A magnetic steel bonding force testing device

Abstract

The utility model relates to a kind of magnetic steel adhesive force testing device, including workbench, tension machine and the rack on workbench, wheel hub to which magnetic steel is pasted is placed on workbench, installation backboard is vertically slidably arranged on rack, and pressure block is connected on installation backboard, tension machine is connected between pressure block, power source that drives installation backboard longitudinal movement is equipped on rack, installation backboard drives pressure block and tension machine to move down, pressure block contacts magnetic steel and continuously presses down to magnetic steel falls off from wheel hub, tension machine shows the pressure value when magnetic steel falls off, obtains the adhesive force of magnetic steel.The utility model passes through the extrusion of pressure block to move down magnetic steel, until magnetic steel falls off from wheel hub, simultaneously by tension machine, just the adhesive force numerical value when magnetic steel falls off is recorded, can accurately measure the adhesive force of various magnetic steel pasting mode on market, accurately judge the strength of magnetic steel adhesive force by numerical value, it is convenient to select the most suitable magnetic steel pasting mode.

Description

Technical Field

[0001] This utility model relates to a magnetic steel adhesion force testing device, belonging to the field of motor testing technology. Background Technology

[0002] Magnets are typically glued to the inner circumference of the motor hub or the inner circumference of the magnetic ring. However, the motor may be subjected to impacts during operation, which can easily cause the magnets to detach, leading to safety accidents. Therefore, the magnets need to be tested for adhesion before the motor leaves the factory. Current tests are all done manually, resulting in low efficiency and inconsistent testing standards. Furthermore, current magnet adhesion force testing devices can only observe whether the magnet detaches under a certain pressure. For example, patent application number "201320594549.9," entitled "Magnet Adhesion Force Testing Device," uses an impact hammer to freely fall and strike the motor casing to observe whether the magnet detaches. The testing process of such devices is not rigorous; the impact point is difficult to predict, and the impact can easily deform the motor casing, rendering it unusable. Additionally, the magnitude of the force exerted on the magnet during the test cannot be determined, nor can the exact adhesion force required for the magnet to detach be determined. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a magnetic steel adhesion force testing device that can accurately measure the magnetic steel adhesion force.

[0004] To achieve this objective, the technical solution adopted by this utility model is: A magnet adhesion force testing device includes a worktable, a tensile testing machine, and a frame located on the worktable. A hub with magnets bonded to it is placed on the worktable. A mounting backplate is longitudinally slidable on the frame, and a pressure block is connected to the mounting backplate. The tensile testing machine is connected to the pressure block. A power source is provided on the frame to drive the mounting backplate to move longitudinally. The mounting backplate drives the pressure block and the tensile testing machine to move downward. The pressure block contacts the magnet and continues to press down until the magnet detaches from the hub. The tensile testing machine displays the pressure value when the magnet detaches, thus obtaining the magnet adhesion force.

[0005] As a further optimization of the above technical solution: the power source includes a throttle and a lead screw. The lead screw is fixed to the back of the mounting back plate by a lead screw bearing fixing block. The lead screw nut sleeved on the lead screw is also fixed to the lead screw bearing fixing block. The top of the lead screw passes through the top of the frame and is fixed to the throttle. Manually rotating the throttle causes the lead screw to rotate, and the lead screw nut drives the lead screw bearing fixing block, the mounting back plate, the tensioning machine, and the pressure block to move up and down.

[0006] As a further optimization of the above technical solution: the tensile testing machine includes a display and a pressure sensor. The display is fixed to the mounting back plate, and a top block is also fixed to the mounting back plate. Both ends of the pressure sensor are provided with bent fixing plates. The two fixing plates are oriented in opposite directions, making the pressure sensor approximately S-shaped. The two fixing plates are threadedly fixed to the top block and the pressure block, respectively. When the pressure block moves down and contacts the magnet, the pressure value is transmitted to the pressure sensor, causing the display to show the real-time pressure. The pressure block continues to move down until the magnet falls off the hub, at which point the display shows the current pressure value, thus obtaining the magnet's adhesion force.

[0007] As a further optimization of the above technical solution: the pressure block includes a fixed column and several protruding abutments located at the bottom of the side of the fixed column. When the pressure block moves down, the abutments come into contact with the magnet and apply pressure to the magnet.

[0008] As a further optimization of the above technical solution: the abutment block is arc-shaped.

[0009] As a further optimization of the above technical solution: there are multiple abutments, and the shapes and / or sizes of the multiple abutments are different.

[0010] As a further optimization of the above technical solution: the top edge of the throttle is provided with a protruding grip sleeve, and the throttle is rotated by gripping the grip sleeve.

[0011] As a further optimization of the above technical solution: the frame includes two vertical plates and a horizontal plate located on top of the two vertical plates. Slide rails are installed on both vertical plates, and sliders are slidably mounted on the slide rails. The mounting back plate is fixed on the sliders. The top of the lead screw passes through the horizontal plate and is fixed to the throttle. The throttle is located above the horizontal plate, and both the lead screw and the throttle can rotate relative to the horizontal plate.

[0012] Compared with existing technologies, this invention uses a downward-moving pressure block to compress the magnet until it detaches from the hub. Simultaneously, a tensile testing machine records the adhesive force at the moment of detachment, allowing for accurate measurement of the adhesive force of various magnet bonding methods on the market. This numerical value accurately determines the strength of the magnet's adhesion, facilitating the selection of the most suitable bonding method. The handle, located at the edge of the throttle, amplifies the torque during force application, increasing the downward pressure of the pressure block and reducing effort. Manual rotation of the throttle allows for reasonable and effective control of the downward speed of the pressure block and the increase in applied pressure. To avoid inaccurate test data due to excessively rapid pressure increases caused by the use of electric power sources such as cylinders or motors, manual adjustment ensures the accuracy of test data. Simultaneously, manual rotation allows for control of force, preventing excessive force from damaging the hub or magnet, ensuring the magnet and hub can continue to be used after testing. The curved outer circumference of the abutment prevents interference with the inner circumference of the hub when the abutment moves downwards. Multiple abutments can also be arbitrarily set, and these abutments can be designed with different shapes and sizes to better adapt to the adhesion force testing needs of magnets of different shapes and sizes. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a three-dimensional structural diagram of the pressure block in this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. For example... Figure 1-2 As shown, a magnet adhesion force testing device includes a workbench 1, a tensile testing machine 3, and a frame 2 located on the workbench 1. A hub 9 with a magnet 8 attached is placed on the workbench 1. A mounting back plate 21 is longitudinally slidably arranged on the frame 2. The tensile testing machine 3 is mounted on the mounting back plate 21, and a pressure block 4 is also connected to the mounting back plate 21. The tensile testing machine 3 and the pressure block 4 are connected. A power source is provided on the frame 2 to drive the mounting back plate 21 to move longitudinally. The mounting back plate 21 drives the pressure block 4 and the tensile testing machine 3 to move downward. The pressure block 4 contacts the magnet 8 and continues to press down until the magnet 8 falls off the hub 9. The tensile testing machine 3 displays the pressure value when the magnet 8 falls off, thus obtaining the magnet adhesion force and completing the test.

[0016] In the above technical solution: the power source includes a throttle 5 and a lead screw 6. The lead screw 6 is fixed to the back of the mounting back plate 21 by a lead screw bearing fixing block 7. The lead screw nut fitted on the lead screw 6 is also fixed to the lead screw bearing fixing block 7. The lead screw nut converts the rotational motion of the lead screw 6 into the longitudinal movement of the lead screw bearing fixing block 7 and the mounting back plate 21. The top of the lead screw 6 passes through the top of the frame 2 and is fixed to the throttle 5. Manually rotating the throttle 5 causes the lead screw 6 to rotate, and the lead screw nut drives the lead screw bearing fixing block 7, the mounting back plate 21, the tensioning machine 3, and the pressure block 4 to move up and down. The top edge of the throttle 5 has a protruding grip 51, which makes it easy to apply force to rotate the throttle 5. The grip 51 is located at the edge of the throttle 5, which can amplify the torque when force is applied, increase the pressure of the pressure block 4 moving downward, and make it more labor-saving. By manually rotating the throttle 5, the downward movement speed of the pressure block 4 and the increase in applied pressure can be reasonably and effectively controlled. This avoids the pressure from increasing too quickly due to the use of electric power sources such as cylinders or motors, which would lead to inaccurate test data. Manual adjustment ensures the accuracy of the test data.

[0017] In the above technical solution: the pressure block 4 includes a fixed post 41 and several protruding abutments 42 located at the bottom side of the fixed post 41. This application has a total of three abutments 42, all of which are arc-shaped. When the pressure block 4 moves down, the abutments 42 come into contact with the magnet 8 and apply pressure to the magnet 8. The arc-shaped outer circumference of the abutment 42 can prevent interference between the abutment 42 and the inner circumference of the hub 9 when it moves down. In actual use, multiple abutments 42 can be arbitrarily set, and the shapes and / or sizes of the multiple abutments 42 are different, so as to better adapt to the bonding force testing requirements of magnets 8 with different shapes and sizes.

[0018] In the above technical solution: the tensile testing machine 3 includes a display 31 and a pressure sensor 32. The display 31 is fixed on the mounting back plate 21, and a top block 33 is also fixed on the mounting back plate 21. Both ends of the pressure sensor 32 are provided with bent fixing plates 321. The two fixing plates 321 are oriented in opposite directions, making the pressure sensor 32 approximately S-shaped. The two fixing plates 321 are respectively threaded to the top block 33 and the fixing post 41. When the pressure block 4 moves down and contacts the magnet 8, the pressure value is transmitted to the pressure sensor 32, thereby causing the display 31 to display the real-time pressure. The pressure block 4 continues to move down until the magnet 8 falls off the hub 9. The display 31 then displays the current pressure value, obtains the magnet adhesion force, and completes the test.

[0019] In the above technical solution: the frame 2 includes two vertical plates 22 and a horizontal plate 23 located at the top of the two vertical plates 22. Each of the two vertical plates 22 is equipped with a slide rail 24, and a slider 25 slides on the slide rail 24. A mounting back plate 21 is fixed to the slider 25. The slider 25 and the slide rail 24 cooperate to guide the up-and-down movement of the mounting back plate 21. The top of the lead screw 6 passes through the horizontal plate 23 and is fixed to the throttle handle 5. The throttle handle 5 is located above the horizontal plate 23, and both the lead screw 6 and the throttle handle 5 can rotate relative to the horizontal plate 23.

[0020] The working process of this utility model is as follows: Place the wheel hub 9 with the magnet 8 attached on the workbench 1, hold the handle 51 and apply force to rotate the handle 5 and the lead screw 6, and move the mounting back plate 21, tensile testing machine 3, and pressure block 4 downward. As the abutment block 42 moves downward, adjust the position of the wheel hub 9 on the workbench 1 so that a certain magnet 8 is exactly below the abutment block 42 and in contact with the bottom surface of the abutment block 42. At this time, hold the wheel hub 9 down to position it; continue to slowly rotate the handle 5 to slowly increase the pressure and apply it to the magnet 8. The pressure value is transmitted to the pressure sensor 32, and the display 31 displays the real-time pressure; the pressure block 4 continues to move downward until the magnet 8 falls off the wheel hub 9. The display 31 displays the current pressure value, and the adhesion force of the magnet 8 is obtained, completing the test.

[0021] This invention uses a downward-moving pressure block 4 to compress the magnet 8 until it detaches from the hub 9. Simultaneously, a tensile testing machine 3 records the adhesive force at the moment of detachment. This allows for accurate measurement of the adhesive force of various magnet bonding methods on the market, enabling precise judgment of the magnet's bonding strength and facilitating the selection of the most suitable bonding method. The handle 51, located at the edge of the throttle 5, amplifies the torque during force application, increasing the downward pressure of the pressure block 4 and reducing effort. Manual rotation of the throttle 5 allows for reasonable and effective control of the downward speed of the pressure block 4 and the increase in applied pressure, preventing excessive force. Using an electric power source such as a cylinder or motor to increase pressure too quickly can lead to inaccurate test data. Manual adjustment ensures the accuracy of the test data. At the same time, manual rotation can control the force and prevent excessive force from damaging the hub 9 or magnet 8, ensuring that the magnet 8 and hub 9 can continue to be used after testing. The outer peripheral surface of the abutment 42 is arc-shaped to avoid interference with the inner peripheral surface of the hub 9 when the abutment 42 moves down. Multiple abutments 42 can also be set arbitrarily. Multiple abutments 42 can be designed with different shapes and sizes to better adapt to the adhesion force testing needs of magnets 8 with different shapes and sizes.

[0022] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should fall within the protection scope of this utility model.

Claims

1. A magnetic steel adhesion force testing device, characterized in that... The system includes a workbench (1), a tensile testing machine (3), and a frame (2) located on the workbench (1). A hub (9) with a magnet (8) attached is placed on the workbench (1). A mounting back plate (21) is longitudinally slidably arranged on the frame (2). A pressure block (4) is connected to the mounting back plate (21). The tensile testing machine (3) is connected to the pressure block (4). The frame (2) is provided with a power source that drives the mounting back plate (21) to move longitudinally. The mounting back plate (21) drives the pressure block (4) and the tensile testing machine (3) to move downward. The pressure block (4) contacts the magnet (8) and continues to press down until the magnet (8) falls off the hub (9). The tensile testing machine (3) displays the pressure value when the magnet (8) falls off, thus obtaining the magnet adhesion force.

2. The magnetic steel adhesion force testing device according to claim 1, characterized in that... The power source includes a throttle (5) and a lead screw (6). The lead screw (6) is fixed to the back of the mounting back plate (21) by a lead screw bearing fixing block (7). The lead screw nut fitted on the lead screw (6) is also fixed to the lead screw bearing fixing block (7). The top of the lead screw (6) passes through the top of the frame (2) and is fixed to the throttle (5). The throttle (5) is manually rotated to make the lead screw (6) rotate. The lead screw nut drives the lead screw bearing fixing block (7), the mounting back plate (21), the tensioning machine (3), and the pressure block (4) to move up and down.

3. The magnetic steel adhesion force testing device according to claim 1, characterized in that... The tensile testing machine (3) includes a display (31) and a pressure sensor (32). The display (31) is fixed on the mounting back plate (21). A top block (33) is also fixed on the mounting back plate (21). Both ends of the pressure sensor (32) are provided with bent fixing plates (321). The two fixing plates (321) are in opposite directions, making the pressure sensor (32) approximately S-shaped. The two fixing plates (321) are respectively threaded to the top block (33) and the pressure block (4). When the pressure block (4) moves down and contacts the magnet (8), the pressure value is transmitted to the pressure sensor (32), so that the display (31) displays the real-time pressure. The pressure block (4) continues to move down until the magnet (8) falls off the hub (9). The display (31) displays the current pressure value and obtains the magnet adhesion force.

4. The magnetic steel adhesion force testing device according to claim 1, characterized in that... The pressure block (4) includes a fixed post (41) and a plurality of protruding abutments (42) located at the bottom of the side of the fixed post (41). When the pressure block (4) moves down, the abutments (42) come into contact with the magnet (8) and apply pressure to the magnet (8).

5. The magnetic steel adhesion force testing device according to claim 4, characterized in that... The abutment (42) is arc-shaped.

6. The magnetic steel adhesion force testing device according to claim 4, characterized in that... The abutment (42) is provided in multiple forms, and the shapes and / or sizes of the multiple abutment (42) are different.

7. The magnetic steel adhesion force testing device according to claim 2, characterized in that... The top edge of the throttle (5) is provided with a protruding handle sleeve (51). Hold the handle sleeve (51) and apply force to rotate the throttle (5).

8. The magnetic steel adhesion force testing device according to claim 2, characterized in that... The frame (2) includes two vertical plates (22) and a horizontal plate (23) located on top of the two vertical plates (22). Slide rails (24) are installed on both vertical plates (22). A slider (25) is slidably provided on the slide rails (24). The mounting back plate (21) is fixed on the slider (25). The top of the lead screw (6) passes through the horizontal plate (23) and is fixed to the throttle (5). The throttle (5) is located above the horizontal plate (23). Both the lead screw (6) and the throttle (5) can rotate relative to the horizontal plate (23).

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