Mechanical detection tool for direct-current relay

Abstract

The utility model discloses a mechanical detection tool for a direct current relay, which comprises a box body, a support frame and a first rotating device are fixed on the top of the box body, a rotating body is connected to the top of the first rotating device, a first lifting device is connected to the support frame, a fixing plate is connected to the first lifting device, and power-on probes are mounted on two sides of the fixing plate. Two detection probes are mounted in the middle of the base; a second lifting mechanism is installed in the box body and connected with a pressure sensor. The pressure sensor is arranged opposite to the first lifting device and faces one end of the rotating body. The device is small in size, can automatically detect the magnetic gap, the contact gap, the over-travel, the return force, the pull-in voltage and the release voltage, saves the detection space and labor, can circularly detect, and improves the detection speed.

Description

Technical Field

[0001] This utility model relates to the field of electrical engineering, and in particular to a mechanical testing fixture for a DC relay used in a shelter. Background Technology

[0002] Currently, the rapid development of new energy vehicles and the widespread adoption of power systems such as photovoltaic energy storage and energy storage modules have led to increasingly higher demands and requirements for DC relays that can quickly switch high-voltage circuits. Key parameters of DC relays, such as pull-in voltage, release voltage, magnetic gap, contact gap, overtravel, and return force, have a crucial impact on the product. Therefore, in mass production, testing the performance of each product and ensuring the traceability of test results becomes particularly important. Currently, industrial testing of DC relays generally falls into two categories: First, manual testing involves using different tooling in three steps to check the pull-in and release voltages; using a thickness gauge to check the magnetic gap and contact gap, then calculating the overtravel; and finally using a pressure gauge to check the return force. This method is time-consuming, labor-intensive, prone to errors, and wastes manpower. Some companies may introduce automated lines, but the essence is still three-step (three-station) testing. Automated lines are extremely costly and require a large area. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model proposes a mechanical testing fixture for DC relays.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A mechanical testing fixture for a DC relay includes a housing, a support frame and a first rotating device fixed to the top of the housing, a rotating body connected to the top of the first rotating device, a first lifting device connected to the support frame, a fixed plate connected to the first lifting device, power-on probes mounted on both sides of the fixed plate, and two testing probes mounted in the middle; a second lifting mechanism is installed inside the housing, a pressure sensor is connected to the second lifting mechanism, and a push rod is connected to the pressure sensor; the pressure sensor is positioned opposite to the first lifting device; a through hole corresponding to the push rod is also formed on the rotating body.

[0006] As a further improvement, a feeding photoelectric device is installed on the rotating body.

[0007] In a further improvement, the first rotating device is a rotary cylinder.

[0008] In a further improvement, the first lifting device is a vertical cylinder, which is connected to a power source through a pressure regulating valve, a pressure gauge and a solenoid valve. The pressure regulating valve is connected to a pressure regulating knob.

[0009] In a further improvement, the second lifting mechanism includes a motor, which is connected to a pressure sensor via a lead screw mechanism.

[0010] As a further improvement, the enclosure is equipped with an LCD screen, a start button, and a power switch.

[0011] As a further improvement, the motion button is now two.

[0012] In a further improvement, the rotating body is disc-shaped.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. Its small size allows for automated detection of magnetic gap and contact gap, overtravel, return force, pull-in voltage and release voltage, saving detection space and manpower.

[0015] 2. It can perform cyclic detection, which improves the detection speed. Attached Figure Description

[0016] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a front structural diagram of the present invention.

[0020] The components include: LCD screen 1, DC relay 2, rotating body 3, through hole 31, support frame 4, pressure gauge 5, pressure regulating knob 6, housing 7, start button 8, power switch 9, solenoid valve 10, pressure regulating valve 11, lead screw mechanism 12, pressure sensor 13, first lifting device 14, fixing plate 141, feeding photoelectric device 15, first rotating device 16, motor 17, power-on probe 18, and detection probe 19. Detailed Implementation

[0021] To make the purpose, technical solution and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and examples.

[0022] like Figure 1 The mechanical testing fixture for a DC relay shown includes a housing 7, a support frame 4 and a first rotating device 16 fixed on the top of the housing 7. The first rotating device 16 is a rotary cylinder, the housing of which is located inside the housing 7 and fixedly connected to the housing 7. The rotating shaft extends out of the housing 7 and is connected to a disc-shaped rotating body 3. Feeding photoelectric sensors 15 are installed at both the front and rear ends of the rotating body 3.

[0023] The first lifting device 14 is connected to a fixed plate 141. Power-on probes 18 are installed on both sides of the fixed plate 141, and two detection probes 19 are installed in the middle.

[0024] A second lifting mechanism is also installed inside the housing 7. The second lifting mechanism is connected to a pressure sensor 13, and the pressure sensor 13 is connected to a push rod 131. The pressure sensor 13 is positioned opposite to the first lifting device 14 and faces the rear end of the rotating body 3. The front and rear ends of the rotating body 3 both form through holes 31 corresponding to the push rod 131. The first lifting device 14 is a vertical cylinder, and the first rotating device 16 is a rotary cylinder. The second lifting mechanism includes a motor 17, which is connected to the pressure sensor 13 via a lead screw mechanism 12.

[0025] The process for using it is as follows:

[0026] Step 1: Place the DC relay 2 on the rotating body 3. After the feeding photoelectric sensor 15 detects that there is a DC relay 2 at the workstation, the first rotating device 16 is activated, driving the rotating body 3 to rotate 180° and reach directly below the first lifting device 14.

[0027] Step 2: The first lifting device 14 presses down, the power-on probe 18 contacts the copper sheet on the DC relay 2, and the detection probe 19 contacts the two leads of the DC relay 2.

[0028] Step 3: Apply a 12V operating voltage directly to the power-on probe 18, and then check whether the detection probe 19 is conducting. If it is not conducting, exit the test, and the DC relay 2 is unqualified.

[0029] Step 4: When the circuit is turned on, the operating voltage is disconnected, and the second lifting mechanism quickly rises to the preset position, then slows down and continues to rise, while simultaneously judging the force value of the pressure sensor 13.

[0030] Step 5: When the force value of the pressure sensor is greater than the preset contact force of 0.5N, the second lifting mechanism descends, and the position S1 when the force value of the pressure sensor 13 is just close to 0 is recorded.

[0031] Step 6: Linearly apply the operating voltage to the power-on probe 18, record the voltage when the detection probe 19 is just turned on, record the pull-in voltage Vs at this time, and maintain the pull-in voltage Vs.

[0032] Step 7: The second lifting mechanism rises, and the position at which the pressure sensor force value reaches the preset contact force of 0.5N is determined and recorded as position S2.

[0033] Step 8: Apply the rated control voltage of 12V to the power probe 18 and detect the force value of the pressure sensor. If the force value disappears, the second lifting mechanism continues to move upward to the position where the force value of the pressure sensor is just greater than 0, and this position is recorded as S3. If the force value does not disappear, no operation is performed. When there is S3, the magnetic gap is the distance between S3 and S1; otherwise, the magnetic gap is the distance between S2 and S1.

[0034] Step 9: Disconnect the control power supply. The second lifting mechanism drives the pressure sensor to move downward. Record the pressure F1 when the detection probe is disconnected, which is the return force. Record the position S4 at this time. If S3 is present, the contact gap is the distance between S3 and S4; otherwise, it is the distance between S2 and S4. The difference between the magnetic gap and the contact gap is the overtravel.

[0035] Step 10: The second lifting mechanism moves back to the origin. The power-on probe 18 continues to apply the pull-in voltage Vs, and then decreases linearly. It is determined whether the detection probe 19 is disconnected. The release voltage Vr when the detection probe 19 is disconnected is recorded, which is the disconnection control voltage.

[0036] Step 11: Test completed. The first lifting device 14 rises, the first rotating device 16 flips, and the tested DC relay 2 is retrieved. Then, the next round of testing is carried out.

[0037] The vertical cylinder is connected to the power source through the pressure regulating valve 11, the pressure gauge 5 and the solenoid valve 10. The pressure regulating valve 11 is connected to the pressure regulating knob 6, which is used to adjust the pressure when the vertical cylinder is pressed down.

[0038] The enclosure 7 is equipped with an LCD screen 1, a start button 8, and a power switch 9.

[0039] There are two start buttons 8 connected in series, so that both buttons will be pressed simultaneously to activate the device and prevent accidental operation. The rotating body 3 is disc-shaped.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the essence and scope of the technical solution of this utility model.

Claims

1. A mechanical testing fixture for a DC relay, characterized in that, The enclosure includes a housing (7), a support frame (4) and a first rotating device (16) fixed on the top of the housing (7), a rotating body (3) connected to the top of the first rotating device (16), a first lifting device (14) connected to the support frame (4), a fixed plate (141) connected to the first lifting device (141), power-on probes (18) installed on both sides of the fixed plate (141), and two detection probes (19) installed in the middle; a second lifting mechanism is installed inside the housing (7), a pressure sensor (13) is connected to the second lifting mechanism, and a push rod (131) is connected to the pressure sensor (13); the pressure sensor (13) is arranged opposite to the first lifting device (14); a through hole (31) corresponding to the push rod (131) is also formed on the rotating body (3).

2. The mechanical testing fixture for a DC relay as described in claim 1, characterized in that, The rotating body (3) is equipped with a feeding photoelectric device (15).

3. The mechanical testing fixture for a DC relay as described in claim 1, characterized in that, The first rotating device (16) is a rotary cylinder.

4. The mechanical testing fixture for a DC relay as described in claim 2, characterized in that, The first lifting device (14) is a vertical cylinder. The vertical cylinder is connected to the power source through a pressure regulating valve (11), a pressure gauge (5) and a solenoid valve (10). The pressure regulating valve (11) is connected to a pressure regulating knob (6).

5. The mechanical testing fixture for a DC relay as described in claim 1, characterized in that, The second lifting mechanism includes a motor (17), which is connected to a pressure sensor (13) via a lead screw mechanism (12).

6. The mechanical testing fixture for a DC relay as described in claim 1, characterized in that, The housing (7) is equipped with an LCD screen (1), a start button (8) and a power switch (9).

7. The mechanical testing fixture for a DC relay as described in claim 6, characterized in that, There are two start buttons (8).

8. The mechanical testing fixture for a DC relay as described in any one of claims 1-7, characterized in that, The rotating body (3) is disk-shaped.

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