A clamping mechanism for silicon steel sheet of automatic paint brushing machine

Abstract

The utility model relates to the technical field of silicon steel sheet production equipment, and disclose a kind of clamping mechanism of silicon steel sheet for automatic paint brush machine, including cylinder one, the output shaft end portion fixed mounting of cylinder one is equipped with connecting plate, the outer peripheral wall of connecting plate is fixedly installed with cylinder two, the output shaft end portion fixed mounting of cylinder two is equipped with mounting plate, the bottom end surface fixed mounting of mounting plate is equipped with hollow tube, the outer peripheral wall of hollow tube is fixedly installed with multiple suction cups, the suction cup is connected with hollow tube inside, for the silicon steel sheet needing to brush paint sequentially carries out adsorption and clamping operation, the utility model is cooperated by multiple suction cups of hollow tube periphery and air pump negative pressure, only contact top single silicon steel sheet surface when adsorbing, utilize negative pressure to overcome the oil dirt adhesion force between laminated sheet, electrostatic adsorption force and surface adhesion force, so that only single piece is grabbed each time.

Description

Technical Field

[0001] This utility model relates to the technical field of silicon steel sheet production equipment, and in particular to a clamping mechanism for silicon steel sheets used in an automatic painting machine. Background Technology

[0002] Silicon steel sheets are a core component of motor cores. Multiple sheets are stacked to form the core, reducing eddy current losses and ensuring motor efficiency and energy consumption performance. To further improve the insulation, corrosion resistance, and stacking tightness of silicon steel sheets, motor-grade silicon steel sheets undergo automatic painting during production. The clamping mechanism of the automatic painting machine is a key component connecting the silicon steel sheet conveying and painting processes. It must accurately grasp, position, and transfer the silicon steel sheets to ensure stable posture during painting and meet the requirements for paint uniformity and consistency. With the increasing automation of motor manufacturing, higher demands are placed on the grasping accuracy, efficiency, and adaptability of the silicon steel sheet clamping mechanism. The performance of the clamping mechanism directly affects the overall operating quality and capacity of the automatic painting production line.

[0003] Silicon steel sheets used in motors are mostly circular to fit the annular magnetic circuit design of the motor core. These circular silicon steel sheets are usually very thin, and for ease of storage and bulk transport, they are often stacked in groups of dozens to hundreds during production. During the process of gripping the silicon steel sheets and feeding them into the automatic painting machine, due to their extremely thin thickness, adjacent sheets are prone to adhesion due to residual oil from the production process, static electricity, or slight deformation of the thin sheets themselves. Existing gripping mechanisms often directly clamp the stacked silicon steel sheets, which can easily result in two or more sheets being gripped simultaneously in a single gripping operation. This leads to multiple sheets being stacked and entering the painting process, causing some sheets to not fully contact the paint, thus affecting insulation and corrosion resistance.

[0004] Therefore, a clamping mechanism for silicon steel sheets used in an automatic painting machine was designed. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a clamping mechanism for silicon steel sheets used in automatic painting machines. It solves the problem that when the circular thin silicon steel sheets of a motor are often stacked for storage and transportation, they tend to stick together due to oil stains, static electricity, or their own deformation. Existing clamping mechanisms can easily clamp multiple sheets when directly grabbing them, resulting in insufficient surface contact with paint when painting stacked silicon steel sheets.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A clamping mechanism for silicon steel sheets used in an automatic painting machine includes a cylinder one, a connecting plate fixedly mounted on the output shaft end of the cylinder one, a cylinder two fixedly mounted on the outer peripheral wall of the connecting plate, an mounting plate fixedly mounted on the output shaft end of the cylinder two, a hollow tube fixedly mounted on the bottom end face of the mounting plate, and multiple suction cups fixedly mounted on the outer peripheral wall of the hollow tube. The suction cups are connected to the inside of the hollow tube and are used to sequentially adsorb and clamp the silicon steel sheets to be painted.

[0007] Preferably, the plurality of suction cups are distributed at equal intervals along the circumference of the hollow tube, and the number of suction cups is at least two; both the mounting plate and the hollow tube are circular structures, and the axis of the hollow tube is collinear with the axis of the mounting plate.

[0008] Preferably, an air pipe is fixedly installed on the top end face of the mounting plate. One end of the air pipe is connected to the inside of the hollow tube, and the other end is a free end connected to an air pump. The air pump is used to provide negative pressure adsorption force to the suction cup through the air pipe and the hollow tube.

[0009] Preferably, a plurality of mounting strips are fixedly installed on the outer peripheral wall of the cylinder, and the plurality of mounting strips are distributed in an equidistant circular array along the circumference of the cylinder.

[0010] Preferably, the free ends of the plurality of mounting strips away from the cylinder are respectively hinged to a plurality of movable grippers via a hinge shaft, and the middle of the plurality of movable grippers is bent inward, forming an overall L-shaped structure.

[0011] Preferably, the outer walls of the plurality of movable grippers are hinged to the outer wall of the connecting plate via hinge shafts. The hinge shafts are made of stainless steel and their axis is parallel to the axis of the hinge seat of the mounting strip. When the output shaft of cylinder one extends or retracts, the connecting plate rises and falls synchronously, and the movable grippers are driven to rotate around the hinge seat of the mounting strip via the hinge shafts, thereby realizing the opening and closing of the gripping end of the movable grippers.

[0012] Preferably, each of the multiple movable grippers has an anti-slip pad fixedly installed at the gripping end away from the mounting strip. The anti-slip pad is made of rubber and has anti-slip texture on the side of its surface facing the silicon steel sheet.

[0013] Preferably, the hollow tube and the mounting plate are detachably fixedly connected by multiple bolts, which are distributed at equal intervals along the circumference of the mounting plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes multiple suction cups on the outer periphery of a hollow tube in conjunction with the negative pressure of an air pump. During adsorption, only the surface of the topmost single silicon steel sheet is contacted. The negative pressure overcomes the adhesion force of oil stains, electrostatic adsorption force, and surface adhesion force between the stacked sheets, ensuring that only one sheet is grasped at a time. Compared with the traditional method of directly clamping stacked sheets, this avoids the problem of multiple silicon steel sheets entering the painting process at the same time, ensuring that the surface of each silicon steel sheet can fully contact the paint, thus improving the consistency of insulation and corrosion resistance.

[0015] This invention is designed for circular silicon steel sheets of different diameters, especially small-diameter silicon steel sheets. The mechanism dynamically adjusts the vertical height using cylinder two: when the suction cup adsorbs a small-diameter silicon steel sheet, if its outer peripheral wall is higher than the clamping end of the movable gripper, cylinder two can extend and retract a second time to lower the silicon steel sheet to the appropriate height, and then cylinder one drives the gripper to complete the clamping, thus improving the adaptability to silicon steel sheets of various specifications. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall bottom view of the present invention; Figure 3 This is a schematic diagram of the exploded structure of this utility model; Figure 4 This is a partial structural schematic diagram of the present invention.

[0018] Drawing number descriptions: 1. Cylinder 1; 11. Connecting plate; 12. Mounting strip; 13. Movable gripper; 2. Cylinder 2; 21. Mounting plate; 211. Hollow tube; 2111. Suction cup; 3. Air pipe. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings.

[0020] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0021] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0022] It is understood that the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0023] Example 1: Please see Figure 1-4 A clamping mechanism for silicon steel sheets used in an automatic painting machine includes a cylinder 1. A connecting plate 11 is fixedly installed at the end of the output shaft of the cylinder 1. A cylinder 2 is fixedly installed on the outer peripheral wall of the connecting plate 11. An mounting plate 21 is fixedly installed at the end of the output shaft of the cylinder 2. A hollow tube 211 is fixedly installed on the bottom end face of the mounting plate 21. Multiple suction cups 2111 are fixedly installed on the outer peripheral wall of the hollow tube 211. The suction cups 2111 are connected to the inside of the hollow tube 211 and are used to sequentially adsorb and clamp the silicon steel sheets to be painted.

[0024] Multiple suction cups 2111 are distributed at equal intervals along the circumference of the hollow tube 211, and there are at least two suction cups 2111; both the mounting plate 21 and the hollow tube 211 are circular structures, and the axis of the hollow tube 211 is collinear with the axis of the mounting plate 21.

[0025] An air pipe 3 is fixedly installed on the top end face of the mounting plate 21. One end of the air pipe 3 is connected to the inside of the hollow tube 211, and the other end is a free end connected to an air pump. The air pump is used to provide negative pressure adsorption force to the suction cup 2111 through the air pipe 3 and the hollow tube 211.

[0026] Multiple mounting strips 12 are fixedly installed on the outer peripheral wall of cylinder 1, and the multiple mounting strips 12 are distributed in a circumferential array at equal intervals along the circumference of cylinder 1.

[0027] Multiple mounting strips 12 are hinged to the free ends of cylinder 1 via hinge shafts, and multiple movable grippers 13 are respectively mounted. The middle of each movable gripper 13 is bent inward, forming an L-shaped structure.

[0028] The outer walls of multiple movable grippers 13 are hinged to the outer wall of the connecting plate 11 via hinge shafts. The hinge shafts are made of stainless steel and their axis is parallel to the axis of the hinge seat of the mounting strip 12. When the output shaft of cylinder 1 extends or retracts, the connecting plate 11 rises and falls synchronously, driving the movable grippers 13 to rotate around the hinge seat of the mounting strip 12 via the hinge shafts, thereby opening and closing the gripping end of the movable grippers 13.

[0029] Multiple movable grippers 13 are fixedly equipped with anti-slip pads at the gripping ends away from the mounting strip 12. The anti-slip pads are made of rubber and have anti-slip textures on the side of their surface facing the silicon steel sheet.

[0030] The hollow tube 211 is detachably and fixedly connected to the mounting plate 21 by multiple bolts, which are distributed at equal intervals along the circumference of the mounting plate 21.

[0031] During operation, when the device is in the initial state, the output shaft of cylinder 1 is in the extended state, which drives the connecting plate 11 to the low position. At this time, the movable gripper 13, which is hinged to the connecting plate 11, is in the open state under the support of the mounting strip 12, and the gripping end is away from the central axis. The output shaft of cylinder 2 is in the retracted state, which drives the mounting plate 21, hollow tube 211 and suction cup 2111 to a high position, and the suction cup 2111 does not contact the silicon steel sheet. The air pump is in standby mode, and there is no negative pressure inside air pipe 3 and hollow tube 211. A stack of round silicon steel sheets to be painted is placed at the positioning station below the mechanism, with its center aligned with the axis of the hollow tube 211.

[0032] When the output shaft of cylinder 2 extends, it drives the mounting plate 21, hollow tube 211, and multiple suction cups 2111 to move downwards synchronously until the adsorption surface of the suction cups 2111 is in contact with the surface of the top single silicon steel sheet in the stack of silicon steel sheets. The air pump introduces negative pressure into the hollow tube 211 through the air pipe 3. The negative pressure is transmitted to the multiple suction cups 2111 through the hollow tube 211, so that the suction cups 2111 tightly adsorb the top single silicon steel sheet. The negative pressure overcomes the adhesion between the silicon steel sheets, ensuring that only a single sheet is adsorbed. After adsorption is completed, the output shaft of cylinder 2 retracts, driving the mounting plate 21, hollow tube 211, suction cups 2111, and the adsorbed silicon steel sheet to move upwards synchronously, detaching from the stack of silicon steel sheets below. After suction cup 2111 adsorbs the silicon steel sheet, the output shaft of cylinder 2 retracts to a preset height, locking the length of the output shaft. At this time, the vertical height of the silicon steel sheet is fixed. The output shaft of cylinder 1 retracts, driving the connecting plate 11 to move upward. Since the middle part of the movable gripper 13 is hinged to the connecting plate 11 through a hinge shaft, and one end of the movable gripper 13 is hinged to the free end of the mounting strip 12, when the connecting plate 11 moves upward, it will push the movable gripper 13 to rotate inward around the hinge point of the mounting strip 12 through the hinge shaft, so that the clamping end of the movable gripper 13 gradually approaches the outer peripheral wall of the silicon steel sheet. Until the anti-slip pad of the clamping end of the movable gripper 13 is in close contact with the outer peripheral wall of the silicon steel sheet, the mechanical clamping of the silicon steel sheet is completed. The anti-slip texture of the anti-slip pad increases the friction and prevents the silicon steel sheet from slipping during the transfer process. An external drive device moves the entire clamping mechanism, transferring the adsorbed and clamped silicon steel sheet to the painting station of the automatic painting machine.

[0033] In another embodiment, when the outer diameter of the silicon steel sheet to be clamped is small, after the suction cup 2111 adsorbs the silicon steel sheet and rises to the initial preset height, the outer peripheral wall of the silicon steel sheet may be located above the clamping end of the movable gripper 13 due to the overall high position and small diameter of the silicon steel sheet. This causes the movable gripper 13 to be unable to contact the outer peripheral wall of the silicon steel sheet when rotating inward. In this case, the following steps can be used to adjust the situation: After the suction cup 2111 adsorbs the silicon steel sheet and rises to the initial preset height, if it is observed that there is a vertical gap between the clamping end of the movable gripper 13 and the outer peripheral wall of the silicon steel sheet and they cannot make contact, then keep cylinder 1 still and start cylinder 2.

[0034] The output shaft of cylinder 2 extends outward, driving the mounting plate 21, hollow tube 211, suction cup 2111 and the adsorbed silicon steel sheet to move downward synchronously until the outer peripheral wall of the silicon steel sheet is at the same vertical height as the clamping end of the movable gripper 13.

[0035] Cylinder 2 stops operating and locks the output shaft to maintain the current height. Then, cylinder 1 is started: the output shaft of cylinder 1 moves according to the preset stroke, driving the connecting plate 11 to move. Through the hinge shaft, the movable gripper 13 is driven to rotate inward, so that the anti-slip pad at the gripping end is in close contact with the outer peripheral wall of the silicon steel sheet, thus completing the gripping.

[0036] After the active gripper 13 successfully holds the silicon steel sheet, in order to prevent the suction cup 2111 from continuing to adhere and causing excessive force on the silicon steel sheet, which may lead to deformation, it is necessary to release the suction cup 2111. The specific steps are as follows: After the active gripper 13 completes its clamping, the exhaust valve of the air tube 3 is opened, allowing the air tube 3, hollow tube 211, and suction cup 2111 to return to normal pressure.

[0037] When the suction cup 2111 loses its adsorption force, it naturally separates from the surface of the silicon steel sheet. At this time, the silicon steel sheet is held by the movable gripper 13 alone, avoiding stress concentration caused by double fixation. Then, the silicon steel sheet can be moved to the painting station by the external drive device.

[0038] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A clamping mechanism for silicon steel sheets used in an automatic painting machine, characterized in that: The device includes a cylinder (1), a connecting plate (11) is fixedly installed at the output shaft end of the cylinder (1), a cylinder (2) is fixedly installed on the outer peripheral wall of the connecting plate (11), an mounting plate (21) is fixedly installed at the output shaft end of the cylinder (2), a hollow tube (211) is fixedly installed on the bottom end face of the mounting plate (21), and multiple suction cups (2111) are fixedly installed on the outer peripheral wall of the hollow tube (211). The suction cups (2111) are connected to the inside of the hollow tube (211) and are used to sequentially adsorb and clamp the silicon steel sheet that needs to be painted.

2. The clamping mechanism for silicon steel sheets in an automatic painting machine according to claim 1, characterized in that: Multiple suction cups (2111) are distributed at equal intervals along the circumference of the hollow tube (211), and there are at least two suction cups (2111); the mounting plate (21) and the hollow tube (211) are both circular structures, and the axis of the hollow tube (211) is collinear with the axis of the mounting plate (21).

3. The clamping mechanism for silicon steel sheets in an automatic painting machine according to claim 1, characterized in that: An air pipe (3) is fixedly installed on the top end face of the mounting plate (21). One end of the air pipe (3) is connected to the inside of the hollow tube (211), and the other end is a free end connected to an air pump. The air pump is used to provide negative pressure adsorption force to the suction cup (2111) through the air pipe (3) and the hollow tube (211).

4. The clamping mechanism for silicon steel sheets in an automatic painting machine according to claim 1, characterized in that: Multiple mounting strips (12) are fixedly installed on the outer peripheral wall of the cylinder (1), and the multiple mounting strips (12) are distributed in an equidistant circular array along the circumference of the cylinder (1).

5. The clamping mechanism for silicon steel sheets in an automatic painting machine according to claim 4, characterized in that: Multiple movable grippers (13) are respectively hinged to the free ends of the multiple mounting strips (12) away from the cylinder (1) via hinge shafts. The middle of the multiple movable grippers (13) is bent inward, forming an L-shaped structure.

6. The clamping mechanism for silicon steel sheets in an automatic painting machine according to claim 5, characterized in that: The outer walls of the multiple movable grippers (13) are hinged to the outer wall of the connecting plate (11) via hinge shafts. The hinge shafts are made of stainless steel and their axis is parallel to the axis of the hinge seat of the mounting strip (12). When the output shaft of cylinder one (1) extends or retracts, the connecting plate (11) rises and falls synchronously, and the movable grippers (13) are driven to rotate around the hinge seat of the mounting strip (12) via the hinge shafts, thereby realizing the opening and closing of the clamping end of the movable grippers (13).

7. The clamping mechanism for silicon steel sheets in an automatic painting machine according to claim 5, characterized in that: Each of the multiple movable grippers (13) has an anti-slip pad fixedly installed at the gripping end away from the mounting strip (12). The anti-slip pad is made of rubber and has anti-slip texture on the side of its surface facing the silicon steel sheet.

8. The clamping mechanism for silicon steel sheets in an automatic painting machine according to claim 1, characterized in that: The hollow tube (211) and the mounting plate (21) are detachably fixedly connected by multiple bolts, which are distributed at equal intervals along the circumference of the mounting plate (21).

Images