Relay testing device

Abstract

The utility model discloses a relay testing device, belongs to the technical field of relay testing, and solves the technical problem that unstable contact is easily caused by actuation vibration in a relay testing process. The device comprises a test bench, the front side of the top of the test bench is provided with a test tool, the test tool comprises a relay connecting seat, the top of the relay connecting seat is provided with a positioning cylinder, the top of the positioning cylinder is provided with a guide conical cylinder, and the sum of the heights of the positioning cylinder and the guide conical cylinder is smaller than the height of a relay. The relay connecting seat is provided with a coil pin and a normally open contact pin corresponding to the relay, the left side of the relay connecting seat is provided with a pressing mechanism for pressing the relay on the relay connecting seat, the rear side of the top of the test bench is provided with an oscilloscope and a controller, and the controller is electrically connected with the coil pin of the relay connecting seat. And a normally open contact pin of the relay connecting seat is electrically connected with the oscilloscope. And the contact stability of the relay and the connecting seat can be improved through the pressing of the pressing mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of relay testing, and more specifically, to a relay testing device. Background Art

[0002] Relay dynamic test can evaluate the current capability of relay under high load conditions. In dynamic test, pulse current or periodic current waveform is applied to simulate the changing current conditions in the actual working environment. By observing the response time, triggering ability and holding ability of the relay under different current conditions, the stability and reliability of its current capability can be evaluated.

[0003] During the dynamic test of the relay, the relay is plugged into the connector. Since the mechanical parts of the relay will vibrate when they are attracted, there is a phenomenon that the vibration may cause poor contact between the relay and the connector, thus affecting the test results. Utility Model Content

[0004] The technical problem to be solved by the utility model is aimed at the above-mentioned deficiencies in the prior art, and the purpose of the utility model is to provide a relay test device which can improve contact stability.

[0005] The technical solution of the utility model is: a relay testing device, including a test bench, a test fixture is provided on the front side of the top of the test bench, the test fixture includes a relay connecting seat, a positioning cylinder matched with the shape of the relay is provided on the top of the relay connecting seat, a guide cone cylinder with a large upper end and a small lower end is provided on the top of the positioning cylinder, the sum of the heights of the positioning cylinder and the guide cone cylinder is less than the height of the relay, the relay connecting seat is provided with coil pins and normally open contact pins corresponding to the relay, a clamping mechanism for pressing the relay against the relay connecting seat is provided on the left side of the relay connecting seat, an oscilloscope and a controller are provided on the rear side of the top of the test bench, the controller is electrically connected to the coil pins of the relay connecting seat, and the normally open contact pins of the relay connecting seat are electrically connected to the oscilloscope.

[0006] As a further improvement, the clamping mechanism includes a connecting column connected to the test bench, the top of the connecting column is rotatably connected to a pressure rod via a rotating shaft, one end of the pressure rod extends to the top of the relay connecting seat, and the outer sleeve of the rotating shaft is provided with a torsion spring, and the two ends of the torsion spring respectively clamp the connecting column and the pressure rod.

[0007] Furthermore, the clamping mechanism includes a cylinder connected to the test bench, a pressure rod is connected to the top of the cylinder, one end of the pressure rod extends to above the relay connection socket, and the controller is electrically connected to the cylinder.

[0008] Furthermore, a pressure block is provided at one end of the pressure rod, and the pressure block is located directly above the relay connecting socket.

[0009] Furthermore, an elastic material layer is provided at the bottom of the pressing block.

[0010] Furthermore, the elastic material layer is made of elastic cotton or silicone.

[0011] Furthermore, the length dimension of the top surface of the relay connection base is smaller than the length dimension of the bottom surface of the relay, and the side walls of the positioning tube on both sides in the length direction of the relay connection base are respectively provided with auxiliary extraction grooves.

[0012] Furthermore, the pull-out-assisting groove passes through the guide cone.

[0013] Furthermore, an inclined mounting surface is provided on the rear side of the top of the test bench, and the oscilloscope and the controller are installed on the inclined mounting surface in an inclined state.

[0014] Furthermore, the controller is a PLC controller or a single-chip microcomputer or an industrial computer.

[0015] Beneficial Effects

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] The utility model provides a positioning cylinder and a guide cone cylinder, so that when installing the relay, the relay can slide from the guide cone cylinder to the positioning cylinder conveniently. When the relay is in the positioning cylinder, the pins of the relay are aligned with the jacks of the relay connector, thereby improving the convenience of installing the relay. After the relay is inserted into the relay connector, the clamping mechanism is used to clamp it, which can improve the contact stability between the relay and the connector, thereby improving the stability of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 It is a left-side structural schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the main structure of the test fixture and the clamping mechanism in the utility model;

[0021] Figure 4 It is a left-side structural schematic diagram of the test fixture and the clamping mechanism in the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the utility model in which the middle pressure rod is flipped 90°;

[0023] Figure 6This is a schematic diagram of the main structure of the medium-voltage rod clamping relay of the utility model;

[0024] Figure 7 It is a left-side structural schematic diagram of the medium-voltage rod clamping relay of the utility model;

[0025] Figure 8 This is a schematic diagram of the main structure of the cylinder used in the clamping mechanism of the utility model.

[0026] Among them: 1-test bench, 2-test fixture, 3-relay connecting seat, 4-positioning cylinder, 5-guide cone cylinder, 6-clamping mechanism, 7-oscilloscope, 8-controller, 9-connecting column, 10-rotating shaft, 11-pressure rod, 12-torsion spring, 13-cylinder, 14-pressure block, 15-elastic material layer, 16-auxiliary extraction groove, 17-inclined mounting surface, 18-relay. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0028] See also Figures 1 to 8 A relay test device comprises a test bench 1, and a test fixture 2 is provided on the front side of the top of the test bench 1. The test fixture 2 comprises a relay connection seat 3, and a positioning cylinder 4 matching the shape of the relay is provided on the top of the relay connection seat 3, and a guide cone 5 with a large upper end and a small lower end is provided on the top of the positioning cylinder 4, and the sum of the heights of the positioning cylinder 4 and the guide cone 5 is less than the height of the relay. The relay connection seat 3 is provided with coil pins and normally open contact pins corresponding to the relay. A clamping mechanism 6 for pressing the relay to the relay connection seat 3 is provided on the left side of the relay connection seat 3. An oscilloscope 7 and a controller 8 are provided on the back side of the top of the test bench 1, and the controller 8 is electrically connected to the coil pins of the relay connection seat 3, and the normally open contact pins of the relay connection seat 3 are electrically connected to the oscilloscope 7.

[0029] In one embodiment, Figure 3-Figure 7 As shown, the clamping mechanism 6 includes a connecting column 9 connected to the test bench 1, the top of the connecting column 9 is rotatably connected to a pressure rod 11 through a rotating shaft 10, one end of the pressure rod 11 extends to the top of the relay connecting seat 3, and the outer periphery of the rotating shaft 10 is provided with a torsion spring 12, and the two ends of the torsion spring 12 clamp the connecting column 9 and the pressure rod 11 respectively.

[0030] In one embodiment, Figure 8 The clamping mechanism 6 shown includes a cylinder 13 connected to the test bench 1 , a pressure rod 11 is connected to the top of the cylinder 13 , one end of the pressure rod 11 extends above the relay connection seat 3 , and the controller 8 is electrically connected to the cylinder 13 .

[0031] A pressing block 14 is provided at one end of the pressing rod 11, and the pressing block 14 is located directly above the relay connection seat 3. An elastic material layer 15 is provided at the bottom of the pressing block 14, and preferably, the elastic material layer 15 is made of elastic cotton or silicone.

[0032] The length dimension of the top surface of the relay connection seat 3 is smaller than the length dimension of the bottom surface of the relay, that is, the relay protrudes from both sides of the relay connection seat 3, and the side walls of the positioning cylinder 4 on both sides of the length direction of the relay connection seat 3 are respectively provided with auxiliary extraction grooves 16. Preferably, the auxiliary extraction grooves 16 penetrate the guide cone 5.

[0033] An inclined mounting surface 17 is provided at the rear side of the top of the test bench 1 , and the oscilloscope 7 and the controller 8 are mounted on the inclined mounting surface 17 in an inclined state for easy viewing.

[0034] The controller 8 is a PLC controller, a single chip microcomputer or an industrial computer.

[0035] Working process: Figure 5-Figure 7 As shown, during installation, first turn the pressure rod 11 upward 90°, then put the relay 18 into the guide cone 5, and drop it into the positioning cylinder 4. At this time, the pins of the relay 18 are just aligned with the jacks of the relay connector 3. After the relay 18 is inserted into the relay connector 3, release the pressure rod 11. Under the action of the torsion spring 12, the pressure rod 11 always presses the relay 18 through the pressure block 14. The controller 8 sends a pulse current or a periodic current waveform to the relay 18, and the oscilloscope 7 is used to observe the response time, triggering ability, and holding ability of the relay 18 under different current conditions.

[0036] When disassembling, the pressing rod 11 is turned upward by 90°, two fingers are respectively used to hold the two ends of the bottom of the relay 18 through the auxiliary extraction grooves 16, and then the relay 18 is pulled out along the auxiliary extraction grooves 16.

[0037] The utility model provides a positioning cylinder and a guide cone cylinder, so that when installing the relay, the relay can slide from the guide cone cylinder to the positioning cylinder conveniently. When the relay is in the positioning cylinder, the pins of the relay are aligned with the jacks of the relay connector, thereby improving the convenience of installing the relay. After the relay is inserted into the relay connector, the clamping mechanism is used to clamp it, which can improve the contact stability between the relay and the connector, thereby improving the stability of the test.

[0038] The above are only preferred implementations of the utility model. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent.

Claims

1. A relay test device, comprising a test bench (1), characterized in that: A test fixture (2) is provided on the front side of the top of the test bench (1), and the test fixture (2) includes a relay connection seat (3). A positioning cylinder (4) matching the appearance of the relay is provided on the top of the relay connection seat (3). A guide cone cylinder (5) having a large upper end and a small lower end is provided on the top of the positioning cylinder (4). The sum of the heights of the positioning cylinder (4) and the guide cone cylinder (5) is less than the height of the relay. The relay connection seat (3) is provided with a coil pin and a normally open contact pin corresponding to the relay. A pressing mechanism (6) for pressing the relay onto the relay connection seat (3) is provided on the left side of the relay connection seat (3). An oscilloscope (7) and a controller (8) are provided on the rear side of the top of the test bench (1). The controller (8) is electrically connected to the coil pin of the relay connection seat (3), and the normally open contact pin of the relay connection seat (3) is electrically connected to the oscilloscope (7).

2. A relay test device according to claim 1, characterized in that: The clamping mechanism (6) comprises a connecting column (9) connected to the test bench (1); the top of the connecting column (9) is rotatably connected to a pressure rod (11) via a rotating shaft (10); one end of the pressure rod (11) extends to the top of the relay connecting seat (3); a torsion spring (12) is provided on the outer periphery of the rotating shaft (10); and the two ends of the torsion spring (12) respectively clamp the connecting column (9) and the pressure rod (11).

3. A relay test device according to claim 1, characterized in that: The clamping mechanism (6) comprises a cylinder (13) connected to the test bench (1), a pressure rod (11) is connected to the top of the cylinder (13), one end of the pressure rod (11) extends above the relay connection seat (3), and the controller (8) is electrically connected to the cylinder (13).

4. A relay test device according to claim 2 or 3, characterized in that: A pressure block (14) is provided at one end of the pressure rod (11), and the pressure block (14) is located directly above the relay connection seat (3).

5. A relay test device according to claim 4, characterized in that: An elastic material layer (15) is provided at the bottom of the pressing block (14).

6. A relay test device according to claim 5, characterized in that: The elastic material layer (15) is made of elastic cotton or silica gel.

7. A relay testing device according to claim 1, characterized in that: The length dimension of the top surface of the relay connection seat (3) is smaller than the length dimension of the bottom surface of the relay, and the side walls of the positioning cylinder (4) on both sides in the length direction of the relay connection seat (3) are respectively provided with auxiliary extraction grooves (16).

8. A relay testing device according to claim 7, characterized in that: The pull-out-assisting groove (16) passes through the guide cone (5).

9. A relay testing device according to claim 1, characterized in that: An inclined mounting surface (17) is provided on the rear side of the top of the test bench (1), and the oscilloscope (7) and the controller (8) are mounted on the inclined mounting surface (17) in an inclined state.

10. A relay testing device according to claim 1, characterized in that: The controller (8) is a PLC controller, a single-chip microcomputer or an industrial computer.

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