A DC contactor test tool

Abstract

A DC contactor test fixture comprises a base, test slot assemblies are installed on both sides of the upper surface of the base, a telescopic cylinder is arranged between the two test slot assemblies, and a pressure block is connected above the telescopic cylinder through a telescopic shaft; each test slot assembly comprises a front baffle and a rear baffle, a limit column is arranged between the front baffle and the rear baffle, a placement slot is formed between the front baffle, the rear baffle and the limit column, a ejector fixing block is installed in the placement slot, two ejectors are installed on the ejector fixing block, when the DC contactor is inverted into the placement slot, the upper surfaces of the two ejectors correspond to the two static contacts of the DC contactor respectively, and a convex plate is arranged at the end of the pressure block, the convex plate is directly opposite to the placement slot, and is used to press down the DC contactor. The utility model overcomes the shortcomings of the prior art, the whole process is convenient and fast, and can greatly improve the test efficiency of the static contacts of the DC contactor.

Description

Technical Field

[0001] The utility model relates to the technical field of DC contactor testing, in particular to a DC contactor testing tool. Background Art

[0002] DC contactor is an electrical appliance that uses a small current switch to control a large current. With the continuous expansion of its application areas, such as the continuous expansion of its use in engineering machinery and new energy vehicles, the application areas of the product are also expanding. At the same time, various fields have put forward higher requirements for the safety and reliability of the product.

[0003] At present, the performance test of high-voltage DC contactor products is mostly done manually, mostly by manual sampling. The manual operation process is complicated and cumbersome, not only requiring a large number of inspectors, but also with high labor intensity and low efficiency. Or the test is done by fixtures with low automation. However, due to the large variety of high-voltage DC contactor specifications, different frame products have different dimensions, main contact spacing, and main contact surface dimensions. Almost every frame product requires a set of special fixtures, which is not conducive to improving test efficiency. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a DC contactor testing tool, which overcomes the deficiencies of the prior art, has a reasonable design, and the entire process is convenient and fast, and can greatly improve the testing efficiency of the static contacts of the DC contactor.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A DC contactor test fixture comprises a base, wherein test slot assemblies are installed on both the front and rear sides of the upper surface of the base, a telescopic cylinder is arranged between the two test slot assemblies, and a pressure block is connected to the top of the telescopic cylinder through a telescopic shaft;

[0007] Each of the test slot body components includes a front baffle and a rear baffle, a limiting column is arranged between the front baffle and the rear baffle, a placement groove is formed between the front baffle, the rear baffle and the limiting column, a ejector fixing block is installed in the placement groove, and two ejectors are installed on the ejector fixing block. When the DC contactor is inverted into the placement groove, the upper surfaces of the two ejectors respectively correspond to the two static contacts of the DC contactor, and a convex plate is arranged at the end of the pressing block, and the convex plate is directly opposite to the placement groove up and down, and is used to press down the DC contactor.

[0008] Preferably, a hollow cavity is provided inside the base, two conducting rods are provided in the hollow cavity, the lower ends of the two ejector pins are respectively connected to the two conducting rods through wires, and the ends of the conducting rods pass through the base.

[0009] Preferably, the limiting column includes two outer columns and one middle column, the two outer columns are respectively arranged at the two ends of the placement slot, the middle column is arranged in the middle of the placement slot, the middle column divides the placement slot into a left placement slot and a right placement slot, and the left placement slot and the right placement slot are both provided with an ejector fixing block and an ejector;

[0010] Two convex plates are respectively arranged at the front and rear ends of the pressing block, and the two convex plates are respectively opposite to the left placement groove and the right placement groove in the upper and lower directions.

[0011] Preferably, guide grooves are provided above the left and right side surfaces of the middle column and above the opposite surfaces of the two outer columns, and the guide grooves are used to guide the DC contactor.

[0012] Preferably, a guide sleeve is installed in the middle of the ejector fixing block, the ejector passes through the guide sleeve and is slidably connected to the guide sleeve, the lower end of the ejector is threadedly connected to a limiting nut, the upper end of the ejector is provided with a contact block, and a reset spring is provided between the lower surface of the contact block and the upper surface of the ejector fixing block.

[0013] Preferably, a large contactor test slot assembly is also installed on the upper surface of the base, and the large contactor test slot assembly comprises a slot body, a fixing plate is installed in the slot body, and a contact ejector pin is installed on the fixing plate.

[0014] Preferably, limiting grooves are provided on both the left and right sides of the groove body.

[0015] The utility model provides a DC contactor testing tool. It has the following beneficial effects: by placing the DC contactor upside down into the placement slot, the two static contacts of the DC contactor are made to contact with the two ejector pins accordingly. Then the telescopic cylinder is controlled to drive the pressing block to move downward, so that the convex plate at the end of the pressing block applies a downward force to the DC contactor, so that the static contact of the DC contactor can be stably contacted with the two ejector pins, so that the two conducting rods can be connected respectively through the two ejector pins, and then the detection device can be connected through the two conducting rods to test the insulation resistance and withstand voltage performance of the static contacts of each DC contactor. The whole process is convenient and quick, and can greatly improve the test efficiency of the static contacts of the DC contactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings required for describing the prior art are briefly introduced below.

[0017] Figure 1 A schematic diagram of the structure of the utility model;

[0018] Figure 2 The cross-sectional structure of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 3 A schematic diagram of the structure of the test tank assembly in the utility model;

[0020] Figure 4 for Figure 2 A partial enlarged view of the middle A;

[0021] Figure 5 The cross-sectional structure of the utility model is shown in FIG. Figure 2 ;

[0022] Description of the numbers in the figure:

[0023] 1. Base; 2. Telescopic cylinder; 3. Press block; 4. Front baffle; 5. Rear baffle; 6. Limit column; 7. Ejector fixing block; 8. Ejector; 9. Convex plate; 10. Guide groove; 11. Guide sleeve; 12. Limit nut; 13. Contact block; 14. Reset spring; 15. Conducting rod; 21. Slot body; 22. Fixing plate; 23. Contact ejector; 24. Limit groove; 61. Outer column; 62. Middle column. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0025] Embodiment 1, as Figure 1-4 As shown, a DC contactor test fixture includes a base 1, test slot assemblies are installed on the front and rear sides of the upper surface of the base 1, a telescopic cylinder 2 is arranged between the two test slot assemblies, and a pressure block 3 is connected to the top of the telescopic cylinder 2 through a telescopic shaft;

[0026] Each test slot assembly includes a front baffle plate 4 and a rear baffle plate 5, a limiting column 6 is arranged between the front baffle plate 4 and the rear baffle plate 5, a placement groove is formed between the front baffle plate 4, the rear baffle plate 5 and the limiting column 6, a ejector fixing block 7 is installed in the placement groove, and two ejector pins 8 are installed on the ejector fixing block 7. When the DC contactor is inverted into the placement groove, the upper surfaces of the two ejector pins 8 respectively correspond to the two static contacts of the DC contactor, and a convex plate 9 is arranged at the end of the pressing block 3. The convex plate 9 is directly opposite to the placement groove up and down, and is used to press down the DC contactor.

[0027] In this embodiment, a hollow cavity is provided inside the base 1 , and two conducting rods 15 are provided in the hollow cavity. The lower ends of the two ejector pins 8 are respectively connected to the two conducting rods 15 through wires, and the ends of the conducting rods 15 pass through the base 1 .

[0028] Working principle:

[0029] When in use, first control the telescopic cylinder 2 to drive the pressure block 3 to move upward, and then invert the DC contactor into the placement slot, so that the two static contacts of the DC contactor are in contact with the two ejector pins 8. Then control the telescopic cylinder 2 to drive the pressure block 3 to move downward, so that the convex plate 9 at the end of the pressure block 3 applies a downward force to the DC contactor, so that the static contact of the DC contactor can be in stable contact with the two ejector pins 8, so that the two conducting rods 15 can be connected respectively through the two ejector pins 8, and then the detection device can be connected through the two conducting rods 15 to test the insulation resistance and withstand voltage performance of the static contacts of each DC contactor. The whole process is convenient and fast, which can greatly improve the test efficiency of the static contacts of the DC contactor.

[0030] Embodiment 2, as a further preferred embodiment of embodiment 1, the limiting column 6 includes two outer columns 61 and an intermediate column 62, the two outer columns 61 are respectively arranged at the two ends of the placement groove, the intermediate column 62 is arranged in the middle of the placement groove, the intermediate column 62 divides the placement groove into a left placement groove and a right placement groove, and the left placement groove and the right placement groove are both provided with a ejector fixing block 7 and an ejector 8; the front and rear ends of the pressing block 3 are respectively provided with two convex plates 9, and the two convex plates 9 are respectively opposite to the left placement groove and the right placement groove up and down.

[0031] The placement slot is divided into a left placement slot and a right placement slot by the middle column 62, and as shown in the figure, the ejector fixing blocks 7 in the left placement slot and the right placement slot can be set at different heights for different types of DC contactors, so that the left placement slot and the right placement slot can be tested for two different types of DC contactors at the same time. This also improves the adaptability of the test tooling.

[0032] Embodiment 3, as a further preferred solution of embodiment 1, guide grooves 10 are provided above the left and right side surfaces of the middle column 62 and above the opposite surfaces of the two outer columns 61, and the guide grooves 10 are used to guide the DC contactor.

[0033] The guide groove 10 can be used to define the position of the DC contactor, and the guide groove 10 also provides a certain guiding effect when the DC contactor is placed upside down in the left placement groove or the right placement groove.

[0034] Embodiment 4, as a further preferred scheme of embodiment 1, a guide sleeve 11 is installed in the middle of the ejector fixing block 7, the ejector 8 passes through the guide sleeve 11 and is slidably connected with the guide sleeve 11, the lower end of the ejector 8 is threadedly connected with a limiting nut 12, the upper end of the ejector 8 is provided with a contact block 13, and a return spring 14 is provided between the lower surface of the contact block 13 and the upper surface of the ejector fixing block 7.

[0035] After the DC contactor is placed in the placement groove, a downward force is applied to the DC contactor through the convex plate 9 at the end of the pressing block 3, so that the ejector pin 8 has a downward force, so that the ejector pin 8 moves downward along the guide sleeve 11 to compress the reset spring 14, so that the static contact of the DC contactor and the ejector pin 8 are softly connected. At the same time, through the elastic force of the reset spring 14, the ejector pin 8 always has an upward force during the test, thereby ensuring stable contact between the ejector pin 8 and the static contact.

[0036] Embodiment 5, as Figure 5 As shown, as a further preferred solution of the first embodiment, a large contactor test slot assembly is also installed on the upper surface of the base 1, and the large contactor test slot assembly includes a slot 21, a fixing plate 22 is installed in the slot 21, and a contact pin 23 is installed on the fixing plate 22. The large contactor test slot assembly can be used to detect a large-volume DC contactor. Since the large-volume DC contactor itself has sufficient weight, there is no need to apply a downward force to the DC contactor, so that the static contact of the large-volume DC contactor can be stably contacted with the contact pin 23. This also effectively improves the adaptability of the test tooling.

[0037] Embodiment 6, as a further preferred solution of embodiment 5, both left and right sides of the slot body 21 are provided with limiting slots 24. The limiting slots 24 can provide a certain guiding and limiting effect on a large-volume DC contactor when it is placed in the slot body 21.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A DC contactor test tool, characterized in that: It comprises a base (1), wherein test slot body assemblies are installed on both the front and rear sides of the upper surface of the base (1), a telescopic cylinder (2) is arranged between the two test slot body assemblies, and a pressing block (3) is connected to the top of the telescopic cylinder (2) via a telescopic shaft; Each of the test slot body components comprises a front baffle (4) and a rear baffle (5), a limiting column (6) is arranged between the front baffle (4) and the rear baffle (5), a placement groove is formed between the front baffle (4), the rear baffle (5) and the limiting column (6), a pin fixing block (7) is installed in the placement groove, two pins (8) are installed on the pin fixing block (7), when the DC contactor is placed upside down in the placement groove, the upper surfaces of the two pins (8) respectively correspond to the two static contacts of the DC contactor, and a convex plate (9) is arranged at the end of the pressing block (3), the convex plate (9) is vertically opposite to the placement groove, and is used to press down the DC contactor.

2. A DC contactor testing tool according to claim 1, characterized in that: The base (1) is provided with a hollow cavity inside, and two conducting rods (15) are provided in the hollow cavity. The lower ends of the two ejector pins (8) are respectively connected to the two conducting rods (15) through wires, and the ends of the conducting rods (15) pass through the base (1).

3. A DC contactor testing tool according to claim 1, characterized in that: The limiting column (6) comprises two outer columns (61) and an intermediate column (62), the two outer columns (61) are respectively arranged at the two ends of the placement slot, the intermediate column (62) is arranged in the middle of the placement slot, the intermediate column (62) divides the placement slot into a left placement slot and a right placement slot, and the left placement slot and the right placement slot are both provided with an ejector fixing block (7) and an ejector (8); Two convex plates (9) are respectively provided at the front and rear ends of the pressing block (3), and the two convex plates (9) are respectively opposite to the left placement groove and the right placement groove in the upper and lower directions.

4. A DC contactor testing tool according to claim 3, characterized in that: Guide grooves (10) are provided above the left and right side surfaces of the middle column (62) and above the opposite surfaces of the two outer columns (61), and the guide grooves (10) are used to guide the DC contactor.

5. A DC contactor testing tool according to claim 1, characterized in that: A guide sleeve (11) is installed in the middle of the ejector fixing block (7); the ejector (8) passes through the guide sleeve (11) and is slidably connected to the guide sleeve (11); the lower end of the ejector (8) is threadedly connected to a limiting nut (12); the upper end of the ejector (8) is provided with a contact block (13); and a return spring (14) is provided between the lower surface of the contact block (13) and the upper surface of the ejector fixing block (7).

6. A DC contactor testing tool according to claim 1, characterized in that: A large contactor test slot assembly is also mounted on the upper surface of the base (1), and the large contactor test slot assembly comprises a slot body (21), a fixing plate (22) is mounted in the slot body (21), and a contact ejector pin (23) is mounted on the fixing plate (22).

7. A DC contactor testing tool according to claim 6, characterized in that: Limiting grooves (24) are provided on both the left and right sides of the groove body (21).

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