4b), and the preload spring plate (8) has equal-height screws (9) on both sides. The preload spring plate (8) can be floated up and down in the guide holes (4c) of the lower fixing plate (4) through the guide shaft (9a) of the equal-height screws (9).

4. The magnetic attraction mechanism (1) according to claim 3, characterized in that, The guide shaft (9a) of the equal height screw (9) has a limiting plate (9b) at the upper end and a return spring (10) wrapped around the outer periphery of the lower end.

5. The magnetic attraction mechanism (1) according to claim 4, characterized in that, Through holes (11) are provided in the connecting plates (6b) on both sides of the adsorption head (6) to allow the equalizing screw (9) to pass through. One end of the reset spring (10) abuts against the step portion (11a) on the inner surface of the through hole (11), and the other end abuts against the upper surface of the preload spring plate (8). When the reset spring (10) is relaxed, the preloaded spring plate (8) is pushed to its lowest position, and its lower surface is lower than the lower surface of the adsorption plate (6c); when the reset spring (10) is compressed, the preloaded spring plate (8) is embedded in the groove (6d), and its lower surface is flush with the lower surface of the adsorption plate (6c).

6. The magnetic attraction mechanism (1) according to claim 4, characterized in that, A position sensor (12) is provided above the guide hole (4c) of the lower fixing plate (4) to sense the position of the limiting plate (9b) of the equal height screw (9).

7. The magnetic attraction mechanism (1) according to claim 1 or 2, characterized in that, The upper fixing plate (3) and the lower fixing plate (4) are connected by multiple linear bearings (13), and springs (14) are wound around the outer periphery of the linear bearings (13).

8. The magnetic attraction mechanism (1) according to claim 1 or 2, characterized in that, A servo motor (15) is provided on the frame (2). Driven by the servo motor (15), the adsorption head (6) can move up and down along the Z-axis of the frame (2) or move left and right along the X-axis of the frame (2).

9. The magnetic attraction mechanism (1) according to claim 1 or 2, characterized in that, The cylinder (5) is a dual-shaft cylinder, and the magnet (7) is fixed to the lower end of the cylinder (5) by a magnet fixing piece (16) and is linked with it.

10. The magnetic attraction mechanism (1) according to claim 1 or 2, characterized in that, The frame (2) is equipped with a lower limit Z-axis servo and an upper limit Z-axis servo.

Images