Aging test device for a direct current contactor

Abstract

An aging test device for DC contactors includes an outer frame with a front opening. A telescopic cylinder is fixedly mounted on the top of the outer frame, and the telescopic shaft of the cylinder passes through the outer frame and is fixedly connected to a pressure plate. A test contact structure and a clamping assembly are installed in the middle of the pressure plate. A placement groove is provided at the bottom of the inner cavity of the outer frame for placing the DC contactor. The test contact structure is vertically aligned with the stationary contact of the DC contactor, and the clamping assembly abuts against the upper surface of the DC contactor. This invention overcomes the shortcomings of the prior art, eliminates the manual wiring step, greatly improves production efficiency, reduces the risk of human error, and effectively ensures the stability and reliability of the DC contactor during testing.

Description

Technical Field

[0001] This utility model relates to the field of DC contactor testing technology, and specifically to an aging test device for DC contactors. Background Technology

[0002] DC contactors are contactor products used in DC circuits, suitable for various new energy fields such as programmable power supplies or uninterruptible power supply systems, forklifts, electric vehicles, and mobile electric charging stations. However, with prolonged use, DC contactors may experience aging, affecting their performance and reliability. Therefore, aging tests are necessary to ensure stable performance.

[0003] Currently, when conducting aging tests on DC contactors, it is necessary to connect the incoming terminals, outgoing terminals, and auxiliary connectors separately. This is mainly done manually, which has the drawbacks of low efficiency and high labor costs. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an aging test device for DC contactors. It overcomes the deficiencies of existing technologies, has a reasonable design, eliminates the need for manual wiring, greatly improves production efficiency, reduces the risk of human error, and effectively ensures the stability and reliability of DC contactors during testing.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An aging test device for DC contactors includes an outer frame with an opening on the front side. A telescopic cylinder is fixedly installed on the top of the outer frame. The telescopic shaft of the telescopic cylinder passes through the outer frame and is fixedly connected to a pressure plate. A test contact structure and a clamping assembly are installed in the middle of the pressure plate. A placement groove is provided at the bottom of the inner cavity of the outer frame for placing the DC contactor. The test contact structure is directly opposite the stationary contact of the DC contactor. The clamping assembly abuts against the upper surface of the DC contactor.

[0007] Preferably, the test contact structure includes a fixing block and a contact rod, the fixing block is fixedly embedded in the pressure plate, and the contact rod passes through the fixing block and is fixedly connected to the fixing block.

[0008] Preferably, the contact rod has an annular protrusion in the middle, and the annular protrusion abuts against the lower surface of the fixing block.

[0009] Preferably, the clamping assembly includes a cylinder body, which is fixedly mounted on a pressure plate. A piston rod is slidably connected in the middle of the cylinder body. A buffer spring is installed between the upper end of the piston rod and the top of the inner cavity of the cylinder body. The lower end of the piston rod extends out of the cylinder body and is fixedly mounted with a pressure block, which abuts against the upper surface of the DC contactor.

[0010] Preferably, the pressure block is made of rubber.

[0011] Preferably, the test contact structure, clamping component and placement slot are provided in multiple sets, and each set of test contact structure and clamping component is evenly arranged side by side on the pressure plate, and each set of placement slots is set in a one-to-one correspondence with each set of test contact structure and clamping component.

[0012] Preferably, a guide rod is vertically fixedly installed on the upper surface of the pressure plate, and a guide sleeve is fixedly embedded on the upper surface of the outer frame. The guide rod passes through the guide sleeve and is slidably connected to the guide sleeve.

[0013] This invention provides an aging test device for DC contactors, offering the following advantages: A telescopic cylinder moves the entire pressure plate downwards, pushing the test contact structure into close contact with the stationary contact of the DC contactor. Simultaneously, a clamping assembly presses against the upper surface of the DC contactor, ensuring stable fixation. This effectively guarantees the stability and reliability of the DC contactor during testing, ensuring the accuracy of test data. Furthermore, the test contact structure is connected to the testing equipment for real-time monitoring of the DC contactor's electrical performance, obtaining accurate data for easy analysis of its aging degree. The modification process eliminates the need for manual wiring, significantly improving production efficiency and reducing the risk of human error, ensuring the accuracy and consistency of test results, and further enhancing the ease of use and reliability of the equipment. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the prior art will be briefly introduced below.

[0015] Figure 1 A schematic diagram of the structure of this utility model;

[0016] Figure 2 A cross-sectional structural diagram of this utility model;

[0017] Figure 3 A schematic diagram of the structure of the pressure plate of this utility model;

[0018] Figure 4 A schematic diagram of the cross-sectional structure of the test contact structure in this utility model;

[0019] Figure 5A schematic diagram of the cross-sectional structure of the clamping component in this utility model;

[0020] Explanation of the labels in the diagram:

[0021] 1. Outer frame; 2. Telescopic cylinder; 3. Pressure plate; 4. Test contact structure; 5. Placement slot; 6. DC contactor; 7. Cylinder body; 8. Piston rod; 9. Buffer spring; 10. Pressure block; 11. Guide rod; 12. Guide sleeve; 41. Fixing block; 42. Contact rod; 43. Annular protrusion. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0023] Example 1, as Figure 1-5 As shown, an aging test device for DC contactors includes an outer frame 1 with a front opening. A telescopic cylinder 2 is fixedly installed on the top of the outer frame 1. The telescopic shaft of the telescopic cylinder 2 passes through the outer frame 1 and is fixedly connected to a pressure plate 3. A test contact structure 4 and a clamping assembly are installed in the middle of the pressure plate 3. A placement groove 5 is provided at the bottom of the inner cavity of the outer frame 1 for placing a DC contactor 6. The test contact structure 4 is directly opposite the stationary contact of the DC contactor 6. The clamping assembly abuts against the upper surface of the DC contactor 6. In this embodiment, the electrical performance of the DC contactor 6 is tested by connecting the test contact structure 4 to the testing equipment.

[0024] Working principle:

[0025] In use, the DC contactor 6 to be tested can be placed in the placement slot 5. Then, the telescopic cylinder 2 is activated, controlling its telescopic axis to extend downwards. This causes the entire pressure plate 3 to move downwards, thereby pushing the test contact structure 4 into close contact with the stationary contact of the DC contactor 6. Simultaneously, the clamping assembly presses against the upper surface of the DC contactor 6 to achieve stable fixation. This effectively ensures the stability and reliability of the DC contactor 6 during testing, guaranteeing the accuracy of the test data.

[0026] The coil terminals of the DC contactor 6 can then be directly connected to the power interface of the test equipment. By adjusting the power parameters, the actual working environment can be simulated. The test equipment can then be connected via the test contact structure 4 to monitor the electrical performance of the DC contactor 6 in real time, obtaining accurate data for easy analysis of its aging degree. Compared to existing technologies that use manual wiring, this method eliminates the manual wiring step, significantly improving production efficiency and reducing the risk of human error. This ensures the accuracy and consistency of test results and further enhances the ease of use and reliability of the equipment.

[0027] In Example 2, as a further preferred embodiment of Example 1, the test contact structure 4 includes a fixing block 41 and a contact rod 42. The fixing block 41 is fixedly embedded in the pressure plate 3, and the contact rod 42 passes through the fixing block 41 and is fixedly connected to it. The fixing block 41 provides stable support for the contact rod 42, and during maintenance, the contact rod 42 can be quickly replaced directly through the fixing block 41, improving equipment maintenance efficiency and ensuring long-term stable operation. Simultaneously, the contact rod 42 is made of a highly conductive material to effectively ensure the transmission accuracy of the test signal.

[0028] In embodiment three, as a further preferred embodiment two, an annular protrusion 43 is provided in the middle of the contact rod 42, and the annular protrusion 43 abuts against the lower surface of the fixing block 41. The annular protrusion 43 can limit the position of the contact rod 42, preventing the contact rod 42 from shifting during use, thereby ensuring a stable connection between the test contact structure 4 and the stationary contact of the DC contactor 6.

[0029] In Example 4, as a further preferred embodiment of Example 1, the clamping assembly includes a cylinder 7, which is fixedly mounted on a pressure plate 3. A piston rod 8 is slidably connected to the middle of the cylinder 7. A buffer spring 9 is installed between the upper end of the piston rod 8 and the top of the inner cavity of the cylinder 7. The lower end of the piston rod 8 extends out of the cylinder 7 and is fixedly mounted with a pressure block 10, which abuts against the upper surface of the DC contactor 6. Therefore, when the clamping assembly is moved downward by the pressure plate 3, the pressure block 10 at the lower end of the piston rod 8 presses against the upper surface of the DC contactor 6, and the elastic force of the buffer spring 9 applies a downward pressure to the piston rod 8. This ensures that the pressure block 10 can always apply a stable clamping force to the DC contactor 6, ensuring that it does not shift during the test, further improving the stability and accuracy of the test. At the same time, the buffer spring 9 can also effectively reduce mechanical impact and extend the service life of the equipment.

[0030] In Example 5, as a further preferred embodiment of Example 1, the pressure block 10 is made of rubber. Therefore, the rubber pressure block 10 can both ensure a buffering effect during contact with the DC contactor 6 to avoid damage to the DC contactor 6, and effectively absorb minor vibrations during the test, further optimizing the clamping effect and ensuring that the DC contactor 6 maintains stable contact even in complex environments, thus improving the reliability and durability of the overall test system.

[0031] In Example 6, as a further preferred embodiment of Example 1, multiple sets of test contact structure 4, clamping component and placement groove 5 are provided. In this embodiment, 5 sets of test contact structure 4, clamping component and placement groove 5 are provided. Each set of test contact structure 4 and clamping component is evenly and side by side installed on pressure plate 3, and each set of placement groove 5 is set one-to-one with each set of test contact structure 4 and clamping component.

[0032] Therefore, a telescopic cylinder 2 can drive the pressure plate 3 to move downward, so as to simultaneously drive multiple sets of test contact structures 4 and clamping components to contact the stationary contacts of the DC contactor 6 and clamp the DC contactor 6, thereby realizing the simultaneous detection of the performance of multiple DC contactors, ensuring the uniformity and comparability of test data, and also greatly improving the detection efficiency.

[0033] In Example 7, as a further preferred embodiment of Example 1, a guide rod 11 is vertically fixedly installed on the upper surface of the pressure plate 3, and a guide sleeve 12 is fixedly embedded on the upper surface of the outer frame 1. The guide rod 11 passes through the guide sleeve 12 and is slidably connected to the guide sleeve 12. Through the sliding cooperation between the guide rod 11 and the guide sleeve 12, the stability and accuracy of the pressure plate 3 during movement can be effectively ensured, avoiding test errors caused by offset, further enhancing the overall coordination and consistency of the test system, and ensuring the accuracy and reliability of each test result.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An aging test device for DC contactors, characterized in that: The device includes an outer frame (1), with an opening on the front side of the outer frame (1). A telescopic cylinder (2) is fixedly installed on the top of the outer frame (1). The telescopic shaft of the telescopic cylinder (2) passes through the outer frame (1) and is fixedly connected to a pressure plate (3). A test contact structure (4) and a clamping assembly are installed in the middle of the pressure plate (3). A placement groove (5) is provided at the bottom of the inner cavity of the outer frame (1). The placement groove (5) is used to place a DC contactor (6). The test contact structure (4) is directly opposite the stationary contact of the DC contactor (6). The clamping assembly abuts against the upper surface of the DC contactor (6).

2. The aging test equipment for DC contactors according to claim 1, characterized in that: The test contact structure (4) includes a fixing block (41) and a contact rod (42). The fixing block (41) is fixedly embedded in the pressure plate (3), and the contact rod (42) passes through the fixing block (41) and is fixedly connected to the fixing block (41).

3. The aging test equipment for DC contactors according to claim 2, characterized in that: The contact rod (42) has an annular protrusion (43) in the middle, and the annular protrusion (43) abuts against the lower surface of the fixing block (41).

4. The aging test equipment for DC contactors according to claim 1, characterized in that: The clamping assembly includes a cylinder (7), which is fixedly mounted on a pressure plate (3). A piston rod (8) is slidably connected in the middle of the cylinder (7). A buffer spring (9) is installed between the upper end of the piston rod (8) and the top of the inner cavity of the cylinder (7). The lower end of the piston rod (8) extends out of the cylinder (7) and is fixedly mounted with a pressure block (10). The pressure block (10) abuts against the upper surface of the DC contactor (6).

5. An aging test device for DC contactors according to claim 4, characterized in that: The pressure block (10) is made of rubber.

6. An aging test device for DC contactors according to claim 1, characterized in that: The test contact structure (4), clamping component and placement slot (5) are provided in multiple sets, and each set of test contact structure (4) and clamping component is evenly and side by side installed on the pressure plate (3). Each set of placement slot (5) is set one-to-one with each set of test contact structure (4) and clamping component.

7. An aging test device for DC contactors according to claim 1, characterized in that: A guide rod (11) is vertically fixed on the upper surface of the pressure plate (3), and a guide sleeve (12) is fixedly embedded on the upper surface of the outer frame (1). The guide rod (11) passes through the guide sleeve (12) and is slidably connected to the guide sleeve (12).

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