A three-axis high-precision electromagnetic force testing device for relays

Abstract

The present application relates to the mechanical technical field, and discloses a three-axial high-precision relay electromagnetic suction force testing device, which comprises a bottom plate as a whole installation base, the bottom plate is connected with a rotating disc assembly through an XY shaft sliding table, and a table stand for installing a dynamometer is arranged on the rotating disc assembly; the bottom plate is connected with a sliding block through a guide baffle, and a guide column is arranged on the sliding block; a support frame and a hanging plate are sequentially sleeved on the guide column, and a positioning block for accommodating a relay magnetic circuit part is arranged on the support frame.The present application can complete the test of the electromagnetic suction force curve under the premise that the displacement precision is 0.01mm and the instantaneous force and displacement mutation of the relay armature opening are completely avoided, and the authenticity of the electromagnetic suction force curve is ensured, which is closer to the actual situation and can guide the actual situation.

Description

Technical Field

[0001] This invention relates to the field of mechanical technology. Background Technology

[0002] The electromagnetic attraction curve is a key parameter that needs to be controlled in the design and production of electromagnetic relays. Accurately testing the electromagnetic attraction curve of a relay is essential to verify the correctness of its design and is also a necessary prerequisite for improving relay production levels and achieving future relays that do not require calibration.

[0003] Although there are currently similar methods for testing electromagnetic attraction curves using sensors, the electromagnetic attraction force changes abruptly from a large value to a small value the instant the relay armature disconnects. During this process, the armature's stroke changes significantly, and the sensor's response speed cannot meet the displacement test requirements of this process. Therefore, it cannot accurately represent the relay's attraction force curve and requires fitting to complete the test. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a triaxial high-precision relay electromagnetic attraction force testing device, comprising a base plate serving as an integral mounting base. The base plate is connected to a turntable assembly via an XY-axis slide table, and the turntable assembly is equipped with a holder for mounting a force gauge. The base plate is connected to a slider via a guide baffle, and the slider is equipped with a guide post. A support frame and a hanging plate are sequentially sleeved on the guide post. The support frame is equipped with a positioning block for accommodating the relay magnetic circuit portion. The positioning block is equipped with a pressure plate for pressing the magnetic circuit portion and a lead wire pressing system for contacting and fixing the relay coil leads. The pressure plate is equipped with a pressure rod for contacting the armature. The support frame is also equipped with a micrometer knob, which works in conjunction with the pressure rod. A spring is provided between the pressure plate and the positioning block, and a support plate is provided between the pressure plate and the pressure rod.

[0005] The XY axis slide is used to drive the force gauge to move in the X and Y axis directions, and the micrometer knob is used to drive the pressure rod to move up and down to control the armature opening gap.

[0006] The turntable assembly is rotatably connected to the XY axis slide, and the slider is slidably connected to the guide baffle.

[0007] The mounting plate moves up and down on the guide post. An adjusting screw is provided on the mounting plate. The adjusting screw is threaded with the support frame and is used to adjust the up and down position of the support frame. The pressure plate and the positioning block are rotatably connected. The XY axis slide is fixed to the base plate by pin three and internal hexagon screw five.

[0008] The guide baffle is provided with a guide rail, and the slider is slidably connected to the guide rail; the base plate is also provided with multiple pins at the front end of the guide rail to prevent the slider from exceeding the sliding range; the guide baffle is also provided with a base plate and an internal hex screw, the slider is releasably connected to the guide baffle by tightening the screw, and the mounting plate is releasably connected to the guide post by the internal hex screw.

[0009] The turntable assembly includes a mounting plate and a positioning frame mounted on the mounting plate. The mounting plate is connected to the XY axis slide via a second hexagonal screw, and the positioning frame is connected to the mounting plate via a fourth hexagonal screw. A shaft is connected to the mounting plate via a first hexagonal screw, and the shaft is connected to the turntable via a bearing. The turntable is connected to the dial holder via a first hexagonal screw. A drive wheel is engaged on the turntable, and the drive wheel is connected to a rotating handle via a bushing and a second pin. A sliding block is provided on the rotating handle, and the drive wheel is located inside the sliding block, which is housed within the positioning frame. A cover plate for preventing the sliding block from falling off is connected to the top of the positioning frame via a third hexagonal screw and a second spring. An adjusting screw is provided on the side wall of the positioning frame, and the adjusting screw works in conjunction with the sliding block.

[0010] The turntable is rotatably connected to the shaft via bearings. A rotating handle is used to drive the turntable to rotate. A pad is provided between the positioning frame and the mounting plate. Adjusting screws are used to adjust the front and rear positions of the sliding block.

[0011] The pressure plate is hinged to the support frame by a pin, the support plate is set on the pressure plate by an internal hex screw, and the pressure rod is set on the support plate.

[0012] The lead wire pressing system includes a pressing rod, which is connected to a positioning block via a nut, a hexagonal nut, and a spring.

[0013] The frame is equipped with multiple tightening screws for fixing the force gauge.

[0014] Compared with the prior art, this invention achieves the testing of electromagnetic attraction curves with a displacement accuracy of 0.01mm and completely avoids sudden changes in force and displacement at the moment the relay armature opens, ensuring the authenticity of the electromagnetic attraction curves, making them closer to reality and providing practical guidance; it can measure the attraction force of the electromagnetic relay armature under different opening gaps in the energized state while fixing and positioning the relay, according to requirements.

[0015] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the force gauge clamping structure in the embodiment; Figure 3 This is a schematic diagram of the magnetic circuit assembly structure in the embodiment; Figure 4 This is a schematic diagram of the test in the embodiment; Figure 5 This is a diagram of the measured electromagnetic attraction force of the magnetic circuit in the embodiment.

[0018] In the diagram: 1-Guide post, 2-Support frame, 3-Positioning block, 4-Pin 1, 5-Pressure rod, 6-Nut, 7-Hex nut, 8-Spring 1, 9-Pressing rod, 10-Socket headstock screw 1, 11-Meter holder, 12-Socket headstock screw 2, 13-Rotating handle, 14-Socket headstock screw 3, 15-Sliding block, 16-Spring 2, 17-Cover plate, 18-Positioning frame, 19-Adjusting screw, 20-Socket headstock screw 4, 21-Pad, 22-Turntable, 2 3-Sleeve, 24-Drive wheel, 25-Pin 2, 26-Base plate, 27-XY axis slide, 28-Mounting plate, 29-Pin 3, 30-Hex socket head cap screw 5, 31-Shaft, 32-Bearing, 33-Pin 4, 34-Slider, 35-Guide baffle, 36-Tightening screw, 37-Adjusting screw, 38-Hex socket head cap screw 6, 39-Hanging plate, 40-Micrometer knob, 41-Spring 3, 42-Pressure plate, 43-Support plate, 44-Hex socket head cap screw 7. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the embodiments of this invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details are presented in the embodiments of this invention to facilitate a better understanding of this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various variations and modifications based on the following embodiments. The division of the following embodiments is for ease of description and should not constitute any limitation on the specific implementation of this invention. The embodiments can be combined with and referenced by each other without contradiction.

[0020] Example 1 like Figures 1-4The device shown is a triaxial high-precision relay electromagnetic attraction tester. The XY axis slide 27 is mounted on the base plate 26 by hexagon socket head cap screws 30 and pins 29. The mounting plate 28 is fixed to the XY axis slide 27 by four hexagon socket head cap screws 12. The shaft 31 is fixed to the mounting plate 28 by hexagon socket head cap screws 10 and is connected to the turntable 22 by bearings 32. The gauge holder 11 is fixed to the turntable 22 by hexagon socket head cap screws 10, so that the turntable 22 can drive the gauge holder 11 to rotate together. The gauge holder 11 is equipped with three tightening screws 36 for fixing the force gauge. The pad 21 and the positioning frame 18 are fixed to the mounting plate by hexagonal screws 20. The rotating handle 13 is assembled with the drive wheel 24 by the sleeve 23 and pin 25, and then fixed with the sliding block 15 to form a rotating device. This rotating device is built into the positioning frame 18. The cover plate 17 is fixed above the positioning frame 18 by hexagonal screws 14 and spring 16 to prevent the rotating device from falling off. The rotating device moves back and forth in the positioning frame 18 by adjusting screw 19. The XY axis slide 27 is a standard part with a built-in micrometer knob, which can be used to achieve precise movement of the X and Y axes.

[0021] Furthermore, the guide baffle 35 is mounted on the base plate 26 by hexagonal screws 38. The slider 34 is built into the guide rail of the guide baffle 35 and can move back and forth on the guide rail. It can be fixed to the guide baffle 35 by tightening screws 36. Two pins 33 are added to the front end of the guide rail of the guide baffle 35 and embedded in the base plate 26. The pins 33 prevent the slider 34 from sliding and prevent the slider 34 from exceeding the guide rail. The guide post 1 is assembled with the slider 34, and the hanging plate 39 is fitted with the guide post 1. The hanging plate 39 can move up and down automatically on the guide post 1. The hanging plate 39 can be fixed to the guide post 1 by hexagonal screws 14. The adjusting screw 37 is embedded in the hanging plate 39 and is screwed together with the support frame 2, which has the function of adjusting the up and down movement of the support frame 2. The support frame 2 is fitted together with the guide post 1 and fixed to the positioning block 3 by hexagonal screws 10. The wire clamping system, consisting of clamping rod 9, nut 6, hexagonal nut 7, and spring 8, is embedded in positioning block 3. Clamping plate 42 is embedded in positioning block 3 via spring 3 41 and hexagonal screw 2 12. Pin 4 passes through support frame 2 and clamping plate 42, allowing clamping plate 42 to move up and down around pin 4. Support plate 43 is fixed to clamping plate 42 via hexagonal screw 7 44. Clamping rod 5 is embedded in support plate 43. Micrometer knob 40 is embedded in support frame 2, allowing clamping rod 5 to move up and down and be limited via micrometer knob 40.

[0022] The usage process of this invention is as follows: The force gauge is installed in the holder 11 and fixed by tightening screw 36. Then, the magnetic circuit part of the relay to be measured is installed in the positioning block 3 and fixed by the pressure plate 42. The magnetic circuit part is fixed in the required position by moving the slider 34 and adjusting the screw 37. The lead wire of the magnetic circuit part is made into contact by the lead wire clamping system composed of the clamping rod 9, nut 6, hexagonal nut 7, and spring 8. An external power supply is applied to the nut 6, and the product pull-in voltage is applied so that the armature pole surface and the yoke pole surface are completely in contact. Adjust the micrometer knob 40 so that the positioning surface of the pressure rod 5 coincides with the armature surface when the armature pole surface and the yoke pole surface are completely flat. At this time, the positioning surface of the pressure rod 5 falls on the fixed point on the armature surface and is on a straight line parallel to the armature rotation axis. The micrometer's smallest graduation is 0.01mm. Adjusting the micrometer knob 40 depresses the lever 5, which in turn depresses the armature. Based on the lever principle, the distance at the armature's tail magnetic shield point from the yoke pole surface can be calculated for every 0.01mm the armature moves closer to the yoke pole surface from the fixed point. This distance represents the working air gap of the armature in this state. Keeping the working air gap constant, the force gauge in the holder 11 is used to move the probe of the force gauge to the position of the armature head to be measured via the XY-axis slide 27. Adjusting the handle 13 rotates the force gauge. Reading the value when the armature leaves the equilibrium position yields the electromagnetic attraction force under the corresponding working air gap. Continuing to adjust the micrometer knob 40 allows for the measurement of the electromagnetic attraction force under different working air gaps. Based on this series of data, an armature stroke-electromagnetic attraction force curve can be plotted. Figure 5 As shown.

[0023] Since this invention uses screw locking, the torque is not very large, so no special braking mechanism is needed when replacing the relay; the relay can be installed and removed manually.

[0024] Those skilled in the art will understand that the above embodiments can be modified in form and detail in practical applications without departing from the spirit and scope of the invention.

Claims

1. A triaxial high-precision relay electromagnetic attraction force testing device, characterized in that: The system includes a base plate (26) serving as the overall mounting base, which is connected to a turntable assembly via an XY-axis slide (27). The turntable assembly is equipped with a mounting bracket (11) for a force gauge. The base plate (26) is connected to a slider (34) via a guide baffle (35), and the slider (34) is equipped with a guide post (1). A support frame (2) and a hanging plate (39) are sequentially fitted onto the guide post (1). The support frame (2) is equipped with a positioning block (3) for accommodating the magnetic circuit part of the relay. The positioning block (3) is provided with a pressure plate (42) for pressing the magnetic circuit part and a lead wire pressing system for contacting and fixing the relay coil lead wire. The pressure plate (42) is provided with a pressure rod (5) for contacting the armature. The support frame (2) is also provided with a micrometer knob (40), which works in conjunction with the pressure rod (5). A spring three (41) is provided between the pressure plate (42) and the positioning block (3), and a support plate (43) is provided between the pressure plate (42) and the pressure rod (5).

2. The triaxial high-precision relay electromagnetic attraction testing device as described in claim 1, characterized in that: The XY axis slide (27) is used to drive the force gauge to move in the X and Y axis directions, and the micrometer knob (40) is used to drive the pressure rod (5) to move up and down to control the armature opening gap.

3. The triaxial high-precision relay electromagnetic attraction testing device as described in claim 1, characterized in that: The turntable assembly is rotatably connected to the XY axis slide (27), and the slider (34) is slidably connected to the guide baffle (35).

4. The triaxial high-precision relay electromagnetic attraction testing device as described in claim 1, characterized in that: The hanging plate (39) moves up and down on the guide post (1). An adjusting screw (37) is provided on the hanging plate (39). The adjusting screw (37) is threadedly engaged with the support frame (2) and is used to adjust the up and down position of the supported frame (2). The pressure plate (42) and the positioning block (3) are rotatably connected. The XY axis slide (27) is fixed on the base plate (26) by pin three (29) and internal hexagon screw five (30).

5. The triaxial high-precision relay electromagnetic attraction testing device as described in claim 1, characterized in that: The guide baffle (35) is provided with a guide rail, and the slider (34) is slidably connected to the guide rail; the base plate (26) is also provided with multiple pins (33) at the front end of the guide rail to prevent the slider (34) from exceeding the sliding range; the guide baffle (35) is also provided with a base plate (26) and an internal hexagon screw (38), the slider (34) is releasably connected to the guide baffle (35) by tightening the screw (36), and the hanging plate (39) is releasably connected to the guide post (1) by the internal hexagon screw (38).

6. The triaxial high-precision relay electromagnetic attraction testing device as described in claim 1, characterized in that: The turntable assembly includes a mounting plate (28) and a positioning frame (18) on the mounting plate (28). The mounting plate (28) is connected to the XY axis slide (27) by a second hexagonal screw (12), and the positioning frame (18) is connected to the mounting plate (28) by a fourth hexagonal screw (20). A shaft (31) is connected to the mounting plate (28) by a first hexagonal screw (10), and the shaft (31) is connected to a turntable (22) by a bearing (32). The turntable (22) is connected to the table frame (11) by a first hexagonal screw (10). A drive wheel is engaged on the turntable (22). (24) The drive wheel (24) is connected to the rotating handle (13) through the bushing (23) and pin (25); the rotating handle (13) is provided with a sliding block (15), the drive wheel (24) is located in the sliding block (15), and the sliding block (15) is built into the positioning frame (18); the top of the positioning frame (18) is connected to a cover plate (17) to prevent the sliding block (15) from falling off through the internal hexagon screw (14) and spring (16), and the side wall of the positioning frame (18) is provided with an adjusting screw (19), which works in conjunction with the sliding block (15).

7. The triaxial high-precision relay electromagnetic attraction testing device as described in claim 6, characterized in that: The turntable (22) is rotatably connected to the shaft (31) via the bearing (32). The rotating handle (13) is used to drive the turntable (22) to rotate. A pad (21) is provided between the positioning frame (18) and the mounting plate (28). The adjusting screw (19) is used to adjust the front and rear positions of the sliding block (15).

8. The triaxial high-precision relay electromagnetic attraction testing device as described in claim 1, characterized in that: The pressure plate (42) is hinged to the support frame (2) by pin 1 (4), the support plate (43) is set on the pressure plate (42) by hexagonal screw 7 (44), and the pressure rod (5) is set on the support plate (43).

9. The triaxial high-precision relay electromagnetic attraction force testing device as described in claim 1, characterized in that: The lead wire pressing system includes a pressing rod (9), which is connected to the positioning block (3) via a nut (6), a hexagonal nut (7), and a spring (8).

10. The triaxial high-precision relay electromagnetic attraction testing device as described in claim 1, characterized in that: The frame (11) is provided with multiple tightening screws (36) for fixing the force gauge.

Images